Tom Karpf (tkarpf) Vice President, Astronomical Society of Greater Hartford www.asgh.org
Scopes: Celestron 9.25, Orion 80MM and 120MM EON Apo
Solar: Lunt LS60THa/PT/B1200/50DS
Binos: Canon 15X50 IS Mounts: CGEM and LXD75
Eyepieces: Explore Scientific, Meade & TeleVue
Camera: DMK 41, Canon 6D, SBIG STT-8300
Messier Certificate # 2508
My Images: http://www.astrophotogallery.org/u342-hfjacinto.html
Quote: Ok, maybe I was just trying to console myself with a cheaper scope!
Joe (quote)"That does it! Next Big Bang, someone has got to rethink this gettin' old business!" Joe Daugert -------------------------------------------------- >>>>>>>>>>>> ISTAR Scope Club <<<<<<<<<<<<
Quote:So when it comes to imaging as most photos I see are in mono then surely there is no false colour and thus no need for such expensive optics? A 200$ scope would be as good as a $2000 scope? I speak only here of mono photos.
Telescopes and Guitars... Can't have too many of either one.
“I am the only person to ever ace a 1951 USAF resolution test. My 'to observe' list says 'done'. I do not use charts or atlases when I starhop; men do not use maps. One of my sketches won an SBIG deep sky imaging contest. I am the life of star parties I have never attended. I never say anything looks like a faint fuzzy - not even a faint fuzzy. Pilots aim green laser pointers at me. Don Pensack proofreads my CN forum posts.” - The Most Interesting Astronomer in the Universe
Clint & Debbie Whitman (aveman JOIN US AT CSPAMP VII 8/1,2,3/14 Classic Telescopes, 9" f 10.6 AP Refractor ThePEARL, 1946 4" Tinsley Saturn Telescope. 1970 4" Unitron 155c,1954 100mm Unitron Brass 152. 1950s Nippon Kogaku refractors 5 CM, 6.5 CM. 1965 10" F8 Cave Astrola, G-11 ST2000xm Over 5500 posts prior to the CNC on 03/14/14
ALL my posts should be considered as opinions shaped by MY experiences and understanding of the facts.
Quote:Hello all,Don't know if I'm in the right place for this question but I'll plough ahead regardless!I know the basic differences between these lens types and you get what you pay for as as Apochromatic are multiples of the cost of an Achro scope.. But one of the main benifitsof Apros is their ability to eliminate (almost) false colour. So when it comes to imaging as most photos I see are in mono then surely there is no false colour and thus no need for such expensive optics? A 200$ scope would be as good as a $2000 scope? I speak only here of mono photos.I must be misunderstanding something here and their is a big hole my reasoning?
.... back yard astronomer ================= Don't forget to look at the moon often. Its a play ground of fun if you throttle up the magnification!
I lost count of my scopes. Now I just want mobility. I came, I saw, I bought some interesting accessories, and put names to faces: NEAF 2012, ASAE 2012, SWAP 2013, ASAE 2013.
C8HD CG5 EQ
Quote:Having owned a large number of apo's and achros, a well corrected long focus achro is well suited for serious visual planetary observing. For visual work, an apo is overkill.
François C8 f/10, lunt 102 mm f/7 ED. SkyWatcher 12" f/5. pentax XW 40, 30,10 delos 14, 8, 6, 4.5. Vixen lvw 22 Brandon 12, 8 TV 2x barlow Closer and closer to the ideal eyepiece collection, but never reaching perfection
Quote:Quote:Having owned a large number of apo's and achros, a well corrected long focus achro is well suited for serious visual planetary observing. For visual work, an apo is overkill.
i like using a fast apo for visual as it allows me to have large FOV and wide views a long achro could not give as well as nice high power views.
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
1. I have yet to view through any apo that did anything better than my long focus achros!
2. I've owned apos from Takahashi, A.P., William Optics and others and was simply unimpressed by their performance to cost ratio!
3. The continued market hype behind apos is total, complete and utter nonsense!
Quote:I've found that deep sky objects appear with better contrast in a long achro than in the much overhyped apo! The ONLY reason for an apo is to help keep the tube length manageable while maintaining decent color correction. Depth of focus which is important for close binary and planetary observation is sorely lacking in the fast apos.
- Jared Willson
Keep on looking up...
Meade 60mm f/11.7 achro refractor
Vernonscope 94mm f/7 Brandon triplet APO (A-P Optics)
Orion EON 120mm f/7.5 ED APO
8" f/6 Newtonian (Mike Spooner mirror)
Meade 10" f/10 SCT
12" f/5 Meade LightBridge Dob/Newt
Many eyepieces and accessories
Always lusting after large MCT, but never buy one
Quote:I had a Zeiss AS100 refractor for many years and thought it delivered outstanding images. Several years ago I got an offer to buy a Showa SD100 apo refractor. I decided to go ahead, purchase and compare the two. Both are 100mm f/10's.Though the Zeiss AS is considered to be somewhat better than a normal achromat, using a leading "short-flint" element; compared to the Showa, it showed noticeable color; at least more than I had ever noticed before. I still have the Showa. Sometimes you have to compare to really see the difference.
--------------------Clear Skies, PJ Refl.- 203/1420; Refr.- 110/616, 75/500; Bino.- 15X60, 10X50, 8X30 __________________________________________________