A reminder for some memebers as to what the F stop is all about.

Started Jan 26, 2014 | Discussions thread
Great Bustard Forum Pro • Posts: 43,009

philosomatographer wrote:

...from this weekend, 35-100mm f/2.0 at f/2.0 (Olympus E-5).

Really, who the hell cares about all these equivalency arguments. There are such finer aspects of image quality and lens rendering that have a much greater impact on your photography. f/2.0 is more than sufficient for effective subject isolation even when the subject is enormous, and a couple of meters away.

Close Encounter

Would the "success" of that photo suffered if it had been instead taken at 83mm, 1/2000, f/2.8, ISO 200 with a 50-200 / 2.8-3.5 instead of the 83mm, 1/4000, f/2, ISO 200 with the 35-100 / 2 that you used?

If so, then that's why some choose larger formats.  If not, why not use the smaller, lighter, and less expensive zoom that has a much greater focal range?  Is it for the 35-50mm end of the zoom?

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