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05-28-2008, 07:19 AM   #1
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Experiences of 18-250 Pentax or Tamron in Infrared?

Hi All

I am considering buying a 18-250 but I wondered if anyone had any experience of using either the Pentax or Tamron version for infrared on a K100D? I am interested to know if they suffer from 'hotspots'. I have a 12-24 Samsung that does (slightly), although I understand that the Pentax version does not. Any experiences gratefully received.


05-28-2008, 09:18 AM   #2
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Haven't tried the 18250 for IR, but the kit lens is pretty good for IR photos. It doesn't suffer any hotspots at all (at least I never saw any). The other good one is DA21. I know the DA1645 is pretty bad for IR, same goes to FA50, FA43 which my friend also tried. Had a short try w/ the DA50200, seems pretty good for IR too.
05-28-2008, 10:49 AM   #3
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Thanks Frank, a very comprehensive list! I have seen some nice stuff from the kit lens, and as it hovers around 30-40 here it is tempting. I decided that if I needed anything it was a lens with a bit of reach, but the added bonus of the useful 18mm. I have the 28-105 as well, which also works fine for IR, but I find the 28 too long and the 105 a touch short, so it is an uncomfortable lens for me in use.

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