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06-26-2007, 10:45 AM   #1
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will K100D support new SDM lenses?

Hi,
I've just had little read about new DA* line lenses with SDM, and I found somewhere thata as of now only K10D will support them (I mean the SDM aspect of them). Is that true? Does it mean that those of us owning K100Ds or *ists won't be able to enjoy faster focusing?

06-26-2007, 10:55 AM   #2
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correct. that's one of the selling points of the k10d.
06-26-2007, 11:09 AM   #3
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as mentioned. k100d will not support sdm.

The new k200d (-speculation-with a 10mpix sensor??-speculation-) will support sdm though.

I believe its because the k100d lacks the physical contacts so this cant be added with a firmware update, rather with a camera model update (k200d)
06-26-2007, 12:50 PM   #4
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QuoteOriginally posted by and Quote
The new k200d (-speculation-with a 10mpix sensor??-speculation-) will support sdm though.
Have you been having lunch with Pentax too? I'd like to know if anything about the "k200d" (including its existence) isn't speculation.

06-26-2007, 01:02 PM   #5
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QuoteOriginally posted by ZaphodB Quote
Have you been having lunch with Pentax too? I'd like to know if anything about the "k200d" (including its existence) isn't speculation.
pure speculation from my side im afraid.

but certain things should be for sure:
1. there will be one
2. it will support sdm, because pentax will increasingly use this in their new lenses.
06-26-2007, 01:03 PM   #6
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QuoteOriginally posted by attack11 Quote
correct. that's one of the selling points of the k10d.
does it mean that AF and all other functions will work OK, just the SDM motor will be dead weight if the lens will be coupled with K100D or *ist, correct?
so then the only advantage will be better (if) optical performance of the lens, right?
06-26-2007, 01:14 PM   #7
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You are correct that on the K100d, the new SDM lenses will not utilise the SDM motor, but will retain "traditional" autofocus on the K100d, because they will also have the "screwdriver" AF system controlled by the camera body. Unlike Nikon (who can get away with it because their faithful users are ready to accept crippled/limited functions as a feature), Pentax is trying to keep full compatibility and functionality where possible, and I hope they continue to do so.

I guess you're right that without SDM the new lens' "only" benefit of using them on a K100d is better optical performance, but consider two things: Firstly, If you want a fast zoom in this range you have to either buy one of these or try to get hold of a Sigma. Second, the quality of these lenses is likely to be very high. It's not like the optical performance is a minor factor.
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