Quote:
Originally Posted by mswhin63
Nice images Derek 
What is the focal length of the scope you used to achieve this? I want to buy and ERF and filter but the I have an F5 which may not work. |
The Ha scope is F23 the 100mm is F7 for the White light Shots.As for ERFs and rear mounted filters you generally have to get your scope to F20+.I'm actually considering a front mounted filter and a rear blocking filter such as those made by Lunt and Coronado which are more compatable with the lower F ratios.There are others here who use various setups and would have more experience than me and could also help you in your descision good luck.