Size comparison of FE 4/2470 on A7 vs Olympus 12-40 f2.8 on GX7

Started Feb 6, 2014 | Discussions thread
Erik Magnuson Forum Pro • Posts: 12,247
Re: apples and oranges

LTZ470 wrote:

Lol...The 12-40 at f/2.8 (24-80 w f/5.6 DOF ONLY) has a much faster shutter speed than 24-70 f/4,

LOL... lenses don't have shutter speeds unless they also have shutters.  Photographers choose shutter speeds and camera ISO settings based on their output needs.   You can use a higher shutter speed with the 24-70 and still get similar mid-tone noise.

How about a FZ200 24-600mm EFL f/2.8 with a faster shutter speed than the 24-70 f/4 and much better for birding and close ups and moon shots?

You do know basic algebra right?  What's the "f" in f/2.8 stand for? If you multiply the "f" on one side, you have to multiply the "f" on the other side... LOL.

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