Dumb ZOOM lens question


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Silverelf

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Dec 19, 2002
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#1
OK. For a zoom lens there are usually 2 Aperture readngs available on the lens right? Like the following

28-105MM f2.8-4

According to what I know, this means the max aperture I can get at 28MM is f2.8 and at 105MM is f4. However, what I do not know is whether I have to switch the aperture physically to f4 when I am using 105MM or will it automatically 'convert' the f2.8 to f4??

Thank you for bearing with such a stupid question. :D
 

clive

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Oct 9, 2002
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#5
if u r using the above stated lens on a maunal camera then when u want to shoot wide open at 105mm then u should turn the aperture ring on the lens to f4
 

#6
Originally posted by clive
if u r using the above stated lens on a maunal camera then when u want to shoot wide open at 105mm then u should turn the aperture ring on the lens to f4
No need to, when you zoom the thing to 105, the 2.8 mark becomes f/4 automatically.

Regards
CK
 

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