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03-19-2008, 01:07 AM   #1
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Multisegment metering

Hello,

I am a k100d Super user, and I see in the users manual (p 136) that "center-weighted" metering mode is automatically selected even if you have selected multi-segment when using a lens other than DA, D FA, FA J, FA , F or A.

Do you know the behavior with non Pentax lenses (Sigma, Tamron, etc)

Thanks

04-14-2008, 09:00 PM   #2
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A bump because I don't know the answer either, and it's been almost a month.

Hopefully someone can tell us both.

Cheers.
04-14-2008, 09:31 PM   #3
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I believe it essentially does not work on M style lenses. It will work with non-Pentax A-style or newer lenses though - at least on my Sigmas.
04-14-2008, 09:56 PM   #4
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multi-segment is fine on my Tamron 28-200 XR IF

04-14-2008, 10:01 PM   #5
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I have DG versions for Sigma and Di versions for Tamron - they work fine with the K100D on Multi-segment metering and also Autofocus.

I think its the same situation - for older film-era lenses, if they are not Auto aperture compatible with the Digital body, it will default to center-weighted metering.

As to which specific lenses are compatible - really needs input from users who have experienced it.
04-14-2008, 10:26 PM   #6
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QuoteOriginally posted by fontku Quote
Hello,

I am a k100d Super user, and I see in the users manual (p 136) that "center-weighted" metering mode is automatically selected even if you have selected multi-segment when using a lens other than DA, D FA, FA J, FA , F or A.

Do you know the behavior with non Pentax lenses (Sigma, Tamron, etc)

Thanks
Generally speaking, if the lens has an A setting on the aperture ring and the electrical contacts on the mount that tell the camera what the lens is, where it is focused, and what aperture is set, the multi segment metering will work fine. Look for at least one contact and four other spaces that are plastic. More contacts is not a problem, but fewer than five positions might be. My A 70-210 has one contact and four plastic insulating fillers, for example, and is good to go for multi segment metering.
04-15-2008, 12:02 AM   #7
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Depends on type of the lens. If it's auto (so if there's A position on aperture ring) lens, then you can use multi segment metering, and it'll work. On any lenses without A setting the metering will be automaticly as centerweighted...
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