I'm wondering if someone could point me in the right direction
to information regarding the different types of lens mounts
and adapters, specifically for the S16 format (if that plays
a big difference). I'm interested in the designs and attributes,
differences and histories if at all possible.
Thank you in advance.
A lens mount has nothing specifically to do with a film format,
but here's some basic info. I swear I wrote this all up before,
but perhaps it wasn't on the CML. I'm going to skip some ancient
and obscure mounts.
Arri started with their standard mount, which was a ring with
a small tab inside. This was common on the 35mm Arri 2c (and
variants) and the 16mm Arri S. Later they developed the Arri
Bayonet mount, which was the same sized ring with two outer
"wings" that locked the alignment of the lens and
provided a stronger mount. Standard mount lenses could be
used in Bayonet mounts but not the reverse. This mount was
common on later Arri 2c, S, M, 16BL, SR 1, SR 2, 35BL1, 35BL2,
early 35BL3, 3c and early 3 cameras. This very popular mount
was replaced by the Arri PL (Positive Lock) mount, which features
a large four-point flange on the lens and a clamping disk
on the camera for a very strong and stable mount. With adapters,
Arri Standard and Bayonet lenses can be used. This is the
most popular mount available today, standard on such cameras
as later Arri BL3, BL4, BL4s, 535a, 535b, later Arri 3 models,
435, Moviecam Super, Compact, SL, later Aaton 16 & 35
cameras, ArriCam ST and LT models.
A threaded, screw-in lens mount of a rather small size. Generally
only good for small primes and lightweight zooms and used
primarily for small 16mm and industrial video applications.
Cameras include Bolex, Beaulieu, secondary mounts on the Eclair
NPR and ACL, and numerous industrial video cameras. The C-mount
has a very short depth, which means that adapters mounts which
put the lens further out can be made for numerous types. I've
seen adapters for C-mount cameras to take all the Arri mounts,
plus just about any still camera or other cine or video lens
mount one can think of. There's still the issue of the fairly
weak thread design, but some adapters get permanently installed
and hard mounted to the frame of the camera body.
Eclair developed the CA-1 mount for their cameras when introduced
in the late fifties. This mount uses a two-prong flange like
the PL but is much smaller, about the size of the Arri Bayonet.
This mount was available for the 35/16 Cameflex (CM-3), some
high speed cameras and the 16mm NPR and ACL. The ACL also
offered adapters for other mounts including Nikon and the
smaller Arriflex mounts. Today these cameras can also be retrofitted
to PL mounts.
The Aaton mount is a three-prong flange that is about the
same size as the Arri Bayonet mount, but it's great advantage
it it's relatively shallow depth. This allows it to accept
various adapters for Nikon, Leica, and the smaller Arri mounts.
This mount was standard on the Aaton LTR-7, LTR-54, and early
XTR models, and was an option (instead of PL) with the XTR-plus
and XTR-prod. The Aaton mount is almost identical to the Cinema
Products mount (CP-16 and CP-GSMO cameras) and with slight
modification any CP camera can accept Aaton mount lenses.
There are other mounts out there such as BNCR, Panavision,
plus the standard (and not so standard) video lens mounts
but I think this answers the spirit of your question.
I tried a search but was unable to find the exact info I was
Your information is greatly appreciated.
In his comments on lens mounts, Mitch Gross wrote, "with
slight modification any CP camera can accept Aaton mount lenses."
I recently purchased a 15-150mm Angenieux zoom in an Aaton
mount from an outfit in Florida with the intention of having
the mount changed so that I could use it on my CP16R camera.
I wanted this lens specifically because it covers Super-16,
and the price was right. When it arrived at my place in California
I was struck by how much the Aaton mount resembled the CP
My intention was to have the mount changed to an Arriflex
bayonet and to mount it to my CP with an adapter. The idea
here was to make the lens usable on the CP and other cameras
too, as I might want to use it on an ACL or SR some day. However,
it seems that the cost of switching mounts from Aaton to Arri
bayonet (at least according to the quote Century Optics provided)
is more than I can afford. I was so discouraged by Century's
quote that I put the lens on the shelf and haven't pursued
the matter until now.
However, it sounds like Mitch is saying that it's possible
to modify the CP to accept the Aaton mount-lens directly (as
opposed to modifying the lens). This might be the affordable
solution I'm looking for. I'd like to get more information
- can anyone recommend a technician who can do this?
Any ideas about the cost? Is this process reversible? Would
it preclude the use of my other, CP mounted lenses? Any information
would be GREATLY
>However, it sounds like Mitch
is saying that it's possible to modify the CP >to accept the
Aaton mount-lens directly
Ken at Whitehouse AV in Burbank would be the guy to talk to.
>Ken at Whitehouse AV in Burbank
would be the guy to talk to.
I believe the CP-16 specialist who worked at Whitehouse is
now with Visual Products in Ohio. If you can't get info at
one then I suggest you try the other.