Manufacturer
Model number (if any)
Mount (c-mount, Arri, etc.)
Focal Length
Aperture
Rear lens diameter
Sensor coverage (16:9, 4:3)
Machining required?
Length
Weight
Minimum aperture
Hi,
That list covers a lot of the basics.
Filter threads?
Inbuilt hood?
The only C-mount lens I have tried is the Pentax 25/1.4. That's a CCTV lens and thus not really the same thing as a cine lens. I was a little surprised when I got it finding that the both the focusing ring and the aperture ring are well damped. Other findings are that there are no click stops (the aperture ring) which I guess some may care about while other user will be happy not to have. Locking pins (not of any interest to me, but you never know)?
I think links should be included, links to members reviews and links to sample images.
Taking it a step further I would like to encourage people to write their personal reviews of lenses they try, use or love. The mentioned Pentax for example has a focus plane that is anything but plane, it has 8, not rounded, aperture blades, the bokeh is nice and coma is pronounced (and more). It takes 27mm filter (not 40.5 as B&H says). Such things could easily be commented on if there was an easy to fill in form for "reviews". That way one doesn't have to be a literate and native English spoken person to share knowledge.
Right now I am using a Canon FD24/2 for my normal lens. I have a Hexanon UC 28/1.8 on its way. Are such lenses of interest as well?
Then again, I tend to overdo things.