At what FL does a Cmount Cine lens cover APS-C?

JohnBar · Joined: 21 Jun 2012 Posts: 581 Location: Liverpool

I am thinking that at longer focal lengths the image circle from a Cmount Cine lens should get bigger and at some focal length they begin to fully cover the sensor of the APS-C format.

Does anyone know for sure at what focal length this takes place?

calvin83 · Joined: 12 Apr 2009 Posts: 7552 Location: Hong Kong

It depends on the design of the lens. Few 50mm starts barely cover aps-c(exception: Fuji 1.4/50 full covers aps-c). Most 75mm should barely or fully covers aps-c. Note that I am referring to the image circle. For some lenses, you can get a larger image circle by remove the baffle or do some surgery on the lens. Usually, slower lens tends to have bigger image circle than a faster lens at the same FL.

BTW, which lens you want to buy?

JohnBar · Joined: 21 Jun 2012 Posts: 581 Location: Liverpool

Hi Calvin,

I am looking at Schneider Cine lenses from the 60s (surprise, surprise Wink

)

upward from 2.8/100mm