Quote:
Originally Posted by Zuts
Hi,
I am not sure if i am reading the graph correctly but the following suggests that an unmodded 40D has a much worse response to Ha than an unmodded 350D.
Less than 10% Ha is let through? If this is true then its like shooting at F50 for Ha so I would agree with bassnut and say mod it.
http://www.astrosurf.org/buil/eos40d2/filter.htm
Paul
Edit.. Actually the graph is relative response but i still reckon mod it  |
Babel Fished the website , makes for interesting reading .
http://babelfish.yahoo.com/translate...rUrl=Translate
-a longer exposure would bring out more nebulosity on the unmodded 40D in fig13.
I'll hold of for a while I think when I get my 40D.