[Klaus]

[quote name='Brightcolours' timestamp='1284555017' post='2797']

How can you say the Canon 70-200mm f4 L IS USM is hardly comparable, when I just now showed just how comparable it is?

[/quote]



Yeah, how could I dare ...



[quote name='Brightcolours' timestamp='1284555017' post='2797']

The Canon lens is the same size (actually a bit smaller), has comparable tele reach on APS-C, weights less, is weather sealed and offers IS, and it a bit cheaper.

[/quote]



C70-200 on EF-S = "112-320mm f/6.4" (2.84x)

P60-250 on P = "90-375mm f/5.6" (4.17x) (althouth that's not 100% correct according to the "official" Pentax crop factor)



Now what was your question again ?





[quote name='Brightcolours' timestamp='1284555017' post='2797']

The other Pentax lenses you mention...

50-135... Tokina 50-135mm f2.8 and Sigma 50-150mm f2.8 are available for both Canon and Nikon APS-C.

10-17mm fisheye... Tokina 10-17mm is available for both Canon and Nikon APS-C.

17-70 f4. Nikon has a very comparable 16-85mm f3.5-5.6 VR. Canon has a very comparable 15-85mm f3.5-5.6 IS. If those are not to one's liking, Sigma has a 17-70mm f2.8-4 OS.

[/quote]



Right, thank you for the confirmation than none of these are available from the original manufacturers.