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Performance of Arri/Schneider Cinegon 16mm 1,4


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#1 Marc Roessler

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Posted 29 February 2008 - 10:44 AM

Anyone has experience with those lenses on 16mm cameras (Arri standard mount)?
Mine seems to show some vignetting/shadowing of the left corners of the image when
stopped down to more then 4. It's worst at T16, there you see that the edges are blackened
with a rounded shape.
How can this be? Is this normal lens performance? No film test yet, this is just what I'm
seeing on the ground glass. What can be the reason for this? I'd more expect this kind of
shadow when the lens is wide open, but not when stopped down?

Greetings,
Marc

Edited by Marc Roessler, 29 February 2008 - 10:47 AM.

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#2 Johnathan

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Posted 17 May 2008 - 08:56 AM

Anyone in Houston need a camera PA, I'm back in town and ready to work.



Anyone has experience with those lenses on 16mm cameras (Arri standard mount)?
Mine seems to show some vignetting/shadowing of the left corners of the image when
stopped down to more then 4. It's worst at T16, there you see that the edges are blackened
with a rounded shape.
How can this be? Is this normal lens performance? No film test yet, this is just what I'm
seeing on the ground glass. What can be the reason for this? I'd more expect this kind of
shadow when the lens is wide open, but not when stopped down?

Greetings,
Marc


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#3 David Auner aac

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Posted 17 May 2008 - 09:00 AM

Anyone in Houston need a camera PA, I'm back in town and ready to work.


Hi Johnathan,

please change your username as to your FIRST & LAST name per forums rules. Secondly, please don't hijack other people's thread like that. Create your own in the appropriate sub forum.

Cheers, Dave
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#4 Tim Carroll

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Posted 17 May 2008 - 09:16 AM

Anyone has experience with those lenses on 16mm cameras (Arri standard mount)?
Mine seems to show some vignetting/shadowing of the left corners of the image when
stopped down to more then 4. It's worst at T16, there you see that the edges are blackened
with a rounded shape.
How can this be? Is this normal lens performance? No film test yet, this is just what I'm
seeing on the ground glass. What can be the reason for this? I'd more expect this kind of
shadow when the lens is wide open, but not when stopped down?

Greetings,
Marc


Marc,

I've used that lens in the past and never had that problem. On an Arriflex 16S and on an Arriflex 16M. Are you using it on one of those cameras or another camera with an ARRI standard mount? If you are using it with a mount adapter, like on a C-mount camera, the issue could be with the adapter.

Also, keep in mind that those lenses are forty or so years old. They come apart pretty easily, especially the back element screws off with not much effort. It could be that over time someone has changed something on the particular lens you have or some of the elements have come loose.

Best,
-Tim
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