"You're not afraid of the dark, are you?" - Riddick "The best scientists are humble. They seek to understand, not to ensure their legacy, but merely to understand." - Mori
Helios "Special" 150mm f8 achro (pimped) - now gone to a new home :- Lyra Optic 102mm f11 (Kunming) achro Celestron/Vixen 90mm f14.4 achro Swift 839 60mm f13.5 Intes Micro M603 MC Orion 180mm MC Lunt LS60THa/B1200PTDS50 (solar Refractor) Vixen GP, HEQ5 Syntrek, modified AZ-3, AZ-4 mounts
"Life is too short to miss the beauty of heavens."
WO Megrez 120 ED on GP Mount
WO ZenithStar 80 ED II on Porta II
10" Meade LightBridge/Paracorr
Orion ED 100 on Polaris Mount
Astro-Tech 8" f6 Dob
Bushnell Ares 5
Meade 226 2.4" f11.7
SpaceScope 2.4" f15
Quote:If it clears up tonight I plan on doing more Jupiter and Lunar viewing and will specifically look for CA.
Quote: Antares 105/1300 (actually 94/1300...) and I believe it's also a Carton lens. I know of no manufacturer other than Carton that has made a 105/1300mm objective. 105mm is the actual physical diameter of the glass, not the free aperture.
Quote: My sources suggest that the Antares Elite glass is sourced from a Vixen factory in China.
“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: Quote: My sources suggest that the Antares Elite glass is sourced from a Vixen factory in China. You mean a Vixen factory in Japan, right? Vixen did get at least some of their objectives from a subcontractor. Their fluorite apochromats came from Canon-Optron, it think (but I can't remember with certainty). I think there's a very real chance that the "Vixen supplier" Antares speak of is, in fact, Carton.
Quote: I'd like to think that you are correct, but Vixen does have a (subcontractor) glass factory in China (Synta? Bosma?).Looking at the price comparison of the Antares 105 f/15 and Vixen 100 f/15, odds are that the Antares glass is sourced in China.
Quote:The odds are zero that the Antares Elite 105/1500, 105/1300 and 105/1000 optics were made in China.
Quote: Is it worthwhile having Dan at Crawmach build a new cell for the Antares to utilize all 105mm?
Classic refractors incl. Unitrons, Zeiss, Goto Optical, Royal Astro, Edmund; visual observer.
"Toto, I have a feeling we're not in Kansas anymore!"
Quote:I always tend to use a yellow filter for the planets as it helps me see more detail,
even with the Tak I stick the filter on.
Quote:Quote:I always tend to use a yellow filter for the planets as it helps me see more detail, even with the Tak I stick the filter on. Did I understand you properly? You tested an achromat versus a superapochromat on planets by using a yellow filter on both?? Thus suppressing most of those wavelengths where the apo is far superior - and thus not letting it display its full potential??? Sorry, but if I have understood you correctly then this test between a boosted achromat and a handicapped apochromat does not seem of relevance to me.Chris
Quote:I always tend to use a yellow filter for the planets as it helps me see more detail, even with the Tak I stick the filter on.