Re: any such thing as ultraviolet film?

Don't forget, You'll need a lens that has the UV offsets. You focus,
check the numbers on the focus ring and then adjust to the same number on
the UV scale. Shorter wavelengths have have differnt focal length...




"Marvin" <physchem@xxxxxxxxxx> wrote in message
news:11dieecbihutuf6@xxxxxxxxxxxxxxxxxxxxx
> scrunchy2k@xxxxxxxxx wrote:
>> Mark W. Oots (no spam) wrote:
>>
>>
>>>Actually, "normal" color film has quite a bit of sensitivity to UV light,
>>>thus the need for a UV/Haze filter to reduce haze and increase contrast
>>>at
>>>long distances...Of course the film also sees visible light. So in
>>>effect,
>>>No!
>>
>>
>> Now for the obvious question:
>>
>> Is there a filter to filter out visible light but let
>> the UV pass on to the color film?
>>
> A short-pass filter is possible. And you would need a lens that is either
> made only from mirrors, or one that is made from UV-transmitting materials
> like quartz and fluorite.


.

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