I bought this telescope new and have not used it a great deal. This Jason Model 313 "Discoverer" equatorial mount refracting telescope with sighting scope is in excellent condition complete with all eyepieces in excellent condition, parts, and the original box. Science & Mathematics Astronomy & Space. Next . Jason 313 Discoverer telescope? Anyone know any information on this telescope? I saw it for 50 bucks at a thrift store and wondering if it is a good but for a first time telescope. Jason Discover 454 Telescope Model #313? VINTAGE JASON TELESCOPE Model 313 Discoverer - $233.79. Vintage Jason telescope model 313 Discoverer in very good condition. 183711488999 Find best value and selection for your Jason-Discoverer-Telescope-Model-313-Rare- search on eBay. World's leading marketplace. I just paid $75 for a used Jason 60mm, f/15.2 equatorial refractor Model 313 Discoverer - and after first light this morning I would declare the objective lens excellent, if not exceptional, and the mechanics are a cut above an awful lot of stuff sold today to beginners - or for that matter, some stuff sold 30-50 years ago as well. Find great deals on eBay for jason telescope. Shop with confidence. Skip to main content. Vintage Jason Telescope Model 313 Discoverer. Pre-owned. AU $246.36. From United States. Vintage Jason 400x Model 411 Astronomical Telescope In The Box (Missing peices) Pre-owned. AU $45.75. We are your source for astronomy telescopes, eyepieces, astroimaging cameras and imaging accesories, telescope mounts, & more! Jason Discoverer 454 ~ Model 313 Discoverer Astronomical Telescope w/Extra Attachments Jason Model 313 "Discoverer" equatorial mount refracting telescope with sighting scope is in GREAT shape with eyepieces and extra parts. Included with this telescope are 2 eyepieces (SR4and Ke21mm), 2X Barlow lens and plate. Nice addition who collect Jason's telescope collection.This has the 4mm and 21 mm lenses. Review (mpn:313-with for sal