Celebrating the 30th anniversary of the USFL, when football was more than a game.
That's me in the avatar running back a pass I intercepted for a touchdown
Skywatcher 120ED Refractor Assorted Zhumell Planetary, Skywatcher and ES eyepieces, a 2x barlow and a few filters. iOptron MiniTower II Sony NEX 3 for astrophotography
Quote:If you are just looking at stars a contrast filter works fairly well and renders a natural color.
Explore Scientific ED127Explore Scientific AR152Celestron Omni XLT 102 Orion XT10i
Quote:The filters you listed are for visual as well as photography. I think you'll get the most benefit from the filters when splitting uneven doubles where one component is much brighter than the other. The filter will reduce the CA around the bright component while also cutting down the glare. I haven't tried the 495 long pass, but I do own the Semi-Apo and the Fringe Killer. Personally, I prefer the Fringe Killer to the Semi-Apo. The Semi-Apo brings things back to a more natural tone, but I didn't think it was quite as sharp. When it comes to color contrasted doubles, my AR152, a 6" f/6.5 achro, does distort the color on white and blue stars. For instance the gold component of Albireo does indeed look gold, but the whitish blue component looks more of a washed out green blue color. However, your 5" should have less CA than my 6".
Vixen 140mm Neo-achro, 2" AP Maxbright diagonal, 50mm Celestron Vixen Silvertop plossl, 35mm, 18mm, and 15mm Ultrascopic/Ultima, 28mm & 20mm ES 68, 19mm TV Panoptic, 5.5mm Meade UWA, 2.4x 2" Dakin barlow (prototype barrel).
Quote:Quote:If you are just looking at stars a contrast filter works fairly well and renders a natural color. Do you mean a contrast booster filter ? If so will this reduce CA at the same Time ?
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
G11/Gemini-2/OPWB Canon 60D (unmodified) with 18/55mm kit lens and "nifty fifty" lens Assorted M42 screw mount lenses (28mm thru 300mm) Celestron 102GT refractor (Costco special) 8/10 inch astrograph someday. DeepSkyStacker 3.3.2 StarTools 1.3 http://www.astrobin.com/users/StarGale/ http://everettastro.org/
“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
Takahashi SKY90 , Vixen SP
Istar 127mm f/8 Achro , HEQ5 on TV Gibralter
C9.25 XLT carbon fiber , HEQ5 .