Hi Wayne,

Wayne J. Cosshall wrote:

Yes, the R72 and RM72 are the same filter. The R72 still lets in a
little red light, whilst the RM90 completely cuts off the visible. This
gives a more intense IR effect but also longer exposure times. I'd

What kind of exposure times are we looking at?

Thanks re the images on my site. Now I have the modified 350D I will be
expanding the range of subjects I shoot in IR, which I am looking
forward too.

On an expanding note: Has anyone experimented with the other end of
the spectrum - the ultraviolet? In a previous life, I did some arc
welding and the heavy duty UV screens could produce interesting
effectsg

Best regards,

Arnor Baldvinsson
San Antonio, Texas