Quote: (Originally Posted by
keith_d)
Hi,
I'm only an armchair specialist, having not tried this myself. But, from what I've read digital cameras with the i.r. filter removed are sensitive to near infrared down to 1100 or 1200 nm.
Unfortunately, water is qute a good absorber in this region of the spectrum. Approximately 10 times better than red light. So you'll probably only be able to get usable image close to the surface on sunny days.
Just my thoughts,
Keith.
your right,I heard this sometime ago.I have been told by the experts that
with a digital camera set up for IR and the right weather conditions you might get to 5-7 meters below surface before the wave length is absorbed,
and possible more with a film set-up. But this is only hear say, as I have not
seen anything yet from either media source.So until I can get to try this out
myself, or someone else can share there work with us, we'll keep looking.
thanks for you input.
all the best.