C Mount CCTV Securiy Camera Lens
Posted 19 April 2007 - 01:46 AM
Do TV lenses and CCTV lenses cover 16mm?
Posted 19 April 2007 - 03:03 AM
I would guess that CS lenses designed for CCTV cameras will simply not focus properly on movie cameras. When you see a lens with no glass, you can be sure it's useless for film.
Posted 19 April 2007 - 08:00 AM
Posted 19 April 2007 - 01:36 PM
CCTV lenses are usually labeled with 1/3 indicating the chip size, which is quite small. These lenses have very limited coverage. There is another designation, CS, which I believe (but I'm not certain) indicates an alternate (shorter) distance to the chip than standard C. Visually, comparing a CCTV camera's mount to my Bolex, it looks like the distance to film on the Bolex is about 1/2" and the distance to chip on the CCTV is about 1/4".
A 1" CCTV lens will cover S16. That format has a 16mm diagonal. Some of them are quite decent, Canons and Cosmicars. 'Lykliga Skitar', the first S16 movie, used Canon CCTV lenses.
2/3" cover an 11mm diagonal. A bit smaller than a 16mm frame, a tad larger than the TV safe action area.