Folded refractor
WebMar 1, 2001 · Combining the best features of reflecting and refracting telescopes, the folded refractor is an instrument deserving more attention. ERNIE PFANNENSCHMIDT is a … WebThe Offset Folded Refractor is contained in a tube 10 inches in diameter and 36 inches long; still pretty short and squat but slightly thinner and a bit more compact. The following … Adjusting a Folded Refractor. I am not sure if there is any one perfect, easiest way … Double Arm Barn Door Drive » Folded Refractor » 17 Inch Dobsonian » Mini … The focuser at the top of the picture is from a Unitron 131C, 75mm folded refractor. … Unitron 131C 75mm f/15 folded refractor. My ultimate favorite is the 160. Wow, … I built a folded 4 inch more than 20 years ago using only woodworking techniques. … My name Is Dave Trott. I hope you like these pages about telescopes. I am a … Six-Inch Binoculars » Big Binoculars » Giant Binoculars » I am working on a page devoted to my six inch folded refractor. I could not have … The old Double Arm Drive invention is still alive and kicking after all these years. … I have uploaded a couple of Unitron Video Tours. One is an overview of the 3 inch …
Folded refractor
Did you know?
WebJul 20, 2024 · For people looking for a compact telescope with the visual performance of a large aperture refractor, the Maksutov-Cassegrains are the best choice. Another. ... a Mak telescope, is a member of the catadioptric telescope family and uses both mirrors and lenses in its folded optical design. Maksutov-Cassegrain telescopes are very popular ... WebI followed Norm Remer’s excellent book, Making a Refractor Telescope and felt like Norm was my constant companion on the journey. I also referred frequently to Roger Ceragioli’s Refractor Construction Page . The instruction and …
WebTom Lumenello's 5-inch Folded Refractor. Folded Refractor: A truss tube Dobsonian on the observing field. Trussed Dob: Looking west from Breezy Hill to the Green Mountians. Western View: Photos by Rich Sanderson. Peter Schultz speaks at the Lunar Morphology Workshop. Peter Schultz: WebThis refractor is an achromat which normally would not be suitable for photography. Due to it's large focal ratio (f15) and long focal length(2276mm) this scope is a superb planetary performer. This is a photo of Saturn taken with a Celestron Neximager, a webcam-based imaging camera. This photo is a stack of 1000 frames in Registax.
WebI decided on a classic achromatic refractor and I wanted to experiment with building a folded refractor. My initial design was influenced by the classic look of the Unitron 131C. I ordered an Istar 6" f/15 lens, along with a … Web4" Folded Refractor by Dave; 4" Refractor by Tom; VSC 100mm f/13 by Mel; 5" Bent Rich Field Refractor by Robert; 5" f/12 Plywood Refractor by Andy; VSC 127mm f/9.4 by Mel; 6" f/15 Refractor Project by James; 6" Refractor by Dick* 6" Refractor by James; 6" Plywood D&G by Andy; 6" f/15 Refractor by Robert; 6" Oiled Doublet by Jan; 7" Folded Istar ...
WebUnitron 75mm f/16 folded refractor (model 131-C) APM 152mm F/7.9 Aachromatic refractor - Solar telescope APM 152mm F/7.9 refractor APM 152mm F/7.9 refractor APM 152mm F/7.9 refractor APM 152mm F/7.9 refractor Baader ERF 160mm, Baader astrosolar 3.8 (ND) APM 152mm F/7.9 APO refractor (doublet ED) - Solar telescope
WebFind many great new & used options and get the best deals for 2024 BOWMAN CHROME JOSHUA WALKER REFRACTOR 1ST YR RC WASHINGTON at the best online prices … hollis sauceWebProduct Description: These Folded Optical Tube Assemblies provide both high resolution imaging performance and the good light grasp of a 10 inch aperture. Because the tubes … hollis school district calendarhollis school districtWebPrepare the 9” Folded Refractor for Observing • Remove the telescope’s protective covers. à ***FUTURE*** Remove the telescope’s protective cover. à ***FUTURE*** Remove the protective skirt telescope covering the mount. à Note: Possibly install a hook inside the enclosure to hang the protective covers while the FRO is in use. hollis scuba equipment corporate headquartersWebThe tricky part is the FIRST fold. The metal rim should NOT be twisted! hollis school district 328WebRefractors, Objective lenses, optical assembly units, focusers and more are available. REVIEWS AND CUSTOMERS COMMENTS! ... "This is the sixth folded refractor I have built. (using a 5" F/15 D&G lens) In over six decades of observing, both as an amateur and a professional astronomer, I have only once used a 5-inch glass as good as this one ... hollis scuba shirtWebFeb 25, 2024 · eggplant wrote: In the telescope world, there is such a thing known as a 'folded refractor', where a series of flat mirrors are used with a long focus achromat (e.g. 1000mm focal length - 1000mm flange distance!) to reduce it's overall physical length. Whilst the examples online are quite long, there is nothing stopping you getting creative like this: hollis scuba