Thread: Adapters for other camera lenses to Canon Body.
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Old 13-12-2016, 11:59 AM
JA
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Join Date: Oct 2016
Location: Melbourne, Australia
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Quote:
Originally Posted by Jasp05 View Post
Now my question is this. The lens is 18-200mm f3.5 - 6.3. If I hold the aperture wide open and zoom the lens to 200mm. What is the f# it will be operating at? is it going to be f3.5?
Hi Jasp,

This is a variable aperture lens and typical of very large zoom ratio lenses (11x in the case of your 18-200), the lens will be f3.5@18mm and f6.3@200mm and ascending f numbers in between these extremes, as indicated in the lens marking.

Best
JA
Last edited by JA; 14-12-2016 at 07:49 AM. Reason: typo
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