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
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!~
Takahashi FS78 AP 92mm F7 Stowaway AP 130mm F6 EDFs AP 155 F7 EDF AP 175 F8 my new baby AP 10 inch Mak AP 400 QMD AP 1200 Goto CP3
“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:> Ring detail is highly seeing dependent.I had a 4" TMB with binoviewer, 1.7x corrector and fantastic 8.3mm olympus eyepieces under absolutely 10/10 sustained stable skies ONCE (the only time in 10 yrs I thought - these are absolutely perfectly stable skies) and the ring detail was impressive. I had viewed Saturn Many times before with the same scope but this was one step beyond. I started splitting doubles immediately and noted how I could place secondaries sometimes onto primary 1st diffraction rings and make them look like little pieces of jewelry with stones.
Quote:Not much substance in that review, Ed has written more in depth reviews in the past.
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
"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
Quote: Ring detail is highly seeing dependent. - Jim
Quote:Speaking of planetary performance, I have viewed Saturn each night and it is very nice. I can easily see the Cassini Division and various shades of yellow on the planet. I have only viewed from my neighborhood back yard and so the seeing may not always be the best with all the homes. I also think I see the moons quite easily. I keep wondering how much more there is to see through my Tec 160Fl if I do get better seeing, perhaps I should take the scope out of the city. What more can I expect to see with a 6.3" refractor? I realize I might have to be patient and wait for seeing to clear and I have only viewed for a few minutes at a time both mono and in a bino. Thanks.
Quote: It was easy then but later I could not see them at all. Same with the Plato craterlets. Nearer full moon I could easily see 4 but the last couple of nights I can only barely make out something and that is because I know where to look. It should get easier in the coming days I think.
Quote:Quote: It was easy then but later I could not see them at all. Same with the Plato craterlets. Nearer full moon I could easily see 4 but the last couple of nights I can only barely make out something and that is because I know where to look. It should get easier in the coming days I think.
The Plato craterlets are hard to spot at any time except full lunar noon and morning/sunset. But even a 4" scope will show you four in good seeing. The Plato area is one of my favorites - try observing Mons Teneriffe near Plato as well. It's rewarding in a variety of illumination angles.
I've found that the best seeing often occurs right after sunset or in the early morning hours. My best planetary views have been had during these periods. It pays off to rise early and take a peek. As an added bonus, the scope is thoroughly cooled by then (left covered under a tarp to protect from the dew). The early morning, of course, works better before the planet is at opposition.
One hard target to spot is the polar hexagon. I haven't heard anybody report seeing it so far. I've seen the bluish/gray polar cap but couldn't perceive any hexagonal shape. I suspect it will take something like 10/10 seeing with a fairly large aperture to make out unambiguously.
Planetary observation is a game of patience. Try sketching over an hour and so and see how much more you'll notice.
Quote:Quote: Ring detail is highly seeing dependent. - Jim And seeing is highly altitude dependent. With Saturn this low for northern latitude observers, we can't expect the views we had in the past. I can't today get the views with my 7" apo that I got easily a few years ago with my C9.25 when Saturn was high in the sky. I struggle to go much above 300x on Saturn with the apo when I routinely used 450x with the C9.25.Tanveer.
Quote:I have read that beyond a certain size, the thermal inertia of a big slab of glass in a triplet become difficult to manage and become a limiter of performance. What is the experience of the big apo people?
Quote:that super-crisp view of the planets at high magnification is an extremely rare occurrence, but I've had a few moments over the years, sights that remain etched into my brain. Sights that makes you want to crawl into your telescope and live there forever.Clear skies!Thomas, Denmark
Quote:Well, even according to TEC (Yuri) and at least one CN'er, the difference on planetary between the TEC140 and TEC160 came down to slightly sharper clarity of Cassini's...and not much else.
Quote:True. I am just not sure yet what really good seeing is I think.
Mark EON 80 - Twilight 2 | C11 - iEQ45 | Astro Physics 175EDF - 900GTO
Quote:From what I can see with my 175EDF, is that it is less affected by seeing than other scopes I have owned. I suspect that it's because it's concentrating so much energy into the airy disk and not throwing much out to the diffraction rings. Instead of a blob that dances around when the seeing is bad, you can see the airy disk dancing around, allowing me to split doubles that would only be a mess in other telescopes I own or have owned.As far as the comments that the magic of this scope is related to imaging more than visual, I disagree. Visually, the contrast is so strong in the 175EDF, I have been able to detect more faint galaxies this spring with it than my C11 set up right next to it under my light polluted skies.
"Coffee leads men to trifle away their time, scald their chops, and spend their money, all for a little base, black, thick, nasty, bitter, stinking nauseous puddle water." ~The Women's Petition Against Coffee, 1674If it ain't broke, fix it 'til it is.