Thread: Rho Ophiuchi widefield Proline 16803 165mm Pentax
View Single Post
  #27  
Old 28-10-2011, 11:38 PM
Ross G
Registered User

Ross G is offline 		 
Join Date: Apr 2007
Location: Cherrybrook, NSW
Posts: 5,013
Thanks Greg,

I felt it couldn't be that easy.

How about shooting in narrowband?

Would photo through a Ha filter through an achromat be the same as one through an equivalent apo?


Ross.
Reply With Quote