Im not sure I understand what your saying here. Is it that anything faster then f6 is rubish ? Im Kind of new to the astro world and this is the first time I have heard that f6 or faster is sh^t. Wish I would have known that before I bought an f5 dob. Thanks for leting us know. What scope would you buy?
P.S
I have a 16 inch full thickness primary that is going to start polishing soon. I may look in to this abit more.
Quote:
Originally Posted by Bassnut
It is generally also understood that a low f ratio is "easy" to image with and definitley "woose" territory. That is, "slow" f ratios, 9 and more, are what astrophograhpy is all about, hard and interesting. Zoomed in, is where its at.........man. I mean, aint that what telescopes are for  , no brainer.
Beware charitans that use "fast" f6 or less scopes, you will lose your self in boring done-that widefield rubbish that pollutes our LCDs and dillutes the pure pursuit that is true "deep sky" astrophotography  |