Topic: Canon 17mm PC lens on Mamiya 645 (Read 11609 times)

Nigel Young · « **on:** November 15, 2009, 11:37:30 pm »

Hi

Has any body thought about fitting the new Canon 17mm shift lens onto a Mamiya 645? I have a 645D with a 17 Mpa Leaf Valeo back, and the with the image circle of the Canon being 67.2mm, this covers the approx 33 x 45 mm dimensions of the back nicely. I've noticed that the mirror lock-up deactivates the back so that it doesn't work, and I'm not sure why that is the case. Any thoughts?

chiek · « **Reply #1 on:** November 16, 2009, 02:42:57 am »

http://luminous-landscape.com/forum/index....showtopic=36322

I hope someone test with 17mm TS and digital back.

bradleygibson · « **Reply #2 on:** November 16, 2009, 03:47:41 am »

Not sure how you'd do that--the mount flange distance for Canon is 44mm and the Mamiya 645 is ~63... (unless you don't need infinity focus?)

Nigel Young · « **Reply #3 on:** November 16, 2009, 03:10:34 pm »

Quote from: bradleygibson

Not sure how you'd do that--the mount flange distance for Canon is 44mm and the Mamiya 645 is ~63... (unless you don't need infinity focus?)

Well there's 2 issues that i can see - the lens gets mounted back inside the body - hence the issue over the mirror lock-up and the camera would be used with a viewfinder, and secondly, given the massive depth of field, does the problem of focus at infinity arise?

bradleygibson · « **Reply #4 on:** November 16, 2009, 04:03:30 pm »

Quote from: Nigel Young

Well there's 2 issues that i can see - the lens gets mounted back inside the body - hence the issue over the mirror lock-up and the camera would be used with a viewfinder, and secondly, given the massive depth of field, does the problem of focus at infinity arise?

With an additional 19mm of extension, yeah, I think there might be an infinity problem.

If you're referring to the adapter linked in the second post, I didn't see a Mamiya 645 in the equation--what device are you talking about when you say mirror lockup is disabled?

In any case, you're going to need optics in your adaptor, or will be shooting at close range... (ignoring aperture control--assuming you want aperture control on the electronic Canon mount.)

Nigel Young · « **Reply #5 on:** November 16, 2009, 06:55:11 pm »

Quote from: bradleygibson

With an additional 19mm of extension, yeah, I think there might be an infinity problem.

If you're referring to the adapter linked in the second post, I didn't see a Mamiya 645 in the equation--what device are you talking about when you say mirror lockup is disabled?

In any case, you're going to need optics in your adaptor, or will be shooting at close range... (ignoring aperture control--assuming you want aperture control on the electronic Canon mount.)

I'm using a Leaf Valeo 17Mpa digital back, but it doesn't work if the mirror is locked up and out of the way.

EricWHiss · « **Reply #6 on:** November 17, 2009, 03:10:55 pm »

Quote from: Nigel Young

Hi

Has any body thought about fitting the new Canon 17mm shift lens onto a Mamiya 645? I have a 645D with a 17 Mpa Leaf Valeo back, and the with the image circle of the Canon being 67.2mm, this covers the approx 33 x 45 mm dimensions of the back nicely. I've noticed that the mirror lock-up deactivates the back so that it doesn't work, and I'm not sure why that is the case. Any thoughts?

You're not going to get very far with this project. Even if you could find a way to get the lens closer, you won't be able to change aperture on the lens. Lot's of people go the other way though and mount mamiya 645 lenses on the canon - using a mirex t/s adapter.

chiek · « **Reply #7 on:** November 17, 2009, 11:23:20 pm »

It needs modified.

please link, mamiya 645 + canon FD85.. F1.2L

http://www.fredmiranda.com/forum/topic/771979

I think mirror shaving is the right way. It can be viewed throught lens image and can focus it.

I will make it, in nearly future.

JK

EricWHiss · « **Reply #8 on:** November 23, 2009, 02:34:51 pm »

That's interesting - I wouldn't have thought this was possible and still the person with the 85 f/1.2 FD lens has not gotten infinity focus with it yet. I don't find the look of this combination appealing at all. The out of focus areas are very busy and hardly worth the effort - why not just use the mamiya 80mm f/1.9 in this case?

As far as the 17mm TSE lens goes - even with the mirror shaved enough (20+ mm?) You'd still have the problems of not being able to set the aperture and its hard to say how much shift and tilt would be available without vignetting. I'm not saying this is impossible anymore. Now I'm just wondering why someone would go through all the effort? If you do it, please post your results.

yaya · « **Reply #9 on:** December 04, 2009, 08:21:52 am »

Quote from: chiek

http://luminous-landscape.com/forum/index....showtopic=36322

I hope someone test with 17mm TS and digital back.

We'll be trying the 17 and 24 TSE lenses on the Hartblei Cam next Thursday in Manchester, UK

rainer_v · « **Reply #10 on:** December 06, 2009, 08:48:08 pm »

Quote from: yaya

We'll be trying the 17 and 24 TSE lenses on the Hartblei Cam next Thursday in Manchester, UK

how they can be stopped down ?

Christopher · « **Reply #11 on:** December 07, 2009, 07:23:02 am »

Quote from: rainer_v

how they can be stopped down ?

As far as I know the hartblei cam, can control it.

yaya · « **Reply #12 on:** December 07, 2009, 09:20:10 am »

Quote from: Christopher

As far as I know the hartblei cam, can control it.

Yes the EOS protocol is supported so aperture control is done on the control pad

Author Topic: Canon 17mm PC lens on Mamiya 645 (Read 11609 times)