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08-19-2010, 08:59 PM   #46
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QuoteOriginally posted by jms698 Quote
There was also talk of a 150mm f/2.8 Limited somewhere on this forum.
that was probably Sigma deciding to make 150/2.8 macro in K mount

08-19-2010, 09:03 PM   #47
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QuoteOriginally posted by deejjjaaaa Quote
that was probably Sigma deciding to make 150/2.8 macro in K mount
I posted in that thread. I would buy one of those if Sigma decided to modify that lens to feature one with a K mount but someone said they are not going to do it.

http://www.flickr.com/photos/andrewdalerichardson
08-20-2010, 08:26 AM   #48
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QuoteOriginally posted by traderdrew Quote
I posted in that thread. I would buy one of those if Sigma decided to modify that lens to feature one with a K mount but someone said they are not going to do it.
Sigma does not mind to make K mount at all, but it minds to provide 2 entirely different designs of AF mechanism for lens that it thinks will not sell in mass quantities...

that was the reason why K-mount was not initially supported because at the moment when the lens was designed and production runs were done Pentax had zero SDM cameras and Sigma 150/2.8 was a ring type HSM AF design - remember that was in 2004 ( Three new lenses from Sigma: Digital Photography Review ) !!!

So if there will be any upgrade to Sigma 150/2.8 we shall see K mount supported as Pentax will have no cameras w/o SDM by that time...

other than that it is a star performer, FF, 9 blades, ring type HSM, low cost, etc

http://www.sigmaphoto.com/shop/150mm-f28-ex-apo-dg-hsm-macro-sigma

http://www.photozone.de/nikon--nikkor-aps-c-lens-tests/304-sigma-af-150mm-f2...w--test-report
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