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Adapting Lenses to the Fuji GFX

  
 
Peter Figen
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p.63 #1 · p.63 #1 · Adapting Lenses to the Fuji GFX


Picked up a very clean Canon 200mm 2.8 II off of eBay this week and in an hour or so of preliminary testing it looks like a winner on the 100s. No vignetting at all wide open at infinity and only very minor resolution falloff in the corners wide open, which would have no effect on a head and shoulder type shot or just a head shot. Stop it down to f/5.6 and it's sharp everywhere. Very light in weight but still solidly built. Almost a twin to the 135 f/2 really and the bonus was that my tripod collar from the 70-200 f/4 IS fits perfectly. Pretty cool.


Mar 22, 2022 at 07:00 PM
rdeloe
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p.63 #2 · p.63 #2 · Adapting Lenses to the Fuji GFX


Makten wrote:
Speaking of shift adapters... Is there any such on the market that allows tilt and shift in the same direction? I don't understand when you'd want to use them perpendicularly.


The Kipon does this. It's quite clever. They've added a separate direction of shift. It's also really expensive. I don't have one.

Some pictures and user experience here: https://www.getdpi.com/forum/index.php?threads/kipon-is-shipping-tilt-and-shift-adapters-for-gfx-and-x1d.63085/



Mar 22, 2022 at 08:07 PM
bobby350z
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p.63 #3 · p.63 #3 · Adapting Lenses to the Fuji GFX


Is this the adapter we talking?
https://www.bhphotovideo.com/c/product/1457117-REG/kipon_ts_p645_gfx_pentax_645_tilt_shift_to.html



Mar 22, 2022 at 09:21 PM
bobby350z
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p.63 #4 · p.63 #4 · Adapting Lenses to the Fuji GFX


Peter Figen wrote:
Picked up a very clean Canon 200mm 2.8 II off of eBay this week and in an hour or so of preliminary testing it looks like a winner on the 100s. No vignetting at all wide open at infinity and only very minor resolution falloff in the corners wide open, which would have no effect on a head and shoulder type shot or just a head shot. Stop it down to f/5.6 and it's sharp everywhere. Very light in weight but still solidly built. Almost a twin to the 135 f/2 really and the bonus was that my tripod
...Show more

I like my old 200mm f2.8 I. It is a bit long for full body shots. Maybe I posted this before. Vignetting added in post.

20220311_Photography_Class_0076 by Vishi A, on Flickr




Mar 22, 2022 at 09:25 PM
Makten
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p.63 #5 · p.63 #5 · Adapting Lenses to the Fuji GFX


rdeloe wrote:
The Kipon does this. It's quite clever. They've added a separate direction of shift. It's also really expensive. I don't have one.

Some pictures and user experience here: https://www.getdpi.com/forum/index.php?threads/kipon-is-shipping-tilt-and-shift-adapters-for-gfx-and-x1d.63085/


Nice! The tripod mount is in the wrong place for stitching though. :-/



Mar 23, 2022 at 12:44 AM
rdeloe
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p.63 #6 · p.63 #6 · Adapting Lenses to the Fuji GFX


bobby350z wrote:
Is this the adapter we talking?
https://www.bhphotovideo.com/c/product/1457117-REG/kipon_ts_p645_gfx_pentax_645_tilt_shift_to.html


That's the one



Mar 23, 2022 at 07:43 AM
rdeloe
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p.63 #7 · p.63 #7 · Adapting Lenses to the Fuji GFX


Makten wrote:
Nice! The tripod mount is in the wrong place for stitching though. :-/


Sadly they don't get that. Mind you on this one there doesn't look to be a lot of room.

With my Fotodiox Tilt-ROKR, I put a collar around the front. https://www.dpreview.com/forums/thread/4548327
* The positive is the mount to tripod is now in the right place (lens side), and I can rotate inside the collar easily. This arrangement is vastly more useful than a tripod foot that is attached to the adapter, even on the lens side.
* The negative is I had to modify the adapter to allow the collar to fit. Also, it's ugly, and changing lenses is now a pain.

I don't use this adapter a lot, so I just live with it. But someone who had a proper machine shop could inexpensively make a better solution.

This collar solution is an option for that Kipon (judging only by the pictures). However, you'd have to do what I did to allow the collar to fit (make the lens release button flush with the adapter surface, and then operate it with a finger nail).



Mar 23, 2022 at 07:48 AM
bobby350z
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p.63 #8 · p.63 #8 · Adapting Lenses to the Fuji GFX


I wish Fuji would be smart to incorporate a ring like lens collar into their TSE. Most probably it won't happen but let's see when it comes.


Mar 23, 2022 at 08:41 AM
thrice
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p.63 #9 · p.63 #9 · Adapting Lenses to the Fuji GFX


Used to use the Pentax 645 35mm on my A7RII for TS.
I used a tilt adaptor to go from P645 to Nikon F and attached a Novoflex collar to that adaptor. I then used a shift adaptor to go from Nikon F to Sony FE.
The combination worked well after flocking the hell out of the interior of the adaptors to avoid flare.



Mar 24, 2022 at 05:33 PM
rdeloe
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p.63 #10 · p.63 #10 · Adapting Lenses to the Fuji GFX


thrice wrote:
Used to use the Pentax 645 35mm on my A7RII for TS.
I used a tilt adaptor to go from P645 to Nikon F and attached a Novoflex collar to that adaptor. I then used a shift adaptor to go from Nikon F to Sony FE.
The combination worked well after flocking the hell out of the interior of the adaptors to avoid flare.


I did something similar with an original A7R and dual Mirex adapters. It worked quite well.

Like you, I had to flock the adapters (and these were not cheap-o adapters...).

Ironically, given what I use now, I sold them because it was "too heavy".



Mar 24, 2022 at 08:45 PM
 


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Audii-Dudii
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p.63 #11 · p.63 #11 · Adapting Lenses to the Fuji GFX


This is just a crude, outside-the-box, prototype to test whether the image quality that can be achieved will justify the effort of adapting the lens properly, but it definitely works -- ! -- and the initial results are promising (IMO, anyway ... YMMV!):



The lens is the legendary Zeiss 38/f4.5 Biogon. It's the same lens Hasselblad used for its early SWC cameras, except in this case, it was salvaged from an AGI F135 aerial reconnaissance camera. The camera used a pair of them to cover 70 mm roll film, along with a large, electronic control box that operated the electronic shutter and aperture mechanisms.

Unfortunately, because the F135 was an aerial camera, there is no focus mechanism since it was locked at infinity and adjusted using shims. For now, I have tweaked the FFD to set the lens at roughly its hyperfocal distance and in the event I decide to continue with this project, I have a few ideas about how to add a simple focus mechanism without significantly modifying the lens. (Note: The rear element extends nearly 8 mm into the GFX 100S and just clears the body's electronic contacts. The diameter of the rear element is small enough compared to the GFX lens mount that, in theory, it can be shifted up, down, or sideways by roughly 5 mm, so it may be possible to use this as a shift lens provided I can design / fabricate the appropriate mechanism ... we'll see, but if I can pull this off, it sure will be a hoot, eh?)

FYI, I've had this lens since 2002, when I purchased it for $200 to use with my Toyo 23G medium-format view camera. In this application, its short FFD -- 28.7 mm -- and lack of a focus mechanism weren't significant issues, because I focused the lens by moving the rear standard along the camera's central rail and when used with Toyo's deeply recessed lens board, I could just barely focus it at infinity. The lack of a working shutter (as there is no way to use it in its original form in the field) wasn't an issue, either, because I always shot at long exposures, thus simply counted off the time and used the lens cap over the lens to start and stop the exposure.

But enough of that, you say, how does it perform? Well, based on this test photo taken yesterday afternoon standing outside my front door, its prospects are promising, especially if you're a fan of the traditional Zeiss rendering style, which I very much am:



And with the XPan, 65:24 crop, which is how I initially plan to use it, assuming everything proceeds smoothly from here:



Because the lens was designed to cover the 6x6 format, its image circle is between 82-84 mm in diameter, depending upon where you draw the line on sharpness in the corners. Due to the nature of its design, its circle of illumination is subject to the COS^4 law, so it does gradually dim toward the outer edge of the image, although not (IMO) objectionably so...

Anyway, I thought I'd share this for grins-and-giggles...

P.S.: There is a similar version of this lens as used in a different aerial camera available on eBay for $1,700! Of course, it's been listed there for more than four years, so I suspect the seller's price is a bit above the market rate for them (not that there are many of them available, mind you.)

Noon-ish Update: Miss Abby and I went for a walk this morning and I brought the camera along, taking these two photos (as well as many others) along the way:





A few observations: 1) The lens isnt happy when it's pointed directly toward the sun (I added a clamp-on hood for some Minolta MD lens I had on hand, which definitely helped); 2) As presently setup, anything in the foreground that's closer than, say, 20 feet won't be rendered razor-sharp; 3) Even with the XPan format crop, there is a bit of smearing / softening in the very tips of the corners and along the side edges; and 4) It's fun to be working with a fixed-focus, point-and-shoot camera having a 102 MP sensor ... lol.

All in all, though, I generally like what I'm seeing! It's obviously not a modern-design lens and its performance is far from perfect, but I'm after a visually pleasant character, not absolute perfection, so that's plenty okay by me!

Yet another update: I did some aperture testing this afternoon and discovered I had set the aperture around f6.3, which is roughly two stops less than I thought. As you might expect, stopping down to f8 and/or f11 has noticeably improved the image quality, as well as increased the apparent DoF ... win-win!

And here's a photo I took late this afternoon while taking another walk with Miss Abby:



I have to admit that using this camera-lens combo as a glorified point-and-shoot camera is a lot of fun!

Project Permanent Mount is underway!



I opened the lens and removed the remains of the not-needed electronic shutter assembly (although I had to leave several parts of it in place to serve as shims and/or spacers.)

I also confirmed there's no easy or accurate way to remove any of the excess metal from the housing without using a lathe (which I don't have or have access to), so I won't be able to reduce the weight or size of the lens (at least not at the moment.)

The other reason for splitting the lens in half is that it's a lot easier to transfer the screw hole pattern by using the existing part as a template than it is to recreate it by measuring the spacing between the mounting holes ... btdt many, many times in the past.



Mar 26, 2022 at 05:01 AM
leonasj
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p.63 #12 · p.63 #12 · Adapting Lenses to the Fuji GFX


does this lens full covers gfx sensor ?- View-angle Coverage: Diagonal 63 Degree/Vertical 38 Degree/Horizontal 54 Degree


Mar 30, 2022 at 05:01 AM
Audii-Dudii
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p.63 #13 · p.63 #13 · Adapting Lenses to the Fuji GFX


leonasj wrote:
does this lens full covers gfx sensor ?- View-angle Coverage: Diagonal 63 Degree/Vertical 38 Degree/Horizontal 54 Degree


If you're addressing this question to me, the answer is Yes. As proof, see the first photo in my post.

Unfortunately, that photo was taken at what I now believe was approx. f/6.3, which means the DoF didn't extend all the way to the corners, hence there is some softness visible in them.

With the lens stopped down more appropriately to f8 or f11, I found the image quality to improve noticeably but the photos I took with it at these apertures didn't need the additional DoF, so I don't have anything to support my observation.

And I've removed the lens from the camera while I'm fabricating a proper mount for it, so can't take any more until I finish that project. Which, unfortunately, is now stalled while I wait for the M3.5 x 10 screws to mount the lens to the adapter plate I had to order to arrive. <sigh>



Mar 30, 2022 at 08:58 AM
leonasj
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p.63 #14 · p.63 #14 · Adapting Lenses to the Fuji GFX


Audii-Dudii wrote:
If you're addressing this question to me, the answer is Yes. As proof, see the first photo in my post.

Unfortunately, that photo was taken at what I now believe was approx. f/6.3, which means the DoF didn't extend all the way to the corners, hence there is some softness visible in them.

With the lens stopped down more appropriately to f8 or f11, I found the image quality to improve noticeably but the photos I took with it at these apertures didn't need the additional DoF, so I don't have anything to support my observation.

And I've removed the lens from the
...Show more

canon ef 40/2.8 full cover gfx sensor.do you know how about ef 35/2, 35/2IS ,ef 50/1.4 ef50/1.8? any canon ff lens can use on gfx without vigneting at 35mm sensor size and only few can cover full sensor? how calculate what canon ef lens can cover full gfx sensor?

does this tab correct? https://docs.google.com/spreadsheets/d/1uxvvpxJ9QVFFyh0pW2rs9KBmUW9vlh-d-VnbcLDCTn8/edit#gid=0



Mar 30, 2022 at 09:15 AM
DES-1
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p.63 #15 · p.63 #15 · Adapting Lenses to the Fuji GFX


leonasj wrote:
canon ef 40/2.8 full cover gfx sensor.


Are you sure about that? Try shooting below f/8. I did with a fringer adapter. I suppose if you write yourself a note you can remember the myriad of shooting exclusions for adapted EF lenses. From my trial every one of them had limited range of acceptable performance. At first, I thought the 40 was completely acceptable, but it is not. My opinion, it's a good stopgap until you can get a native lens.



Mar 30, 2022 at 09:43 AM
Audii-Dudii
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p.63 #16 · p.63 #16 · Adapting Lenses to the Fuji GFX


leonasj wrote:
does this tab correct? https://docs.google.com/spreadsheets/d/1uxvvpxJ9QVFFyh0pW2rs9KBmUW9vlh-d-VnbcLDCTn8/edit#gid=0


One man's meat is another man's poison! As my own testing has shown, lenses that provide sufficient coverage for my taste and preference may not provide sufficient coverage for another photographer and vice-versa.

In the absence of a defined testing protocol and rigorous adherence to it, there are simply too many possible variables for me to place much confidence in a chart such as you linked to; in fact, based on my experience with my copies of several of the lenses listed therein, I would disagree to a varying degree with several of the conclusions stated.

Which is why, with very few exceptions, the only testing I give much credibility is my own! And this is also why you should do your own testing as well, as my conclusions may not be relevant to you and your requirements.

I posted about my experience with the 38/f4.5 Zeiss Biogon mounted on my GFX 100S more for humor than as a serious suggestion that anybody actually adapt one. For a start, the difficulty in finding a similar one to adapt will be great and probably not cost-effective compared to other options.

That it actually ended up performing very well was a surprise to me, hence my decision to fabricate a proper mount for it in place of rubber bands. But even so, there's no way I would recommend this lens for anybody else unless they already have a copy of it on hand, collecting dust, as I did...

P.S.: I have zero interest in any Canon lenses, so I know next to nothing about them. They simply aren't on my radar, hence I pay them no attention. <shrug>



Mar 30, 2022 at 10:06 AM
leonasj
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p.63 #17 · p.63 #17 · Adapting Lenses to the Fuji GFX


DES-1 wrote:
Are you sure about that? Try shooting below f/8. I did with a fringer adapter. I suppose if you write yourself a note you can remember the myriad of shooting exclusions for adapted EF lenses. From my trial every one of them had limited range of acceptable performance. At first, I thought the 40 was completely acceptable, but it is not. My opinion, it's a good stopgap until you can get a native lens.


i have gf50,gf120 but need somethink very light ,wide 28-35mm and fast f1.8-2.0 for gfx



Mar 30, 2022 at 10:19 AM
thrice
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p.63 #18 · p.63 #18 · Adapting Lenses to the Fuji GFX


leonasj wrote:
i have gf50,gf120 but need somethink very light ,wide 28-35mm and fast f1.8-2.0 for gfx


I don't think you'll find that. Fast/Good/Small pick 2.
Add in the fact that equivalent FL/speed on GFX requires bigger glass to begin with.



Mar 30, 2022 at 05:44 PM
Steve Spencer
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p.63 #19 · p.63 #19 · Adapting Lenses to the Fuji GFX


leonasj wrote:
i have gf50,gf120 but need somethink very light ,wide 28-35mm and fast f1.8-2.0 for gfx


There is one lens that sort of fits the bill here. The Pentax 31 f/1.8 Limited. I has some funky issues at some focal distance and especially around the edges, but is is generally good glass. It also is an AF lens that you have to manually focus, so is less than ideal for focussing. That said it sort of meets your criteria, just don't expect the same performance as your GF 50 or GF 120. You could call it fast, fairly small, and ok performance.



Mar 30, 2022 at 05:49 PM
thrice
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p.63 #20 · p.63 #20 · Adapting Lenses to the Fuji GFX


Wow I'm shocked the 31 limited covers 44x33, it's rather small lens even by 36x24 standards.

Edited on Mar 31, 2022 at 12:59 AM · View previous versions



Mar 30, 2022 at 07:05 PM
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