Quote:
Originally Posted by traveller
You are right peter.
Peter Tan sells replacement filters separately as well as modding them. The only advantage of an ACF filter is that it will preserve your refractive index (plus acting as a dust shield). A simple filter removal is just as good (most dslr sensors have a clear glass cemented onto the sensor and not just a naked sensor).
If you plan to do everyday photography with your modded camera, then get the replacement filter. But if you want it for astro photos only (or don't mind manual focusing each shot), then a filter removal is just as good.
Cheers
Bo
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That's interesting.
I had assumed (wongly it would seem) that without a filter, your sensor would be open to the entire spectrum and therefore be prone to excessive sky-glow effects - the Baader UV/IR cut filters (the ACF varieties) have a very sharp gradient at both ends and extend the red end only enough to capture the bulk of Ha. If anyone has any more info on this, please post. I'm heading to Google now to see what I can find there.
Peter