"Life is too short to miss the beauty of heavens."
Quote:Being 100% unrealistic:A binocular telescope consisting of two NP-101s...Jon
Celestron CPC 1100 Televue 102iis Televue 76 Canon 6D - Canon T1i Celestron CGEM Vortex 10x42 Viper Binoculars
Quote:I have a Deltar, the IF version of the widefield prewar 8 x 40 with tapered prism ( uncoated). You would prefer the 8 x 50B Super Nobilem from DDR Carl Zeiss Jena, which I missed buying when they were available, and only saw about six years ago in a massive collector's (RIP) hoard. The Deltar field, while very wide, and good in the center, deteriorates with increasing angle before modern eyepiece designs. The Deltar/Deltarem have an orthoscopic 4-element eyepiece. The inner surface of the eyelens is an asphere. The design was by Albert Koenig. A very similar eyepiece is in the WW II Zeiss 25 x 100 with 60 deg inclination.There is a Deltar aberration plot , and for the cited 8 x 50B Nobilem, (in Zemax(?)What is the program?) At the Albrecht Koehler website www.AlbrechtKoehler.deThe 65 deg Nikon 10 x 70, from the 1970s, did not have modern multicoatings , and was less sharp than the standard field 10 x 70's which came later, and the 7 x 50 Fuji Meibo which I had at the same time on the boat, about ten each, new . Those 7 x 50 ( no rubber "armor" nor any brittle glue)cost about $70,maybe $100, IIRC. The 65 deg was heavy ( that is OK by me), and had cold metal on the nose, as I recall. My specimen, long gone, cost me under $200 in Yokohama in 1975. I used it to watch the albatrosses en route to San Pedro on American President lines, as an unpaid oceanographic temperature monitoring technician. A lady had one for sale at RTMC a few years ago. I was tempted, but passed on it, because of duplication of function at that magnification and aperture range, and no neck relief for astro with a straight binoc, without a p-mount, and they would be heavy for prolonged use handheld while one is resting on a recliner. That 10 x 70 has noticeably less color error than the WW II Nikko wide field (uncoated) 10 x 70, but more than the cited Fuji Meibo 7 x 50. It would be welcome if Nikon were to re-offer that model, but improved as suggested.
Glenn in Boulder Starsplitter Dob 12.5" F6 with NGC Max Digital Setting Circles Celestron C8, CG5 mount, Stellarvue 2" diagonal, Skywatcher clock drive and Seymour solar filter Siebert Black Night Binoviewer w/ Ultra 24s, Multi Mag OCA for my Dob, Galaxy Viewer FL Reducer + barlow adapter for my C8 Kendrick firefly heaters for the Binoviewer EP's A fair number of eyepieces, filters, etc. Barska X-trail 30x80, Zhumell 20x80 and Alpen 10x42s binos. Solar filters for all the binos.
SLAP Observer --- TMB130SS, SV102V(LOMO Lens), SV80ED Deluxe "The only thing necessary for the triumph of evil is for good men to do nothing." -- Edmund Burke. "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." -- George Orwell "The measure of a man’s greatness is not determined by what he accomplishes for himself, but by what he accomplishes for others.” -- Some Bald Guy
My binocular collection Binoculars by date of addition Binoculars in Alphabetical order