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Frequent Contributor
Posts: 68
Registered: ‎11-11-2012

Re: 5DMk3 With vintage Pentax Lenses

Going by your image, it appears that the mirror is hitting the back of the lens (probably the aperture lever) and you photographed the backside of the mirror as it was moving up. Although most older manual focus Pentax lenses (along with other manufactures) can be used with Canon crop bodies without issues, the full frame bodies, with their larger mirrors, can present a problem with some lenses.

 

Here is a lens compatibility chart for the older 5D, but it is probable the same or close with the mark III also.

http://www.panoramaplanet.de/comp/

 

If you really want to use this lens on your body, the aperture lever could be cut or ground down so that it clears clear the 5D mirror, or you could shave your camera's mirror.

 

 

 

VIP
Posts: 11,368
Registered: ‎12-07-2012

Re: 5DMk3 With vintage Pentax Lenses

Although the photos are nice, they are not anything a new EF lens can't do, so am I to assume the reasoning is simply cost?

I know it is/was for me as I have a pretty big collectiion of FD lens'. I would love to use but all efforts have failed to exceed what new EF lens' can do.

EOS 1DX and 1D Mk IV and several lenses!
Reputable Contributor
Posts: 754
Registered: ‎11-14-2012

Re: 5DMk3 With vintage Pentax Lenses

Bokeh? That´s why I use my lens. If you are a film maker, I suppose changing the aperture is easier and smoother.

New Contributor
Posts: 4
Registered: ‎03-05-2013

Re: 5DMk3 With vintage Pentax Lenses

Cool, thanks for all the suggestions guys.  I think I'm going to try removing that tab, since I think you're right that the camera would take photos just fine except for the mirror getting hit.  The reason for wanting to use these lenses (the pictured one is a 50mm and I also have a 150mmZoom and a 28mm and a 2X teleconverter) is really to experiment and see what I can get out of them.  Seeing that I have them I'd like to use them rather than going to something new.

New Contributor
Posts: 4
Registered: ‎03-05-2013

Re: 5DMk3 With vintage Pentax Lenses

[ Edited ]

Well, everything seems to be working fine, nothing a hack saw and a file won't fix.  Here are a few test images from some co-operative co-workers.  Manual focus takes a little getting used to.  Each of these shots are uncorrected, straight out of the camera.157A5396.jpg157A5397.jpg157A5398.jpg

VIP
Posts: 11,368
Registered: ‎12-07-2012

Re: 5DMk3 With vintage Pentax Lenses

As something to play with and test,I am all in with you but as a practical use, you've lost me.

EOS 1DX and 1D Mk IV and several lenses!
Frequent Contributor
Posts: 72
Registered: ‎02-07-2013

Re: 5DMk3 With vintage Pentax Lenses

[ Edited ]
Using very old lenses with adapters can be not only funny, but also artistically very useful for stills and video (and cheap too)

My biggest concern is the potential damage to the mirror if it's hitting the lens' lever. I wouldn't test it on a 5D Mark 3 unless completely sure there's no problem at all. Too expensive camera to test with!

The lens chart posted before is a great guide, but make sure your lens doesn't make any damaga anyway.

Just our 2 cents.

Cheers
HD Cam Team
Group of photographers and filmmakers using Canon cameras for serious purposes.
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Frequent Contributor
Posts: 68
Registered: ‎11-11-2012

Re: 5DMk3 With vintage Pentax Lenses

While it is certainly best to never let it happen, the mirror is a lot tougher than people think. The mirror on my 5DII has hit numerous times on multiple lenses without any ill-effects.

 

Question for ebiggs1. Did the adapter that you used for the FD mount lenses have corrective glass (for achieving infinity focus)? That would explain why the quality was so bad.

 

 

 

 

Highlighted
VIP
Posts: 11,368
Registered: ‎12-07-2012

Re: 5DMk3 With vintage Pentax Lenses

Yes the two I have, have a corrector lens and 'yes' they are quite horrible.

The Jakub Mika adapter is interesting and I am considering buying one. I have one FD lens in particular that I would love to use. It is a 600mm f4.5. It was/is a fantastic lens, in the day anyway.

I am a little hesitant to remove the aperture lever but really why not? I will never use it again on my F1n?

I have tried to use the F1n and scan the negatives or slide into CS6. I have had mixed results. Concerns are the extra work involved and the extra expense of a quality scanner. Not to mention film and processing.

 

After a print is made or viewed on a monitor, however, this process makes it pretty difficult to tell which is which. See for yourselves.

One photo is taken with a F1n and a FD lens. The other is a new Canon DSLR with an "L" lens.playground set film vs dslr 2.jpggas pumps.jpg

EOS 1DX and 1D Mk IV and several lenses!
VIP
Posts: 11,368
Registered: ‎12-07-2012

Re: 5DMk3 With vintage Pentax Lenses

[ Edited ]

Hard isn't it?

I am not telling which is which so you must decide for your selves. I have shown this comparison to many people and around half to a little more get it correct. Maybe they are guessing?

EOS 1DX and 1D Mk IV and several lenses!
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