Why a Refractor Telescope Is Your Best Option for Astrophotography
Comprehensive Telescopes Designs Guide
Sharpstar 140mm f/6.5 (910mm) Triplet APO (Dual ED) Astrograph Refractor #140PH - Camera Concepts & Telescope Solutions
Vixen Optics SD115S 115mm f/8 ED APO Refractor Telescope ES26148
How I fixed elongated stars (astigmatism and coma) in my FSQ-106ED - Experienced Deep Sky Imaging - Cloudy Nights
Sky-Watcher Evostar 100mm Doublet APO Refractor - Camera Concepts & Telescope Solutions
SVX180T - Stellarvue
William Optics Gold Super Zenithstar 81 f/6.9 Doublet APO Refractor OTA With Case & Free 32mm UniGuide - Rother Valley Optics Ltd
Astigmatism in a Triplet? - Refractors - Cloudy Nights
Sharpstar 61mm f/5.5 ED Triplet Apo Refractor Telescope #61EDPHII - Camera Concepts & Telescope Solutions
Commercial telescopes
APM 140mm DOUBLET APO REFRACTOR - User Reviews - Articles - Articles - Cloudy Nights
astronomical optics, part 4: optical aberrations
CGEM II RASA 8" Telescope – Mile High Astronomy
Stellarvue SVX102D
Tele Vue NP127is Nagler-Petzval APO Refractor Telescope OTA | High Point Scientific
REFRACTING TELESCOPE OBJECTIVE: DOUBLET ACHROMAT
William Optics GT81 81mm f/5.9 Apo Refractor - 20th Anniversary Edition - Blue # A-F81GTBU-VP20A
William Optics Gran Turismo 81 APO Refractor w Internal Focus Design and 32mm UniGuide - Red - Camera Concepts & Telescope Solutions
Stellarvue | SVX102T-R Premier Apochromatic Triplet Refractor (with Flattener & Dovetail Plate) – Cloud Break Optics
possible to fix on-axis astigmatism ? - Refractors - Cloudy Nights
Askar FMA180 Pro APO Refractor - Camera Concepts & Telescope Solutions
Altair Wave Series 80mm F6 Super ED Triplet APO | Land Sea & Sky
Astigmatism in Newton - Reflectors - Cloudy Nights
