f/1.8 on m4/3, ASP-C, FF; are they the same?

Started Nov 1, 2010 | Discussions thread
Senior MemberPosts: 2,235Gear list
Please stop confusing the normal people....
In reply to Peiasdf, Nov 1, 2010

Besides the physical stuff that is utterly irrelevant to making photos...

For exposure the f values are the same whatever camera system, sensor/film size and name of the model

So for a 20mm f1.7 on µ4/3 you will get the exact same picture from using the middle of a 24MP FF with a 20mm f1.7 lens attached... This is what is actually happening...

So shooting something that takes 1/60s with ISO100 on f1.7 on a FF camera will take 1/60s with f1.7 and ISO100 on any other camera, from your phone (if you could set aperture :D) over your compact, over your µ4/3 over a FF DSLR or a medium format camera (Hasselblad etc.) or one of those extreme scientific cameras with meter wide sensors... If the f value is 1.7 or 5.6 or anything else for that matter, you will need the same shutter time and ISO values...

The physical stuff about the amount of light recieved, the amount of light pr. micro sensor in the sensor array, moon phases and star positioning in Taurus is utterly irrelevant for exposing a photograph...

 MadsR's gear list:MadsR's gear list
Olympus PEN E-P1 Panasonic Lumix G 20mm F1.7 ASPH +2 more
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