|
Hi John,
Yes, I think I saw that page a long time ago..
However it is not quite what I need, Canon (and others) have two filters, and this is the response of both filters in place, while I need responses od individual filters, especially the first one (which looks transparent, but it also IR cut, and it seems it affects Sii line at 672 nm).
Anyway, I bookmarked this page, just in case - it could be useful in the future :-)
Thanks again for the effort!
|