Astronomy educator/Sidewalk astronomer
Owner of Astronomy Delight franchise
18 inch f4.42 Dob on eq platform w ST120 f/5 finder
12 inch Zhumell Dob
8 inch f/6.9 home made Dob with Seevers optics
William Optics red 10th Anniversary 80mm FD
C8 XLT on Vixen GPDX
26lb eyepiece box
Cernan Space Center astronomer
Member of Northwest Suburban Astronomers
CG-11 5"mak,CR6&4,c60(vixen)ST120,MK67 1939 B&L 7x50,1943 AO M28 Past Friends 32 rfrs including 6" petzel,antares 6" 1529, Antares 4"f15,Jaegers 5" f5,76mm Mayflower,etc 19 Newt 4"-16" including Meade 1266 RG,DS16,SN10,RV6,SPC6,6"SS conqueror,5.5"CC,10" homemade,4" dynascope.etc 16 sct/mct 90mm-10" including Meade 2010,Super C8,180mm Orion mak,meade 2045,c90 etc 250 binos My Gallery
150mm MCT f/13, 31% CO
"People say I'm in denial. I disagree."
"The heavens declare the glory of God; the skies proclaim the work of his hands." Psalms 19:1
“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
Friends call me Duane. Compustar C14, Leo Henzl's Custom C8, 6" Refractor Adv. GT mount, 6" F5 Omni XLT Newt., LXD-75 F4 Imaging SN8, Meade 8" F6 Newtonian, EX Dynamax DX6, RV-6 ETX-90 Astro, Meade 2045 4" SCT, B&L 4000 Vixen/Celestron 80mm F11 JC Penny 60mm AZ/ALT Refractor Binos 25x100
Orion Xt6i, Orion Xt8i, Sky-Watcher 10
Time spent looking at the stars is added to your life
Bashful, Misty, and little Ralphie - my heavenly stars
A-P 105 Traveler ~ TEC 140 ED ~ TEC 6 MCT
A-P Mach1 GTO ~ Losmandy GM-8 ~ TV Gibraltar
Quote: Identical aperture, Identical CO size, and identical quality, they will perform more or less exactly the same.But these three things are rarely all the same.
Happy owner of--
A Mag 1, 12.5 inch Porta Ball
A Dual Axis Equatorial Platform
A PST Double Stack
Quote:Darren,You reviewed a F/10 LOMO 180 many years back. I happen to have one due to that review. All SCT I've seen are F/10. I've seen MCT between F/10 and F/15. Not apples and apples, but what are your thoughts on the 7" Lomo F/10 MCT vs the C8? Would a 7" f15 Mak may offer compete with a 8" F/10 SCT on Planets and Double Stars?
... and still the best wife I could wish for!
Quote:This is first time that I heard a Questar 3.5" outperforms a 130mm APO refractor. It is even more surprised it is Tak TOA 130 which is among finest refractors. Theoretically it is completely impossible for 3.5" Mak to outperform 5" APO refractor: aperture and central obstruction unless something is way off with the 130mm.Was your scope fully cooled? How about collimation? was it spot on? Few reviews that I read say a quality 4" APO refractor outperform a Questar 3.5" which does make sense to me.
Quote:With regard to the OP's question, I have compared my 8" TEC Mak to a C8 many times. While they are in the same ballpark, the Mak is quite a lot better on planets. BobP.S. the only 8" scope that has ever beaten my 8" Mak on Jupiter is an 8" Newtonian made by Normand Fullum.
Orange Tube C8, Tasco 7te-5, 4" Criterion Dynascope, Jason/Towa 313
Nikon Action Extreme & Pentax WPii Binoculars
At my club, everything one could want up to 18"
Quote:Larry, no way! really? Horrible SA?
I just read the Q ad from way back when, the one showing the infamous license plate photo. I thought they were all good and they rejected those that could not exceed Raleigh.
Quote: Longer focal lengths are more tolerant of optical imperfections, making this an apples-to-oranges comparison (or, at least "Red Delicious" to "Granny Smith").