R and RP with m42 lenses (hit the shutter?)

navastronia

5D Classic
Aug 31, 2018
148
174
Contemplating getting an RP next week. I currently shoot with a 5D classic. One of my favorite m42 lenses hits the mirror at infinity focus on that body. Are the R and RP shutters closer or further from the rear element on a lens than is a mirror in a DSLR body like mine? In essence, is there a good chance that a lens that strikes the mirror on a DSLR will hit the shutter on an R or RP?

Edit: when using the EF adapter into an m42 adapter into the lens.
 

padam

EOS 7D MK II
Aug 26, 2015
567
202
There is no mirror in the camera, it will not hit anything (not even close) even if you use rangefinder lenses which, are a lot closer to the sensor than m42 lenses.
I have no trouble using lenses that would hit the mirror even in crop sensor DSLRs.
 
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Del Paso

M3 Singlestroke
Aug 9, 2018
510
468
There is absolutely no risk using a "mirror hitting" lens on an EOS R or RP.
I did it several times, with no issues. The R is great to use with vintage lenses, focusing is much easier than with a DSLR!
I'd recommend an adapter from Novoflex, much more precise (micrometer checked by myself) than the cheaper Chinese models.
 

Mt Spokane Photography

I post too Much on Here!!
Mar 25, 2011
15,421
674
I don't think its physically possible for a lens to hit the shutter on my R. There is a barrier that would stop the lens. It certainly sits further back that the mirror swing of a DSLR.
 
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padam

EOS 7D MK II
Aug 26, 2015
567
202
The only possibility is with collapsible rangefinder lenses in their closed position, they may hit the frame covering the sensor.
 

SecureGSM

EOS 6D MK II
Feb 26, 2017
1,155
189
The only possibility is with collapsible rangefinder lenses in their closed position, they may hit the frame covering the sensor.
This. To be aware and extremely careful with collapsible rangefinder lenses like Rusian M39: Industar 22, 26 tubular lenses these are all Leica knock offs from 40s and 50s last century. I have a large collection of vintage film cameras and can confirm that this can be an issue.
 

Del Paso

M3 Singlestroke
Aug 9, 2018
510
468
This. To be aware and extremely careful with collapsible rangefinder lenses like Rusian M39: Industar 22, 26 tubular lenses these are all Leica knock offs from 40s and 50s last century. I have a large collection of vintage film cameras and can confirm that this can be an issue.
Not convinced!
Leica lenses can be mounted collapsed on Leica cameras (exception: Leica M 5, it's cds cell being in the way).
Since on the EOS R, you'd be using an R to Leica M adapter, the distance from the adapter's bayonet-flange to the shutter will be identical to the bayonet-shutter distance on a Leica.
I'm often using the Elmar 50mm and the 90mm macro elmarit on my R, both collapsed: no issues at all!
 

SecureGSM

EOS 6D MK II
Feb 26, 2017
1,155
189
Russian M39 collapsible lenses are special :)
You can google it. There is a large number of sources advising to be cautious about mounting russian M39 collapsible lenses on Leica cameras.
Yes same Mount thread.
 

Mt Spokane Photography

I post too Much on Here!!
Mar 25, 2011
15,421
674
The shutter is surrounded by a frame. so if the lens is larger than the frame, its going to hit it and not the shutter. You can see that its pretty beefed up above the electrical contacts. Most FF lenses are the diameter of the electrical contact circle, I don't see how its possible for any FF lens to hit the shutter.
untitled0001.jpg
 
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SecureGSM

EOS 6D MK II
Feb 26, 2017
1,155
189
The shutter is surrounded by a frame. so if the lens is larger than the frame, its going to hit it and not the shutter. You can see that its pretty beefed up above the electrical contacts. Most FF lenses are the diameter of the electrical contact circle, I don't see how its possible for any FF lens to hit the shutter.View attachment 186513
Please refer to the photo in the link. Note how the extensible part of the lens when collapsed is:

1. Is much smaller in diameter than it’s mount (39mm) diameter.
2. Protrudes extensively inside the camera
3. Narrow enough to push past the frame of a FF camera body.
4: would damage (scratch) frame potentially

https://flic.kr/p/8Z1exg
 

CanonFanBoy

EOS 5D SR
Jan 28, 2015
3,737
1,305
Irving, Texas
Guys, I run vintage lenses on the R. I use the EF to RF adapter and then screw my M42 to EF adapter on to that. Now, I do not own any collapsible rangefinder lenses and have no idea how far they intrude into a camera, but such a lens would have to protrude deeper than the adapters to cause a problem.
 

SecureGSM

EOS 6D MK II
Feb 26, 2017
1,155
189
Guys, I run vintage lenses on the R. I use the EF to RF adapter and then screw my M42 to EF adapter on to that. Now, I do not own any collapsible rangefinder lenses and have no idea how far they intrude into a camera, but such a lens would have to protrude deeper than the adapters to cause a problem.
Some food for thoughts:
M39 flange distance : 28mm
Canon RF flange distance: 20mm
A Collapsed Industar 22 lens will be protruding into the Canon R camera by approximately : 15mm. Ouch!!! only 5mm gap between the sensor plane and the rear of the lens oO :(
 

CanonFanBoy

EOS 5D SR
Jan 28, 2015
3,737
1,305
Irving, Texas
Some food for thoughts:
M39 flange distance : 28mm
Canon RF flange distance: 20mm
A Collapsed Industar 22 lens will be protruding into the Canon R camera by approximately : 15mm. Ouch!!! only 5mm gap between the sensor plane and the rear of the lens oO :(
True, but not if one is using the EF to RF adapter and then adapting the M39 to that. That gives a 44mm flange distance. However, I would have no idea how that would affect the Industar performance. I have 2x Industar-50-2 50mm f/3.5 lenses, however they were made for 35mm format. Do you know if adapting like I am talking about would affect IQ? I have no idea. I restricted my collecting to M42 mount lenses.
 

SecureGSM

EOS 6D MK II
Feb 26, 2017
1,155
189
With m39 lenses there is no adaptor to EF as the lens flange distance is shorter than EF flange distance. So.the Industar 50-2 lens an M42 used in many Soviet era DSLRs is absolutely going to work.
So, m39 lens can be adopted to mirrorless via a specialised M39 to mirrorless.whatever. But ....
The collapsible lens is a dangerous proposition.

P.S. in you case using multiple adaptors or call them spacers if you like will not affect IQ unless you tilt of shift your focal plane due to an adaptor imperfections
 
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CanonFanBoy

EOS 5D SR
Jan 28, 2015
3,737
1,305
Irving, Texas
With m39 lenses there is no adaptor to EF as the lens flange distance is shorter than EF flange distance. So.the Industar 50-2 lens an M42 used in many Soviet era DSLRs is absolutely going to work.
So, m39 lens can be adopted to mirrorless via a specialised M39 to mirrorless.whatever. But ....
The collapsible lens is a dangerous proposition.

P.S. in you case using multiple adaptors or call them spacers if you like will not affect IQ unless you tilt of shift your focal plane due to an adaptor imperfections
Thanks for the explanation concerning M39.

I've had nothing but great luck and fun with M42 lenses.

 

SecureGSM

EOS 6D MK II
Feb 26, 2017
1,155
189
Grab these if you come across and price was really good:

Jupiter 8m in Nikon Mount Zeiss knock off
Jupiter 8 M39 Zeiss knock off
Helios 40-2. 85mm M39/M42 Zeiss knock off with a distinctive swirly bokeh in portrait lens.
Industar 50 M39 copy of Leica Elmar
 

Mt Spokane Photography

I post too Much on Here!!
Mar 25, 2011
15,421
674
Please refer to the photo in the link. Note how the extensible part of the lens when collapsed is:

1. Is much smaller in diameter than it’s mount (39mm) diameter.
2. Protrudes extensively inside the camera
3. Narrow enough to push past the frame of a FF camera body.
4: would damage (scratch) frame potentially

https://flic.kr/p/8Z1exg
What is the diameter of the barrel? The frame surrounding the shutter is about 22mm high, so the barrel would need to be less than 22mm dia to extend thru the rectangular hole. I don't know if the part is metal or plastic. I know the lens takes a 19mm filter, so its likely a few mm larger than 19. Close!

It might damage the frame in front of the shutter, but if thats cosmetic, that beats going into the shutter or sensor.
 
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