|
Frank;
You can still shoot bright
planetaries with the moon up and maybe some bright globulars, but not a lot more
without filters. A Lumicon Hydrogen Alpha filter blocks most moonlight, but not
all films work well this way. Hypered tech pan loves the Ha filter, if you have
a fast enough focal ratio. I have also seen some good results with Kodak E200
slide film. When the image is scanned, convert it to grayscale, unless you find
beauty in red nebulas surrounded by red stars..... Either technique gives you
luminance channels that can be used in a future colour LRGB stack.
I have a bit of information on
using the filters here: http://members.shaw.ca/jmirtle/ha.htm
John Mirtle
Calgary, Ab. Canada
|