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Fujinon GX lenses on digital medium format
- Thread starter rdeloe
- Start date
Nokton48
Well-known member
rdeloe
Well-known member
You are welcome, but I forgot to tell you the most important thing: the size of the image circle does not matter past a certain point because you can't shift that much with a GFX body. The problem is the sensor is deep inside the body. It depends on the lens, but somewhere between 20 mm and 24 mm of shift, the edge of the cavity that contains the sensor appears in the image when shifting. A 20mm shift is a 90 mm image circle, while 25 mm is 99.4 mm. It is possible to "cheat" a bit because good stitching software can combine two images where the overlapping area in one of the images is black from mechanical vignetting, but this doesn't buy you a lot of extra shift room.
The bottom line is for the use case you described (multi-row, multi-column flat stitching), GFX is the wrong tool. You either need to get a medium format back, or (much more sensibly) you need to do what you can with lenses that work.
well I saw it
johnleathwick.wordpress.com
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After interacting with Rob about the tuning of his Apo-Digitar 35’s, and recalling my experience with film-era wide-angle lenses on my Sony A7R2, I became more confident that I could tackle the curvature issue. When an S-K Digitar 47mm in a now largely redundant S-K electronic shutter came up for sale at a good price, I took the plunge. From the technical data provided by S-K, the Digitar 47mm is basically a re-badged Super-Angulon 47mm, with its field coverage stated more conservatively (105mm) to match the higher resolution demands of digital sensors.
At the same time I also purchased an S-K Componon-S 135mm enlarger lens that was best described as ‘manky’. I wanted this not for its glass, but for its B-0 barrel which has Copal #0 threads so that it provides a very convenient aperture-only lens mount. Once the Digitar 47mm arrived, I transferred its front and rear cells into the B-0 barrel, my tuning indicating that with the addition of a 0.05mm shim, it would deliver beautiful results. With its dedicated recessed board it weighs just 220 gms, a saving in weight of nearly a kilogram! Although its protruding rear element imposes similar constraints on camera movements as for the S-K 35mm, it is still capable of delivering beautiful images.
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But S.K SA 47mmXL has only 59.1mm flange focal distance and backfocus as 29.5mm
I can‘t belive it can make sharp corner image：呃：
In search of lighter lenses for the Arca-Swiss F-Universalis
In two previous blog entries, I described my experience of journeying back to my photographic roots – the purchase and use of an Arca-Swiss F-Universalis for use with my Fujifilm GFX. This pr…
johnleathwick.wordpress.com
————————————————————————————————————————————————————————
After interacting with Rob about the tuning of his Apo-Digitar 35’s, and recalling my experience with film-era wide-angle lenses on my Sony A7R2, I became more confident that I could tackle the curvature issue. When an S-K Digitar 47mm in a now largely redundant S-K electronic shutter came up for sale at a good price, I took the plunge. From the technical data provided by S-K, the Digitar 47mm is basically a re-badged Super-Angulon 47mm, with its field coverage stated more conservatively (105mm) to match the higher resolution demands of digital sensors.
At the same time I also purchased an S-K Componon-S 135mm enlarger lens that was best described as ‘manky’. I wanted this not for its glass, but for its B-0 barrel which has Copal #0 threads so that it provides a very convenient aperture-only lens mount. Once the Digitar 47mm arrived, I transferred its front and rear cells into the B-0 barrel, my tuning indicating that with the addition of a 0.05mm shim, it would deliver beautiful results. With its dedicated recessed board it weighs just 220 gms, a saving in weight of nearly a kilogram! Although its protruding rear element imposes similar constraints on camera movements as for the S-K 35mm, it is still capable of delivering beautiful images.
——————————————————————————————————————————————————————————
But S.K SA 47mmXL has only 59.1mm flange focal distance and backfocus as 29.5mm
I can‘t belive it can make sharp corner image：呃：
rdeloe
Well-known member
well I saw it
In search of lighter lenses for the Arca-Swiss F-Universalis
In two previous blog entries, I described my experience of journeying back to my photographic roots – the purchase and use of an Arca-Swiss F-Universalis for use with my Fujifilm GFX. This pr…
————————————————————————————————————————————————————————
After interacting with Rob about the tuning of his Apo-Digitar 35’s, and recalling my experience with film-era wide-angle lenses on my Sony A7R2, I became more confident that I could tackle the curvature issue. When an S-K Digitar 47mm in a now largely redundant S-K electronic shutter came up for sale at a good price, I took the plunge. From the technical data provided by S-K, the Digitar 47mm is basically a re-badged Super-Angulon 47mm, with its field coverage stated more conservatively (105mm) to match the higher resolution demands of digital sensors.
At the same time I also purchased an S-K Componon-S 135mm enlarger lens that was best described as ‘manky’. I wanted this not for its glass, but for its B-0 barrel which has Copal #0 threads so that it provides a very convenient aperture-only lens mount. Once the Digitar 47mm arrived, I transferred its front and rear cells into the B-0 barrel, my tuning indicating that with the addition of a 0.05mm shim, it would deliver beautiful results. With its dedicated recessed board it weighs just 220 gms, a saving in weight of nearly a kilogram! Although its protruding rear element imposes similar constraints on camera movements as for the S-K 35mm, it is still capable of delivering beautiful images.
——————————————————————————————————————————————————————————
But S.K SA 47mmXL has only 59.1mm flange focal distance and backfocus as 29.5mm
I can‘t belive it can make sharp corner image：呃：
As luck would have it, John just posted about his experience with the 47mm APO-Digitar, which is the same as the 47mm Super-Angulon MC -- but not the same as the 47mm XL. The XL is for film. It does not work well on digital.
If John's experience is a guide, the 47mm will not solve your problem either.
Smoothjazz
Active member
Rod,
In regard to the focus stacking and moving water; could you make a focus stack of images and have one shot of the water that you blend into the stack to give the water the definition you would like? I have encountered this issue before and have had mixed results but think it still may be possible. This could also work if there is some moving foliage too; one shot at a faster shutter speed to freeze the foliage in the wind.
In regard to the focus stacking and moving water; could you make a focus stack of images and have one shot of the water that you blend into the stack to give the water the definition you would like? I have encountered this issue before and have had mixed results but think it still may be possible. This could also work if there is some moving foliage too; one shot at a faster shutter speed to freeze the foliage in the wind.
rdeloe
Well-known member
Was this for me (Rob)? Our local Rod does not shoot moving water as far as I know!
I have not tried your technique. It sounds like it could work. However, I'm not a fan of stacking and flat stitching. I'm happier when I get it with one frame, especially in the field. In studio, that's a different story.