Forum: Pentax K-1 & K-1 II
10-01-2018, 07:52 AM
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I've seen it before on my K-3... See my post HERE...
It seems to be dependent on a combination of specific camera plus specific lens, with both focal length and shutter speed inter-related. Whilst I have no hard evidence, I suspect it might even vary by individual copies of cameras and lenses, as any component manufacturing tolerances can influence weight and the effects of mechanical movement...
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