Best 4" APOPosted By Ed Ashton |
I'm going to put in a plug for a used TV 102. It's not exactly "fast" at F/8.6 but can achieve a 3-degree field with a 55mm plossl eyepiece, and an F/6.9 field flattener is available for photography. It's lightweight, not bulky, excellent on planets and double stars, and I've seen them on Astromart for as little as $1650...a lot of bang for the buck, IMO!