Quote:
Originally Posted by mbo
The focal length thing has me a bit confused. This is what I gather so far, please correct any misconceptions. .
|
Assuming were discussing your std Newtonian, dont stress it, get an F6 as its a good in between, F4 is more specalised and you probably wont find anything much more then F7 in most shops anyway. Yes the longer the focal ratio the easier to make. Yes an F8 16" would be good but somewhat difficult, not impossible, to use ( ladder probably, would be awesome on planets)
