Losmandy G8, Alt-Az AZ5 and Voyager, Telementor, AS80/1200, AS110/1650, Atik314L Pan 27-19; Delos 10; BGO 18-12.5-9; Pentax XF12-8.5 XO5.1-2.5; Siebert 36, TV Plossl 55; TMB SMC 16-7; Zeiss H-40-25-16, O-40-25-16-12.5-10-6-4; ATC 40K-20K-15E-8E; ATC Barlows 2x and 1.5x My astro page
Quote:...I store my telescopes at room temperature and I need to use full resolving power as quickly as possible.
Dave Jessie Outreach Events
Quote:What are the pros and cons between air-spaced and oil-spaced triplets? Does the oil effect more of a unison between the three elements, with an improvement noticed both visually and photographically?
Quote:mating the elements with oil, if done expertly, should result in a more finely-figured objective, ideally, yes?
Leica 8x20; Nikon Action 7x35; Vixen Apex Pro 8x42; Orion 15x63; Docter Nobilem 15x60
WO Megrez II 80 FD / APM 107mm f/6.5 / Mewlon 210 on DM-6 + Berlebach Planet
However, especially in the case of the latter, and for those who prefer minimal maintenance, a live, dynamic, moderate-to-high-powered view and a comparatively carefree pride in ownership, then remain with either a doublet or a triplet.
Quote: Quote:The pleasures and joys of observing the night sky have little to do with the particular equipment, some is a little better, some is a little worse, what is important is the sky and what I bring inside myself... Jon Agreed ! To see the incredible work of the greatest artist of all is often a religious experience for me . . . Me , I like my FS 128 flourite doublet . Showed color on Saturn for the first time . My TOA 130 triplet never did that .
Quote:The pleasures and joys of observing the night sky have little to do with the particular equipment, some is a little better, some is a little worse, what is important is the sky and what I bring inside myself... Jon
Quote:It is not that anyone should be afraid, or frightened; rather, one would simply exist in the realisation that they are not as mechanically-inclined as others.
CPC 9.25 TV 76, 102, NP 101 Unitron 114 Gibraltar mount Half Hitch Mk III SolarMax 90 .7A/B15 Coronado PST Eyepieces from the sublime to the ridiculous
Quote: None, for I bought an FS-102 instead, and for visual only. The NP-101 is a "photo-visual" petzval, with "photo" being its strength and intent per design. If I want low-powered views, there are perhaps oculars to accomplish same with the F/8. Besides, I have my eyes, my binoculars and a 6" f/5 Newtonian to enjoy low-powered views when desired.
“I am the only person to ever ace a 1951 USAF resolution test. My 'to observe' list says 'done'. I do not use charts or atlases when I starhop; men do not use maps. One of my sketches won an SBIG deep sky imaging contest. I am the life of star parties I have never attended. I never say anything looks like a faint fuzzy - not even a faint fuzzy. Pilots aim green laser pointers at me. Don Pensack proofreads my CN forum posts.” - The Most Interesting Astronomer in the Universe
Quote:As far as doublets being the best.. they have significant field curvature and less than perfect color correction though in the smaller sizes/slower focal ratios it may not be apparent. They may be the best compromise for certain observers, but triplets and Petzvals can provide more perfect views.
Quote:I guess he was "lucky" in his uniformed analysis. Having looked through several NP-101s as well as TV-101s and Gensises, I think he nailed it.
Just because someone can drive a car, doesn't mean they know squat about its capabilities. Take my mom, for example. She drives a Porsche Cayenne S. Now she couldn't tell you the first thing about its cornering limits, top speed, or how it stacks up in this regard to other vehicles. I've never driven her Porsche, but without ever having driven it, I do know more about its capabilities (as well as how to better utilize them) than she does. Were she to post on a performance automobile forum making claims about her Porsche's capabilities, she'd actually be the one trolling as she hasn't a real clue.
The moral of the story is this: use of an item, telescope, automobile or anything else, should not automatically be equated to being knowledgeable about the item. Likewise, the suggestion that someone who has not used that item cannot, nonetheless, have valid knowledge about it is preposterous. The scientists and engineers that built the space shuttle never flew it, but you can be darned sure that they know much more about the shuttle than any of the pilots.