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Hans,
Is this filter useful for unmodified Canon cameras - that still have the factory standard IR filter - the one that cuts out most of the Hydrogen alpha light?
Can you describe what is does for unmodified Canon cameras and how well it does it? For instance if I shoot the Tarantula today with my Canon 400D - the result is mostly blue / green from the Oxygen - I lose nearly all the red due to the Canon's native IR filter. Could this filter help me at all - or does it only help at the margins by reducing skyglow (something that my Hutech IDAS filter already does reasonablly well).
Also does installing the filter preserve colour fidelity on all other wavelengths? So it passes light above its cut off without shifting the colour balances around!
Most interested in your reply!
Matt
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