Hi
When your'e using a zoom, the effective aperture shown in the CAMERA
display/viewfinder is RIGHT - The aperture ring on the camera doesn't "know"
how far you have zoomed. This occures when you use a zoom that does not have
the same aperture all the way through the zoom range (like the 3.5-5.6): 3.5
at 28mm, and 5.6 at 80mm. When using non TTL-flash this is a small problem.
That's one of the reasons, that zoom lenses with constant aperture often are
prefered!
Regards
Jens

-----Oprindelig meddelelse-----
Fra: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]På vegne af alexandre gaudeul
Sendt: 12. april 2002 22:40
Til: [EMAIL PROTECTED]
Emne: Who to believe ?


When my Pentax MZ-5n tells me I am at a given aperture, and the aperture
ring on my zoom is on another aperture, which aperture am I really using ?
The zoom is a Sigma 28-80 3.5-5.6 II Macro.
I give an example : I set the aperture ring on 5.6, the LED tells me I am
at 9.5 at 80mm, 8.0 at 50mm, 6.7 at 35mm and 5.6 at 28mm. The exposure time
changes accordingly.
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