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While we're talking lens stuff, has anyone noticed that the mount on some
very old JVC video cameras is seemingly exactly the same as the mount on the
front of the ACL (with the outside thread, the keying space, and the inside
c-mount)?  I came across an old JVC KY-1900 1-tube video camera with a
broken lens, and the mount on the camera fits my ACL adapters, and the lens
off the video camera fits directly on the ACL body.

I'm not sure this is useful to anybody, just an oddity, but I wondered how
JVC came to use the ACL mount...


From: Wade Ramsey <wramsey@bju.edu>
Reply-To: EclairACL@topica.com
Date: Tue, 26 Feb 2002 19:57:07 -0500
To: EclairACL@topica.com
Subject: Re: Eclair ACL SCHNEIDER

The diagonal of the image area on standard 16mm is 12.7mm.  The
diagonal of a 2/3" chip is 11mm, 1/2" chip is 8mm, and 1/3" chip is
6mm.  Not sure what the 1/4" chips are, but I think about 4mm.

A 16mm camera lens used on a 2/3" chip camera will give a narrower
angle of view than for 16.  A lens made to just cover this chip will
vignette on 16mm, not to mention Super 16, which has a diagonal of

Wade Ramsey

super16acl@aol.com 2/22/02 8:48:34 PM >>>
Technically a lens that can cover 2/3" should cover Super-16 (which
is 1/2" at widest) --- but that doesn't necessarily mean that the lens will be sharp enough for film work. In the end, the only way to know for sure is to try it out.

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