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Sigma SD15 and IR Filter

Started 6 months ago | Discussions thread
Doppler9000 Senior Member • Posts: 1,573
Re: Sigma SD15 and IR Filter

xpatUSA wrote:

Jhnns wrote:

I just found out myself

Well done!

Strictly speaking, an "IR filter" is one that passes IR but blocks visible light.

The use of the word “filter” without more information is ambiguous.  In common usage, for example, the term “UV filter” refers to one that blocks UV.

The Sigma "dust-cover" does the opposite, so some call it a "UV/IR blocking filter".

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