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10-27-2011, 02:22 AM   #1
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Blue filter sorts out KR front focusing problem?

Here's a thought - the KR has been widely reported to have a front focusing problem in Tungsten light - this suggests that it has to with wave length sensitivity. Has anyone used a blue filter over the lens to correct the excessive yellow of tungsten lighting before the light reaches the AF module in the camera?


10-27-2011, 03:05 AM   #2
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I was just reading something else that made me wonder if like a Wratten 82C would help with this, as its purpose seems to be shooting with daylight WB under incandescent lights. If anyone has one of these, it'd make for a very interesting test.
10-27-2011, 04:53 AM   #3
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From memory (I had a Kx some time ago, suffering from the same kind of problem), the problem arise in low-light situations only. A well-lit tungsten scene would be properly focused.
Thus, using a filter in such a situation would only further degrade the AF behavior...

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