Focusing problem with Powershot S1 and filters

Hi,
I recently bought a lens adapter tube and some filters for my Powershot S1. The problem I've noticed is that the camera has a hard time focusing when the filters are on. Even if I manually adjust the focus, it just doesn't work right. The polarizing filter seems to give it the most problems. Does anyone have any idea what this might be? I was gonna ask in the Canon Powershot group, but there is no activity over there.

Thanks,
Eric

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Replies to This Discussion

Permalink Reply by Peter Salas on January 13, 2010 at 11:26am

I believe it is because when you apply a filter, specifically the polarizer, you lose 1.5 stops of light. The same effect happens to me in low light situations on my camera. Try bumping up your ISO to see if this alleviates the problem.

Permalink Reply by Eric Welsch on January 14, 2010 at 5:55am