Can someone explain this please?

13 years 5 months ago #4014 by NikkiG
Why do some lenses say they have a fixed "f" like 2.8 and others have a range like f3.5-5.6? The fixed I understand, but how does the one with the range work?


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13 years 5 months ago #4021 by Grenoblik
A lens that is indicating a range like that is a zoom where the maximum aperture varies from the wide end to the long end of the zoom range. It is common for zooms, particularly less expensive zooms, to let in less light as they are zoomed out to longer focal lengths.

Hope that helps.


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