CV 15 or 21 or 25 on a Kiev anyone?

K

Kin Lau

Guest
I have a 15-30 zoom on an EOS film SLR, but that's huge, so I'm thinking of getting a CV 15 or 21 or 25 on my Kiev's or LTM (I have both systems).

I know the LTM side works just fine, but I heard of the registry differences btwn Nikon S & Contax/Kiev mounts. Cameraquest mentions that the difference isn't a problem due to the large DOF with the ultra-wides, but I would like to hear some experiences.
 
The wider the lense the larger the DOF at a give aperture compared to longer focal lengths. The CV 15 is a cracking lens and is a real bargain given that the retail price includes the VF. This is a very wide lens but has a huge DOF even wide open (use it at 5.6 and it's fantastic). The lens is incredibly small compared to your current Canon optic. I'd advise not using it stopped down beyond f8/ f11 as it's past its best by then.

I've heared that the 21 and 25 snapshot lenses are also very good. The 25 will be more versatile of them all. I believe it uses click stops to help also. Check the CamerQuest link on the CV lenses though to be sure.
 
I bought a SC 21mm for my kiev. No problem with sharpness. Actually, I put on the lens and checked the collimating between the lens and body. It has an incredible DOF. I remembered the focusing was still on (image remained sharp) when I turned it away from infinity. I can't do it with jupiter 12 that is very sensitive to the distance between lens and film plane.

pangkievrange
 
pangkievrange said:
I bought a SC 21mm for my kiev. No problem with sharpness. Actually, I put on the lens and checked the collimating between the lens and body. It has an incredible DOF. I remembered the focusing was still on (image remained sharp) when I turned it away from infinity. I can't do it with jupiter 12 that is very sensitive to the distance between lens and film plane.

pangkievrange
Click to expand...

Thanks... that's exactly the type of experience I wanted to hear about.
 
Errors in ranging subject distance are less important for wide angle lenses than longer lenses due to increased depth of field... at the same subject distance! But if you move in close and fill the frame the same way, you get about the same DoF with the short lens too.

And short focal length lenses are more sensitive to lens-flange registration errors. For instance, a 0.5mm error in flange position represents a much larger proporton of the distance moved by the short lens to focus from 0.7m to Infinity than with a longer lens.

Precision is important!
 
Doug said:
Errors in ranging subject distance are less important for wide angle lenses than longer lenses due to increased depth of field... at the same subject distance! But if you move in close and fill the frame the same way, you get about the same DoF with the short lens too.

And short focal length lenses are more sensitive to lens-flange registration errors. For instance, a 0.5mm error in flange position represents a much larger proporton of the distance moved by the short lens to focus from 0.7m to Infinity than with a longer lens.

Precision is important!
Click to expand...
This may have something to do with the lens design and the distance of optical center to the film plane, etc. I noticed that there's no play room for jupiter 12 not at infinity when I collimated the lens. However, there's a lot of play room for SC 21mm not at infinity.

pangkievrange
 
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