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Forum: Pentax DSLR Discussion
09-10-2008, 10:23 AM
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I was reading penta-club.ru and the topic there ( Гуляние автофокуса в К20Д - Форумы Пента-клуба ) reminded me that
solution probably exists... not cheap one - but...
B+W #486 filters ... they cut UV __AND__ IR !!! but they cost a lot... like ~$170 (or so) for 72mm... or ~$140 (or so) for 49mm... but then your
tungsten IR spectrum will be almost eliminated... :confused:
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Forum: Pentax DSLR Discussion
09-09-2008, 11:30 AM
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because Sigma did not get a license from Pentax... so Pentax will not supply Sigma with ID#s for their lenses... Sigma has to reuse existing ID#s.
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Forum: Pentax DSLR Discussion
09-09-2008, 11:11 AM
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the best solution (but not the cheapest) will be to put the 2nd sensor (less resolution - bigger cells to catch faint light because most of it will be reflected by mirror towards pentaprism/mirror to go in viewfinder) in place of AF module and use contrast detecting AF (like in PS cameras)...
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Forum: Pentax DSLR Discussion
09-09-2008, 07:51 AM
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remember - BF/FF depends on specific camera/lens combo and BF/FF depends on daylight/tungsten light... so you if you are going to test
your camera/lens combo - do not forget to test it under both conditions
and unfortunately Pentax does not provide any way to detect/store different adjustments for both conditions at the same time... for example
my Sigma 24-135/2.8-4.5 does not require any adjustments for tungsten, but it does for daylight, but other Sigmas behave opposite way... so in many (some) cases you need to remember to change the adjustment yourself.
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