Focal length 35mm equivalent, but not F-stop?

Started Jul 24, 2014 | Discussions thread
edhannon
edhannon Senior Member • Posts: 1,761
Both are an unecessary crutch

35mm equivalent focal length is a crutch invented to help us old f@*ts to transition from 35mm film to APS-C digital.  It helped us transition from film by knowing what lens to use to get a particular FOV in APS-C using our experience from 35mm film..

However, like learning a second language, real proficiency only comes when you think in the new format.

Same applies to DoF - one needs to learn what DoF will result with the lens/f-stop/sensor size you have - not one that you are currently familiar with.

This transition is easier for those of us who used both 35mm and medium format film. I never did translate lens focal length or f/stop when I switched between my Pentax 35mm film camera and my 500C Hasselblad.  I learned to think 35mm when I shot with the Pentax and 6x6 when I shot with the Hassey.

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