GT35pro 35mm DOF Adapter.

Where to buy Letus Extreme ground glass ?

2011-11-10T10:13:00.000-08:00

I have produced many replacement ground glass for the Letus 35 Extreme and I am now offering it in my store here www.gt35store.com in the 35mm adapter accessories section. I will soon offer ground glass of different custom sizes as well.

New gt35pro Canon FD 35mm DOF adapter

2011-11-10T09:53:00.000-08:00

So I completed a gt35pro Nexus 35mm adapter for a customer in France. I took some shots of the 3 micron ground glass or focusing screen and the images were nothing short of amazing. I used a Canon FD 135mm f2.5 lens on the 35mm DOF adapter and I used my old Lumix FZ5 to snap these 5mp shots of the ground glass. There was absolutely no vignetting and very sharp images edge to edge. A good lens really brought out the best in the gt35pro.And Redrock advertised as being the best 35mm adapter in the world?
Enjoy the pictures after the blog posts.....

Is the 35mm DOF adapter dead?

2011-10-29T03:12:00.001-07:00

35mm adapters are far from dead. There are still many videographers who like the look of the 35mm DOF adapters vs the sterile look that video capable DSLR gives. The 35mm adapter gives an organic look that is closer to 16mm film. Light grain from the vibrating ground glass gives it a filmic quality. Using a 35mm DOF adapter is actually the same process that telecine uses to convert film to digital format. I have been building 35mm adapters since 2008 and have sold all over the world and now in 2011 onwards will continue to build these wonderful devices. The largest adapter maker JAG35 has discontinued all 35mm adapters and some people are wondering where to buy these. The latest GT35pro Elite and Nexus is now version 4a with precise reverse or forward motion of the ground glass controlled by turning 3 leadscrews attached to the wall inside the tube housing. This allows for fine tuning when SLR or DSLR lenses have different infinity focusing points. This feature also allows the user to use different mount converters / adapters without additional optics. This feature is not available in dapters in this price range. You can also use this to level the ground glass or purposely off set it. The Letus Ultimate has this feature but the price is about USD $4000. Even the other expensive models do not have this feature. The gt35pro also use the ULTRAFINE 3 micron ground glass to produce the brightest and highest resolution images available. This is also not available in even the more expensive adapters. Most 35mm DOF adapters use a 5 micron ground glass (smaller is better). For the best images possible the gt35pro series 35mm adapter will give you the best and brightest images possible. Warning: THIS IS NOT A TOY.

Most affordable follow focus kit ever for 35mm DOF adapters and Canon 7D 5D 2Ti 550D

2010-05-02T09:26:00.000-07:00

Here is the first version of the follow focus from gt35pro. It includes a 1/4 circumference lens gear (for Canon EF lenses) or a 1/2 circumference lens gear (for Nikon lenses).
Taking pre-orders now. First batch of units will start shipping 3rd week of May. First 10 units will be sold at $99 and then $120 (Canon EF lenses) and $125 (Nikon lenses).
Lens gear sizes available for 62mm diameter lens (eg. 18-55mm kit lens) and for 68mm diameter (50mm f1.8). Extra focus ring rubber grip for the canon 50mm f1.8 narrow focus ring is available for $5 and this would enable one to use any lens gear with the Canon 50mm f1.8 mkII lens. This unit needs the rods support kit to mount. You can get that at gt35pro.blogspot.com
To order please email me at gt35pro@gmail.com. FIRST 10 ORDERS at $99 and $15 shipping flat rate airmail worldwide.

gt35pro Follow Focus for Canon 7D 5D 35mm dof adapter from Greg Tay on Vimeo.

35mm DOF adapter - Static vs Vibrating

2010-04-20T03:00:00.000-07:00

Static- Advantatages
Fixed static ground glass,
no motor mechanism,
no battery module needed
simple operation hence much Cheaper
Can shoot at higher shutter speeds.
Longer lasting, no parts to breakdown
Can be used in low light conditions when used with a f1.8 lens (Also depending on the camcorder low light capabilities).

Static - Disadvantages
Ground glass has to be spotlessly clean as dust will show up in footage
Limited lenses selection. F-stop maximum 2.8 lenses (usually in the range of f1.2-f2.8 lenses only)
Recommended low cost lenses Canon 50mm f1.8 (USD $90) Nikon 50mm f1.8 (USD $125) and Canon/Nikon 85mm f1.8 ($350 - $500)
Any lenses above 2.8 like the cheaper DSLR kit lens Canon 18-55mm f4.5-f5.6 cannot be used as dark grain from the ground glass will show up in footage.
Rough out of focus background/foreground (bokeh) like looking througn frosted glass). Will look acceptable when scaled down to SD resolution and
less noticeable when shooting in SD format.
Main usage is for web videos and home/vacation or hobby videos.

Vibrating - Advantages
All lenses can be used up to f22. Cheap DSLR zooms will work well too.
Vibration will cause grain and fine dust to be invisible due to motion blur effect.
Can be used in low light conditions when used with most lenses (Also depending on the camcorder low light capabilities).
Will give a good quality picture in HD resolution.
Good quality images can be used for professional work.

Vibrating - Disadvantages
Much more expensive, usually costing up to 30% to 40% more than static adapters.
Max shutter speed is around the 1/180 to 1/200. Moving ground glass grain will be noticeable at higher shutter speeds above 1/200.
Battery module makes the adapter more cumbersome and battery power must be switched on when recording.
Forgetting to switch on the vibrating mechanism will render the shot useless as footage will show grain and dust like a static adapter,
so an LED indicator on the adapter is a must. The gt35pro Vibrating adapter series provides this feature.
LED on the power module is not good enough as you sometimes don't look at the battery module box.

Conclusion -
Unless you are shooting hobby/enthusiast videos or scaled down videos meant for web (youtube or vimeo) and on a budget, You can get the Static version.
For movie production or professional work, the vibrating version is a must.

What lenses to use with a 35mm DOF adapter like the gt35pro Elite or Nexus ?

2010-03-17T05:10:00.000-07:00

Q: Which lenses would you recommend to use with a DOF adapter.
A: I would recommend 3 different lenses. The first is the most basic lens which you will use the most. The is the standard 50mm f1.8 prime lens also known as portrait lens.
http://www.the-digital-picture.com/reviews/canon-ef-50mm-f-1.8-ii-lens-review.aspx

Next lens will be another prime lens. You either get a 85mm f1.8 http://photo.net/equipment/canon/85-1.8

or a 100mm f2.0 http://www.lensplay.com/lenses/lens_data.php?lensID=21

These two lenses are zoom lenses and will give you shallow depth of field when you want to shoot with your camera further away from your subject, still giving you the blurred background. Then you will want a multi purpose lens. This lens can be a zoom 28mm-80mm f4.5-f5.6 cheap lens. This lens is the most flexible but much darker than the prime lenses so it requires more light to give equal brightness. For use with a 35mm DOF adapter you will want to get the older SLR lenses for film because these lenses are made to project the picture to a 35mm film which is much larger than today's new smaller sensor DSLRs (the EF-S Canon lens and DX Nikon lens). This will minimize the dark areas round the corners of the screen also known as vignetting.

gt35pro Elite 35mm adapter edge sharpness mod for HVX200

2010-03-16T19:31:00.000-07:00

Some users have asked me how to improve the picture edge sharpness of the gt35pro Elite 35mm DOF adapter so here is an article to show the modification to be done with the gt35pro Elite when used with a HVX200. This procedure will help give better corner sharpness. If you are using the Canon mount then you will need to go to ebay and buy the cheap asian macro extension tube. On ebay, do a 'macro tube canon' search and you can order one from there. If you are using the Nikon mount then you will need the Nikon extension tubes. This modification will improve corner sharpness by about 50-60 percent. You just need to follow one of the diagrams depending if your locking screws are higher on the #1 ring or lower on the #2 ring (newer models). Here are the pictures to follow...

New update to the GT35pro 7 inch Flip Focus HD LCD monitor

2010-03-09T07:59:00.000-08:00

Just to let everyone know that the new 7" inch Flip Focus HD monitor now supports COMPONENT (YPbPr) input as well as HDMI and Composite inputs. Pricing is the same as before at $279 plus shipping. Also includes a Lithium ion battery operating 7-8 hours non-stop on a full charge.

gt35pro Flip viewfinder module.

2010-02-21T07:36:00.000-08:00

I just created a micro viewfinder which flips the image right side up when used to look at the LCD. This is a prototype which uses prisms and mirrors to flip the picture. It works exactly like the Flip units sold by Cinevate or Redrock micro or SGpro. The best part is that this is very light and can be used hand held run and gun shooting. The mounting solution is now only for the Canon HV20 / HV30/ HV40 series camcorders. I will implement a small knob so the vertical angle of vision can be adjusted slightly. Will be sold below $100. If I can do away with the prism I can lower the price even more. Check out the pics.

3 micron ULTRAFINE ground glass gg for the gt35pro 35mm dof adapters

2010-02-18T05:46:00.000-08:00

From today onwards, all gt35pro DOF adapters will ship with a 3 micron ground glass for the sharpest images. This is the 'ULTRAFINE' ground glass rated at 3 micron. No other adapter makers ship with a 3 micron ground glass except the entire line of gt35pro series. The images will be even much sharper ( 40 percent more) than images produced by any 5 micron ground glass. Diffusion is slightly better than any 5 micron ground glass. The images are also very sharp with the Elite-X and X-Static adapters. Earlier I only provided this with the Static adapters but I have found a technique to produce these much quicker.

Breaking NEWS! New static 35mm adaper to be launched next month!

2009-08-25T23:03:00.000-07:00

Hello everyone,

I will be launching a new more cost effective Static adapter named GT35pro Xstatic 35mm adapter next month. This adapter will look exactly like the GT35pro Standard and will also include the excellent double condenser configuration with achromat included. This will also have the all new Ultrafine ground glass element which is a highly customised gg but can be washed with soap and water just like all the other ground glass for the gt35pro series. It features finer grain equivalent to a 3 micron grind and better diffusion equivalent to a 7 or 8 micron ground glass, and has about equal light loss so it is in every way superior to the 5 micron ground glass. This new ground glass will only be provided in the Xstatic adapter. All other models will still include the standard 5 or 9 or 20 micron. Existing Standard/Advanced/Elite users will be able to purchase the new ground glass but it will not be offered to non gt35pro users. Price TBA.Initial test shows the new gg to be superior.

As you can see, the 5 micron exhibits more grain and has a higher contrast, meaning the diffusion is less. The Ultrafine has a smoother look and less contrast. Check out the image below. This is zoomed in to about 150 percent.

Hotspotting is less and light spread across the entire frame is better.

Sorry about the mis-aligned adapter in the 5 micron image. Could not see properly as room was dark. Please note that the images were in no way processes except for resizing. I am planning to sell this adapter at $175 USD. I will also produce another version for prosumer camcorder series named gt35pro Elite-X and will be cheaper than the current vibrating gt35pro Elite. Also all adapters will include the gt35pro logo and the adapter model.

This article is taken from my thread on HV20.com. Thread here http://www.hv20.com/showthread.php?t=18303

"HOW TO INSTALL THE DIY GG HOLDER KIT"

2009-04-15T20:18:00.000-07:00

Here are the instructions to get you started with your DIY 35mm adapter. The motor fits directly into the hole on the plate which holds the ground glass. It fits exactly and snugly so you need to push it in with some force and it will stay there. The vibrating head can face either way depending on where you drill you hole. As for the distance of the gg holder from the slr lens, it will vary with different condenser lens used if placed between the ground glass and SLR lens. But lets say you want to use a 100mm focal length DCX lens as a condenser. Set your rings in this postiion.
-lensmount #2 #3 #3
() |=]

() is the condenser and |=] is the gg holder. Th fixed part of the gg holder should be fixed into the tube into the right #3 ring. The ground glass should be near the SLR lens. The condenser should be fixed to the leftmost part of the left #3 ring, or in the #2 ring. The closer the condenser is to the gg, the better. You can temporarily hold the fixed part of the gg in place in the tube by putting some hot glue round the edges of the base plate so it can be held in place inside the ring. Attach your SLR lens, preferrably with a telefoto lens so you can see the objects magnified, then set the lens to focus at infinity. Point it to an object about 20 metres away. Then look with your eye through the dof adapter. Now try to move the gg-holder with the focusing screen back and forth until the image far away is getting sharp. When you get it sharp fix the gg-holder at this distance and dont move it again or you will have to readjust it again. Also make sure the gg is parallel to your camcorder lens too. I usually push the gg a very small distance forward to slightly go beyond infinity so I know I definately can get infinity focus. After that hotglue your gg holder properly in place. Some folks put the condenser behind the gg, in between the gg and the camcorder. In this case, the condenser is actually a magnifier. This is not a good config to use as it produces chromatic abberations. But this config is still used by many adapter makers like the jag35.

GT35pro Standard vs GT35pro Advanced

2009-03-24T00:05:00.000-07:00

I've been asked many times what's the difference between my gt35pro Standard and Advanced version so here are the 2 test charts to show the difference. The Advanced version has close to no no chromatic abberations and the Standard version has a slight touch of chromatic abberations at the edges. You will not see the chromatic abberations unless you zoom in to the picture 200 percent at the extreme corner of the frame to notice it. The picture quality is almost identical. Note that this is shot using my Digital Rebel 300D 18-55mm kit zoom lens at 50mm f5.0. Both version features very good edge to edge sharpness. The advanced version is also a tad brighter due to the multi coating on all sides of the glass in the achromat. You can see that in the test charts. The difference in picture quality is very small but there is a price difference of $55. For those who want the perfect picture quality, the $55 may be well worth it. Also note that all other adapter makers do not display test charts.

"5 micron or 9 micron or 20 micron ground glass?"

2009-03-08T19:24:00.000-07:00

The 5 micron ground glass is the made using the 5 micron grade aluminum oxide powder. This means the powder is finer than the 9 and 20 aluminum powder. The finer the grind, the sharper the image will be but it will also cause blown out whites if you are not carefull eg. shooting sky. However, the finer the glass the less diffusion so therefore all 35mm adapters need to use a condenser lens to spread the light more evenly on the surface of the glass, just like in the gt35pro adapters. If you are building your own adapter and don't have a condenser lens then you will see hotspotting or vignetting in your images. The 20 micron ground glass will produce a much softer image but has stronger diffusion so some adapter makers use 20 micron or 25 or 35 micron ground glass without condensers.
This will cut down the vignetting by a measurable amount. But will give you a softer picture but less blown out whites. Also light loss is high and in situations when the aperture is stopped down to below f5.6, the grain becomes visible. The 9 micron ground glass is a good balance between the two other grinds. It gives a more film like softer image but not as soft as the 20 micron. I personally feel that the 5 micron is the best as it gives the sharpest and brightest pictures. We are now in the HD era and we want to keep that high resolution. Softer film look can be done in post production.

GT35pro New Feature

2008-12-03T09:22:00.000-08:00

From today onwards, all versions will have a long awaited feature, a power on LED. Thanks to Wes Roberts for the feedback. The power module will now use a 9 volt battery. Those who still want a single AA battery can request for it but will not have the power LED.

5 micron or 9 micron or 20 micron ground glass?

2008-12-01T18:39:00.000-08:00

The 5 micron ground glass is the made using the 5 micron grade aluminum oxide powder. This means the powder is finer than the 9 and 20 aluminum powder. The finer the grind, the sharper the image will be. However, the finer the glass the less diffusion so therefore all 35mm adapters need to use a condenser lens to spread the light more evenly on the surface of the glass, just like in the gt35pro adapters. If you are building your own adapter and don't have a condenser lens then you will see hotspotting or vignetting in your images. The 20 micron ground glass will produce a much softer image but has stronger diffusion so some adapter makers use 20 micron or 25 or 35 micron ground glass without condensers.
This will cut down the vignetting by a measurable amount. But will give you a very soft picture. Also light loss is high and in situations when the aperture is stopped down to below f5.6, the grain becomes visible. The 9 micron ground glass is a good balance between the 2 other grinds. It gives a more film like softer image but not as soft as the 20 micron. I personally feel that the 5 micron is the best as it gives the sharpest and brightest pictures. We are now in the HD era and we want to keep that high resolution. Softer film look can be done in post production.

2008-11-23T07:56:00.000-08:00

GT35pro Standard vs GT35pro Advanced version
I've been asked many times what's the difference between my gt35pro Standard and Advanced version so here are the 2 test charts to show the difference. The Advanced version has close to no chromatic abberations and the Standard version has a slight touch more chromatic abberations at the edges than the Advanced version. You cannot see the chromatic abberations unless you zoom in to the picture 200 percent to notice it. Note that this is shot using my Digital Rebel 300D 18-55mm kit zoom lens at 50mm f5.0. Both version features very good edge to edge sharpness. The advanced version is also slightly brighter due to the multi coating on all sides of the glass in the achromat. The difference in picture quality is small but there is a price difference of $75. For those who want the perfect picture quality, the $75 may be well worth it.
Standard chart

Advanced chart

GT35pro 35mm Adapter Vimeo footage

2008-10-06T10:21:00.000-07:00

For those of you who have not found my Vimeo test footage, here are all the links:
http://www.vimeo.com/1990189 5 micron GT35pro ELITE f22 test
http://www.vimeo.com/1325495 5 micron ground glass demo
http://www.vimeo.com/1349372 9 micron ground glass demo, indoor lighting
http://www.vimeo.com/1538510 Chromatic Abberations test
http://www.vimeo.com/1538393 Shutter speed test

All videos can be downloaded at full HD 1920x1080 resolution on the respective pages, unlike many other adapter makers who only provide 1280x720 resolution for scrutiny.

Release of the GT35pro Elite

2008-09-27T21:22:00.001-07:00

The GT35pro Elite is available as of today. This version supports the bigger cameras Like the Sony FX1, Sony Z1, Panasonic DVX100, Canon XH-A1 CAnon XH-H1, Canon XH-G1 and also the Panasonic HVX200. Although the HVX200 has a 82mm filter thread diameter, it has been tested to work just like Cinevate's Brevis35 which also uses a 72mm threaded achromat.

Panasonic HVX200 Letus Extreme vs Canon HV20 GT35pro Advanced

2008-08-20T21:32:00.000-07:00

I just made a resolution comparison between the Panasonic HVX200 with Letus Extreme and Canon HV20 with GT35pro Advanced and I'm glad to say that it compares very well. Please note that my test chart was not of a very high resolution hence you see fine patterns merging together. The images have not been sharpened or blurred in any way. I just adjusted the brightness levels to make comparison easier. If you look properly, the Letus is not really sharper than the GT35pro. It has alot of heavy in camera image edge sharpening of the HVX200 that makes it appear so. The Canon HV20 provides a natural image without post processing to increase apparent sharpness. Click on the Top Left Corner Test to view at 100% and you can see a slight chromatic abberation on the HVX200 Letus Extreme. Notice the pinkish/orange fringe on the left edge and a slight blush fringe on the right. Also notice chromatic abberation is non-existent on the HV20 GT35pro combo.

Closeup Lens or Achromat?

2008-08-12T08:52:00.000-07:00

I get alot of emails asking me the difference between an achromat and a closeup(macro) filter lens.
On the right side of this page is a picture showing an achromat and a closeup lens. A closeup lens is a single piece of glass that photographers use to shoot objects at very close distances.

This lens is cheap and easily available at any photographic supplier. It comes in a +1, +2, +4, and+10 diopter power. If you want to shoot even closer, you can stack the lenses up to give you the additional power. eg. put a +2 and +4 lens together and you get a +6 lens. The disadvantage is that this lens produces chromatic abberations and also some edge softness. The cheaper the lens, the worse is the edge softness and chromatic abberations. See here for defination of chromatic abberation http://en.wikipedia.org/wiki/Chromatic_aberration.

Achromatic lens are like closeup lenses but with 2 lenses made of different materials cemented together. These lenses are expensive but do a good job of correcting the chromatic abberations and spherical abberations. See the picture on the right.

The +5 Hoya achromat is much heavier and thicker than the no-name +10 closeup filter. It cost me $80 vs the $20 cheap version. For those who want excellent quality without CA (chromatic abberation), be prepared to pay anywhere around $150-$250 for a good quality achromat. If you are not fussy, you can get the cheap closeup which works well too.

Also note that the chromatic abberations are mostly visible in very high contrast pictures and away from the center. I will be testing 2 Hoya +5 achromat lenses stacked together and I might make that available to the more demanding users. Alternatively you can buy this excellent achromat available on Amazon-The Opteka 10x HD2 Macro. Tough luck to international buyers as they do not ship to most countries. However you can buy it from ebay for a much higher price.
After reading all this you might be wondering why do you need to use a macro lens with a DOF adapter. Here's the answer. Most camcorders need an achromat or macro lens as it needs to focus on the ground glass approximately 2 inches from the lens. Since all lens produce vignetting on the ground glass/focusing screen, you would have to zoom in past the dark edges. If you don't have a achromat or macro then you will get very heavy vignetting, if your camcorder can focus that close. See the wiki description here http://en.wikipedia.org/wiki/Vignetting

More good information regarding macro lenses and achromatic lenses with pictures and samples can be found here http://www.imperialrabbit.com/rescharttest.htm

Comments from users

2008-08-06T13:07:00.000-07:00

Here's a compliment I received from a Letus Extreme user. He took the Letus Extreme apart and replace with the focusing screen from me. This is what he said....

"Hey Greg,
Sorry I didnt send you an email letting you know, but yes, we have received them. I put the 5 micron glass in. I am very happy with the results. IN outdoor lighting with the supplied(Letus35) screen I could not close the 35mm lens down below f5 or 6. I did a test where I closed the lens down close to f20 with your screen and still had a somewhat usable image. This will be great for when we are shooting outdoors and need to buy ourselves some focal range. The image overall looks very clean also!!
Thanks so much!!James "

"Hi Greg,
I got the adapter and it works great. I've got to get a smaller lens, as right now I've got a canon zoom and the whole thing is quite big. Or I've got to get some major support for the lens before I use it. I'm going to try and rig something with mirrors so I can see correctly. Love how it works! Thanks for your great work! I'll recommend you to anyone. Could you tell me what exactly the red button on the motor does? Thanks again,Susan"
Susan Emshwiller
Desert City Film Works
5025 Los Robles Street
Los Angeles, Ca. 90041

Hello Greg! Thanks for your DOF adapter, it already got to our post office here in Prague. I have one week of shooting behind me. I am still learning, but the results are great!! On HF100 a have a visible hotspot, I can avoid it by using a bigger zoom. I playing around with settings, the best results I get with AV mode f2.0 (using CANON EF 50mm/1.8 II lens) + increasing EXPOSURE (+4). Cine mode does not look so great. I decided to buy small LCD TV green (7“) to see what I am shooting, because it is hard to have everything in focus and good composition with the picture upside down :). Maybe I can create my own Vimeo account, I will let you know. I am really happy with your GT35pro!
Dusan
Prague

All enquires

2008-08-03T11:36:00.001-07:00

For all enquires I can be contacted at gt35pro@gmail.com.

GT35pro 35mm DOF adapter power unit.

2008-08-03T11:14:00.000-07:00

I've added the GT35pro power unit picture here. The power unit takes one AA size battery and has a jumpstart button. It uses a standard 3.5mm mono/stereo jack on both ends to supply power to the adapter. So if your cable craps out, you can easily get a replacement at any store that sells audio accessories. I will incorporate a power on indicator in the near future.For the motor to vibrate properly, it cannot vibrate too fast. Sometimes when the power is turned on the motor will not start spinning as it is set to rotate at a slower speed. Press the jumpstart button and it will start the spin. The small hole you see near the jumpstart button is the adjustment for the vibrating motor speed. You need a small flat head jewel screwdriver to adjust it. It has been preset by me and there should be no reason to adjust it, unless you know what you are doing.

FS: Focusing screen/ground glass holder

2008-08-01T03:22:00.000-07:00

On the top right shows my ground glass holder kit. It comes in a set. The gg holder (including the metal legs), the vibrating motor and 2 ground glass of your choice. All the parts have been tested over and over again to make sure that the motor vibrates the focusing screen correctly.

Ground glass performance

2008-07-23T19:38:00.000-07:00

I have alot of enquires about the different grades of ground glass so I'm putting the description here...Here's the difference between the 3 different grinds. the 20 micron grind is the roughest. It works best with adapters without a PCX/Condenser lens as the better diffusion cuts down on vignetting/hotspotting, however it also produces a softer picture and some grain/noise. The 5 micron grind produces the sharpest picture. It is grain free but produces slight vignetting/hotspotting when used in an adapter with PCX/Condenser lens. This will not be ideal on adapters without the PCX/Condenser lens as it will produce severe vignetting. The 9 grind is the best performing focusing screen in my opinion. In adapters with a PCX/Condenser lens, it exhibits no vignetting and the picture quality in between the 5 and the 20 which makes it a touch softer than the 5 micron grind. This makes the image look more filmic. I wanted to add that with the GT35pro Adapter, the vignetting does not apply here as it has 2 different lenses installed inside. One is a magnifier and the other is a condenser lens. This is in addition to the achromat.

GT35pro for sale

2008-07-22T07:54:00.000-07:00

I am pleased to announce that the GT35pro is now for sale. Since this is a customized item, Please contact me to place an order. The Price of the adapter without achromat and lens is USD$260. Contact me at gt35pro@gmail.com

Ground Glass for sale

2008-07-22T07:36:00.000-07:00

For those of you who would like to buy some Focusing screens or ground glass for your 35 mm adapters, I can make them for you. These are the prices.
5 micron grind USD$20 up to 40mm x 30mm size
9 micron grind USD$15 up to 40mm x 30mm size
20 micron grind USD$12 up to 40mm x 30mm size

These glass can be touched washed and cleaned, unlike those canon EE-A or EE-S screens that spoils after you touch it.

You can contact me at gt35pro@gmail.com for other sizes

The affordable 35mm DOF adapter for everyone

2008-07-22T06:01:00.000-07:00

What is a 35mm DOF(depth-of-field) adapter? Here is the Wiki description:

A depth-of-field adapter (often shortened to DOF adapter) is used to achieve shallow depth of field on a video camera whose sensor size is not adequate to achieve it natively. A DOF adapter could theoretically be used on a multitude of platforms, although it is most useful on prosumer digital camcorders where high resolution is a capability but the sensor size is still small enough to elicit use of the adapter. The term 35mm adapter is common, since most designs use a focusing screen the size of a 35mm film frame (24x36 mm) and interface with lenses designed for 35mm cameras.

Notice that the description says that it is most useful on prosumer digital camcorders. This is a blog I created specially to make the 35mm DOF adapter available to all consumers and enthusiasts.