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05-17-2010, 12:02 PM   #1
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[langtitle=da]Forskel p Pentax A og M Obektiv?[/langtitle]

Hej.

Jeg har et Pentax K10D og overvejer at købe et brugt analogt 50 mm. objektiv.

Jeg har set på et Pentax - M 1:1.7 50mm og et Pentax - A 1:1.7 50mm.

Er der nogen som kan forklare hvad forskellen på A og M er?

05-17-2010, 12:10 PM   #2
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I would suggest getting the A lens. The optics are probably the same on both, but the difference is in that cameras control of the aperature setting. With the A lens, your K10D will recognize the aperature & adjust metering accordingly. It won't recognized the change in aperature with the M lens.
05-17-2010, 12:20 PM   #3
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See here: Pentax K-Mount Lenses Explained

The essential difference is that the A version allows for auto aperture control wile the M doesn't; both lenses are manual focus.

Adam
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05-17-2010, 12:33 PM   #4
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effectively with the A lens you can do everything the same as any modern lens except for no AF.
With the M lens it's a little more complicated than that and I'll leave the explanations for someone else for I suspect I will confuse you

05-17-2010, 12:42 PM   #5
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Tak for svarene :-) Jeg vil g efter en A-er
05-18-2010, 11:44 AM   #6
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I have both.
Big difference: multi-pattern-metering versus centre-weigth.
Small difference: better coating; tiny bit sharper.
Both little nice lenses, mechanical and optical.
Since I don't like to change body-adjustments all the time I use the m50 in combination
with other m and K lenses when time is not an issue and the A in combination with the
other AE lenses.
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