OK ALL YOU full frame camera fanatics

Started Nov 14, 2012 | Discussions thread
Jim Ford Senior Member • Posts: 1,225
I understood that 40 years ago!

Everdog wrote:

For all formats and exposure, F/1.4 is F/1.4. Only with DoF will F/1.4 on 4/3rds look like f/2.8 on FF.

(Well, at least the principle!)

Why do people have so much difficulty with it nowadays and start banging on about photons and pixels?

When I measured the effective aperture of a mirror lens many (very!) years ago, I didn't have to factor in the format of the film the image was to be projected on - 35mm, 1/2 frame, submin. etc..

Jim

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