Crop Factor, Low Light and Aperture with m4/3 lenses?

Started Jun 15, 2014 | Discussions thread
Ulric Veteran Member • Posts: 4,558
Re: Crop Factor, Low Light and Aperture with m4/3 lenses?

0MitchAG wrote:

Another thing that hasn't been mentioned is that only the FoV is cropped, perspective compression and distortion remain unchanged as they are dependant on focal length. For 50mm on FF, you still need a 50mm on m43, you will just have to be a bit further back. Or you can remain the same distance using a 25mm, but the photos are ultimately different.

Not so. What Great Bustard wrote in the post above yours is correct: a picture taken with 50 mm on FF looks like a picture taken with 25 mm on m43 from the same spot.

Here are three pictures to illustrate the point, all taken on m43 but cropped to give 2x, 4x and 8x "crop factors" relative to FF. Apertures were also adjusted accordingly, so dof is very similar.

 Ulric's gear list:Ulric's gear list
Panasonic Lumix DMC-GF3 Olympus OM-D E-M5 Panasonic Lumix DMC-GM1 Olympus PEN-F Panasonic Lumix G 20mm F1.7 ASPH +13 more
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