Lens Advice

I have the Sigma 18-200, I origionally bought this over the Tamron 18-250 because the Sigma focussed faster. Since owning it for some time, first on a K10D where it did stay on the camera most of the time; it also worked very well with the Kenro 1.5x conveter.

Since getting the K7, it has only been used as a travel lens (when flying only!) as I find that it is just not sharp enough for any other use, took it to Florida with the 16-50DA* for the best of both worlds. Still a very good all round lens, but not really up to the sensor resolution, great for 7x5 prints though.

I have no experiance with the 18-250 or the 18-270!

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Bodies: K5IIs, K7, MZ5n, LX, MV
Lenses: DA*16-50, DA18-55WR, DA18-135, DAL35, M50 F2, A50 f1.4, FA50 f1.4, DA*50-135, DA55-300, Tamron 70-300, DFA 100 WR Macro, M135 f3.5, Sigma 120-400 APO DG HSM, Tokina 500 f8.0
Flash: Metz 58, Metz 48
Accessories: BG4, Pentax right angle finder, Pentax mirror adaptor lens, O-ME53 Viewfinder Loupe
Auto 110 System: Auto 110, Winder, 18mm, 24mm, 50mm, 70mm, 20-40mm, AF100P, 1.7x telecon

I also have the 18-200 and have some 18x12 prints off it that look razor-sharp to me* though there is a bit of CA if you peer closely. It might be worth trying one out first to make sure you get a good one...

Examples (at 100% size):

http://www.flickr.com/photos/pm107/5343285367/sizes/o/
http://www.flickr.com/photos/pm107/3550042048/sizes/o/
http://www.flickr.com/photos/pm107/3970203924/sizes/o/
http://www.flickr.com/photos/pm107/3593738048/sizes/o/

[*Of course, as newcomer I might just be a bit less discerning!]

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