Kenneth Waller
http://www.pentaxphotogallery.com/kennethwaller

----- Original Message ----- From: "paul stenquist" <pnstenqu...@comcast.net>
Subject: Re: So, 60-250 F4 or a 3rd party 70-200 2.8?


I have three SDM lenses, with more than 20,000 exposures on them. No problems with SDM. Great image quality and performance from all of them.
Paul

And on the other side of that coin, I have 8 Pentax lenses and only one has the SDM feature. Guess which one currently isn't auto focusing - it started acting up after a few hundred exposures !

And I actually miss the noise of the lens focusing that is prevalent on the screw drives.


On Dec 19, 2010, at 4:36 AM, Boris Liberman wrote:

Cory, for whatever it is worth, I tried Bob's 60-250 in Chicago briefly and was very impressed with its ergonomics. The IQ is second to none as many examples on this list show.

Still, I recently shot a portrait of a co-worker across the room with Nikon 70-200/2.8 (letter soup omitted due to lack of memory) with D300. I used 200 mm and f/2.8 to isolate the subject. Was very pleasantly surprised.

And finally, I've met two days ago yet another Pentaxian friend who bout 17-70/4 SDM not a long ago and who also has a modern manual focus zoom lens on his hands now.

Please don't misunderstand me, but I'd rather steer away from SDM lenses.

Boris

P.S. Without knowing too much details, two lenses come to mind: Sigma 100-300/4 and Tamron 70-200/2.8. One of my friends has Tamron for Canon mount. It is honking big and appropriately heavy. But it yields good pictures...

On 12/18/2010 1:39 AM, Cory Waters wrote:
Thinking about surprising Santa this year and stuffing my own stocking.
I'd likely use the lens for youth soccer (futball), nature, and auto
racing shots.
I know the 2.8 would be nice (faster is ALWAYS better, right?)
The Pentax lens has a bit more reach in either direction. My current
lens for shooting these soccer games is the DA 50-200. I get decent
shots but but they mostly need cropping. The extra 50mm would be nice
and I'd be moving from 5.6 to F4 so that's better.
The Pentax would have better integration with my K10 and future bodies.
Do any of the 3rd party lenses work with the supersonic focus motor?

The Pentax lens is more than a little bit more money though...

What to do?

Cory


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