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Archive 2010 · Enlarger lens on dslr?
  
 
Legion5
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p.1 #1 · p.1 #1 · Enlarger lens on dslr?


I'm particularly curious about mounting them to a set of bellows and using them for tilt shift work at a distance.

http://photolog.blog.so-net.ne.jp/archive/c35373277

What are the practical considerations here?



Aug 04, 2010 at 12:29 PM
JohnJ
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p.1 #2 · p.1 #2 · Enlarger lens on dslr?


This has been discussed already, fairly recently, so you might be better off doing a search.







Rodenstock APO-Rodagon-N 80/4 (enlarging lens)






In a nutshell, the biggest problem is achieving infinity focus with relatively short/wide lenses, and still having room for tilt. You generally can't use wide angle lenses at all with such a setup, except for close focus/macro work. You can achieve a large amount of tilt with a 150mm lens and achieve infinity, but a shorter lens, such as an 80mm, won't even focus a few meters with the above setup for example.

Great for macro work though.

Rodenstock APO-Rodagon-N 80/4 (enlarging lens)





Rodenstock APO-Rodagon-N 80/4 (enlarging lens)






The images you linked to are easiest to achieve with a dedicated tilt lens or a medium format lens on a suitable adapter, such as M645 or Hasselblad lenses and the Mirex adapter but tilt is limited compared with dedicated Tilt/Shift lenses. Using a macro bellows of some kind (some have tilt) you will have the same problem as using a view camera. It's effectively the same thing except the view camera is designed to give you all kinds of tilt/shift whilst most bellows are not.

I've used a 100mm enlarging lens on the above rig and it does allow infinity but there is not enough room for movements (tilt).

JJ



Aug 04, 2010 at 01:05 PM
AhamB
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p.1 #3 · p.1 #3 · Enlarger lens on dslr?


JohnJ wrote:
The images you linked to are easiest to achieve with a dedicated tilt lens or a medium format lens on a suitable adapter, such as M645 or Hasselblad lenses and the Mirex adapter but tilt is limited compared with dedicated Tilt/Shift lenses.


Which dedicated TS-lenses are you thinking of? The Mirex has +-10 degree tilt and +-15mm shift whereas the Canon TS-E lenses have +-8.5 degrees tilt and +-12mm shift, to name something.



Aug 04, 2010 at 01:25 PM
JohnJ
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p.1 #4 · p.1 #4 · Enlarger lens on dslr?


AhamB wrote:
Which dedicated TS-lenses are you thinking of? The Mirex has +-10 degree tilt and +-15mm shift whereas the Canon TS-E lenses have +-8.5 degrees tilt and +-12mm shift, to name something.


Fair enough, I stand corrected. I thought most dedicated T/S lenses offered more tilt that that. In practice, the Mirex can't always be used at max tilt anyway, so maybe there's not much practical difference at all.

The Zoerk setup offers much more tilt but they are a specialised setup using enlarging lenses and is not a dedicated T/S lens as such.

JJ



Aug 04, 2010 at 01:37 PM
Legion5
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p.1 #5 · p.1 #5 · Enlarger lens on dslr?


To be specific I'd like to try a 50mm Rodenstock f/2.8 APO lens on a 5D Mark II to shoot portraiture. I imagine that the distance from the focal plane to the rear of the lens isn't such that it would hit the mirror. The purpose of this is simply for quality reasons, you may notice that the images you've produced are simply astounding. I would go to ridiculous lengths to achieve that level of quality. The tilt would be a nice bonus.

If the 50mm f/2.8 is anything like your 80mm f/4.0 and I can get reasonably far focus, and it won't hit the mirror, that is exactly what I want.

Your setup is extended very far from the camera I noticed. What I'm thinking of doing is getting a m39 >m42 >eos adapter and stacking extension tubes until the protruding rear element is just at the right distance for infinity focus. Then I can probably come up with a solution to allow focusing.



Aug 04, 2010 at 02:08 PM
 

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JohnJ
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p.1 #6 · p.1 #6 · Enlarger lens on dslr?


Legion5 wrote:
To be specific I'd like to try a 50mm Rodenstock f/2.8 APO lens on a 5D Mark II to shoot portraiture. I imagine that the distance from the focal plane to the rear of the lens isn't such that it would hit the mirror. The purpose of this is simply for quality reasons, you may notice that the images you've produced are simply astounding. I would go to ridiculous lengths to achieve that level of quality. The tilt would be a nice bonus.

If the 50mm f/2.8 is anything like your 80mm f/4.0 and I can get reasonably far focus, and
...Show more

Sounds like a good project. Using m39 to M42 adapters is the way to go and you can almost use any bellows that suits your purpose.

As an experiment, you can simply hold the 50mm lens in front of the camera (no adapter) and see where it needs to be to achieve the minimum focusing distance or range that you want. Once you know the approx distance the lens needs to be from the camera you can search for a suitable bellows that meets the minimum requirement. It would therefore allow focusing too. You may not need infinity focus anyway

I used the Sinars because I already had them. They are not an ideal camera for this application as the standards don't allow the camera to get close enough to the lens.

JJ



Aug 04, 2010 at 02:26 PM
AhamB
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p.1 #7 · p.1 #7 · Enlarger lens on dslr?


Legion5 wrote:
I'm particularly curious about mounting them to a set of bellows and using them for tilt shift work at a distance.

http://photolog.blog.so-net.ne.jp/archive/c35373277

What are the practical considerations here?


Legion5, almost all of those samples were shot with the Zoerk Multi Focus System (MFS) and Schneider Componar 80/4. It wouldn't work with your 50/2.8 Rodenstock lens, I'm afraid. The extension is too great to provide infinity focus.

There are some shorter (m42) focus helicoids available that would allow you to use your lens at infinity, but without T/S.



Aug 04, 2010 at 02:30 PM
Legion5
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p.1 #8 · p.1 #8 · Enlarger lens on dslr?


AhamB wrote:
Legion5, almost all of those samples were shot with the Zoerk Multi Focus System (MFS) and Schneider Componar 80/4. It wouldn't work with your 50/2.8 Rodenstock lens, I'm afraid. The extension is too great to provide infinity focus.

There are some shorter (m42) focus helicoids available that would allow you to use your lens at infinity, but without T/S.


Thanks Allan, would you be able to point me to these short m42 focusing helicoids?

Fotodiox makes a 16-30mm which should work well, my calculations show it would give me focusing roughly from 2 feet to infinity.

The lens has a protruding rear element which should help the alignment. After some measurement it looks like the front element protrudes about 15mm, which means it would be about 2mm from the flange plane at minimum with all the adapters in place. I would be very surprised if this doesn't allow infinity focus.



Aug 04, 2010 at 03:15 PM
AhamB
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p.1 #9 · p.1 #9 · Enlarger lens on dslr?


I see that Zoerk also has the "Tilt-Tube", which is the tilt socket that comes with the MFS, but then without the focusing helicoid. Maybe you could pair it with a shorter helicoid...

Here's some info: http://forum.mflenses.com/viewtopic.php?t=14063

Perhaps that Fotodiox one is more suited though.



Aug 04, 2010 at 03:30 PM
ZoneV
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p.1 #10 · p.1 #10 · Enlarger lens on dslr?


I have the Rodenstock Apo Rodagon 50 mm / 2.8 (with fungus).
I think that lens can not be focussed (without live view) for portrait distance on a EOS 5D.
But better be more exact (Apo rodagon N 50/2.8):
Rodenstock Enlager Lenses:
46 mm register - 15.7mm protrusion = 30,3 mm.
I think with the EOS 5DII you will need at least (!) 37 mm behind the last lens element for the mirror --> image distance = 56.7 mm (hope to do no miscalculation) -> this results in an maximum object distance ~ 400 mm.

In the same PDF the Rodenstock modular focus system is shown - but that is expensive - but very rigid.

A far cheaper method could be some
DIY work



Aug 05, 2010 at 08:39 AM





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