Filters - film and digital cameras
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John, I seem to remember that there is in that the sensitivity of eg CMOS sensors to the visible and IR/UV spectrum is different from film, I'll speak to one of my contacts at Lee filters to check exactly what the diference is but it may take me a day or two.
George
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OK, the glass filters produced by the likes of Lee and others have been altered to ensure that they are effective in to the IR part of the spectrum, I am told that a very few specialised digital sensors may and I stress may give slightly peculiar results if the filter does not have this characteristic, and this only applies to Neutral density filters and only in glass. The filters that you and I buy are identical for film and digital systems ( I assume you are not using glass in which case they will have been changed some years ago to have the characteristics I mention above)
I hope this helps, really doesn't seem to be anything to worry about. If you are experiencing specific problems, please come back to me and I will do my best to help or find out.
I hope this helps, really doesn't seem to be anything to worry about. If you are experiencing specific problems, please come back to me and I will do my best to help or find out.
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As an aside, the only time you might want to use glass (which is pretty damn expensive and doesn't come as a grad) is for eg water shots when you want to slow the effective shutter speed and still have a reasonably wide aperture as 2 polycarbonate filters may give some strange effects, whereas you can use multiple glass with no side issues.
joxby
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Polarising filters, two types, Linear and Circular, whilst not particular about whether they are on a film or a digital camera, they can effect AF.
A linear polariser will work fine on a manual focus camera, since there are not too many manual focus digital camera's (its a choice not a condition), they are generally associated with film, but can mess with af.
So if you are offered a polariser as part of a film "kit", and you intend to use it on an af camera, make sure its a circular polariser.
A linear polariser will work fine on a manual focus camera, since there are not too many manual focus digital camera's (its a choice not a condition), they are generally associated with film, but can mess with af.
So if you are offered a polariser as part of a film "kit", and you intend to use it on an af camera, make sure its a circular polariser.