My eyepieces are made from the waste product of exploding stars. 10XTi 102XLT ST80A(2" Focuser) XW: All; XO: 2.58 Televue: Naglers-T1 Smoothside-full set, 17T4,12T4,Ethos 17,4.7; plossels-40,32,20,17,&7.4mm; Pans-22,24mm; Delos-6,8,12,17.3mm ES100: 5.5,9*,14,20 ES82: full set ES68: 16,20,24,34 NLV: 5,9,10,15 Ortho: HD-7,9; OPS-9,12 Meade RG 7mm Other: Pentax 12.5K(.965), 10mm Parks Zoom: Nag3-6 *=on b/o DAS Dark Site
Quote:I have really enjoyed reading the current threads regarding achromats. Every optical configuration has it's strengths. For those that have never owned, or looked through a long FL achro, and are wondering what all the fuss is about, let's tell them.Here are a few to start the conversation off.1. Flat field of view due to long FL2. Do not need costly eyepieces3. Pinpoint star images4. Because of #3, great for double stars5. Because of #3, great for open star clusters6. High contrast - "diamonds on black velvet"7. Moons of Jupiter are resolved as discsAny other strengths?
<Insert droll quotation or ridiculous equipment list here>
Quote:13. (lucky 13) Good for muscle building as you haul around the heavyweight mount and tall tripod.
7x35 and 10x50 sears tower binocs, 3" f/10 edmunds reflector, 2.4" f/11.7 manon refractor, 6" f/8 jaegers refractor, 10" f/11 R30 Istar refractor, 3" f/15.8 sans&streiffe refractor, 3.1" f/15 selsi refractor(towa 339), 2.4" f/15 sears refractor, selsi 30x30mm spyglass, criterion 5-draw 25x45x75x spyglass(1957), 4.25" f/14.8 tasco 20te.http://cleardarksky.com/c/OmahaNEkey.html
8. Depth of focus
9. Depth of focus
10. Depth of focus
More Telescopes than I deserve...
Quote:And just so we are all on the same page, F-8 is not a long focus refractor.
Quote: So what is the minimum focal ratio to be considered a long focus refractor
Quote:I'm very happy with my 60mm Skylight using the Carton lens.Razor sharp and super high contrast.
Jules. Tal 100RS Skymax 150 pro mak 6" f5 pds newt Swift 839 vintage frac HEQ5 syntrek and lots of lovely ortho`s
“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
Indiana for a three more weeks...
14.5" Teeter w/ Richard Fagin mirror, TT #66
EON 120ED on CG-5 ASGT
Lunt LS60THa/B1200 Sky Guy Porta II
Denk Super System with A45 OCS
Quote:#18. Never again needing to upgrade! Mike
Quote:34. They double a clothes rack
Quote:Post # 3,000
Kmart 40mm-Thanks Mom|Jason60mm-Thanks Dad|C80SS-Thanks Wife|C90|C102|C6XLT|AP130EDFGT|C-11XLT EQ-2|EQ-3|CG5GT|Mach 1 & Eagle "For once you have tasted flight, you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return".-Leonardo da Vinci "We're all in the gutter, but some of us are looking at the stars."-Oscar Wilde ~RIP Dad, you were my best friend...Godspeed!~
Quote:35. They get you closer to the object your viewing. Always a bonus!