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.
Quote:I have suggested a few more enhancements, like reducing the stiffness of the unlocked clutches and more travel in the azmuth adjustment. Not show stoppers but fixing these would make a great product even better.
- Jared Willson
Quote:I wish Meade had gone with an OAG solution rather than a small guide scope. But, as you mentioned, one could always switch to an OAG after the fact. And I suppose a lot of people would rather have the flexibility of more guide stars that comes with a smaller guide scope.
Quote: I wish Meade had gone with an OAG solution rather than a small guide scope
Tak AP QSI Canon
Quote: Quote: I wish Meade had gone with an OAG solution rather than a small guide scope Hmm? As if finding a guide star with OAG could be easily automated.
C14 EdgeHD, C11 EdgeHD Zhumell 8" f/6 Newt AP1200GTO, CGEM DX, CG5-ASGT Rob Miller Tri36M tripod Canon Rebel XS, Atik 314L+, DSI pro I,II, QHY5L-II SX 7 FW with Astrodon LRGB, Ha 5nm Hutech OAG5, Rainbow Optics Grating Scorpio Observatory
Quote:One can Calibrate FOV in TheSky
8" GSO RC with CSL Moonlite FocuserTelevue TV60isLosmandy G11 with Gemini 2 (with Ovision upgrade)
SBIG STT-8300m with Self Guiding filter wheel
A wide assortment of lenses for my Canon.
Quote:I am not optimistic about any system that guides a large sct with a separate guidescope because differential flexure is fundamentally difficult to overcome due to the ota itself and its two reflecting surfaces.
Quote:What about narrow band imaging? It usually requires a significantly longer sub exposure at a minimum of 15 minutes up to 30 minutes. NB imaging is getting very popular especially for light polluted skies. Peter
14" Meade LX850 80mm Meade 6000 ED APO 90mm Meade ETX 60mm Focal (First Telescope) Orion MiniGiant 9x63 Mallincam Xtreme EXview HAD Canon 5D Mark II Canon 100-400mm f/4.5-5.6L Canon 24-105mm f/4L
Quote:The measure of a well guided image at long focal length isn't just "round" stars, but small and round stars. If the stars are large and round, it could be due to poor focus and/or guiding, and the size of the stars will mask both flexure and field curvature. If the stars are very small, then the effects of flexure and field curvature become much more noticeable.Regarding OAG, I think it is essential if you want to realize the full potential of a large aperture sct. I don't think it could be easily offered in some automated form, mainly because of the difficulty in maintaining focus on the guide chip. At the same time it is not that difficult to use once the system is configured, particularly with a sensitive ccd guide camera and a smooth mount that can tolerate long guide exposures.Regarding the helix image - I have never imaged it myself because it is at -20 declination, and not an easy target from mid-northern latitudes. Even from Dallas it's an odd choice if seeing conditions aren't optimal, and the other examples of pac-man and crab make more sense.Frank
Quote:I was trying not to go there, but if one were trying to conceal tracking errors, far southern targets and big, blobby stars are a good start.
Greenfield, Indiana USA
Deforked 1979 Orange C8, WO 66mm APO, 80mm f/7 refractor, Sears 60mm refractor, 80mm Orion short tube
Meade LX80 IOptron zEQ25
Money can't buy happiness, but it sure makes living with misery a lot easier!
Metuchen N.J. C10ngt TV 85,102 2 cg5gts cube pro 13 ethos 27 pan 19 pan 24 pan Baader wedge,35 pan 6 radian 2xpowermat 4xpowermate 9 nagler jmi feathertouch 35 Panoptic pst Denk std Denk 2s&d21s+ Pst doublestack,SM40 12Nagler Questar hd pier DSI 2 color SBC 900NC Star seek module C 9.25 slt mount AT 80 apo IEQ 45
Quote:Accusations of falsifying data will get an emotional repsponse. Last night was a little better seeing, not great, around 2" best focus. I also got a chance to try the latest firmware. This included some PEC updates and Starlock initialization updates.Here is a 5.5 hour HA Rosette shot. The starlock tracking is essentially perfect. For the pixel peepers, you will see a very slight (about 1 pixel which is .77 arc seconds) diagonal elongation at the center of the frame. I believe this is the last bit of differential flexure. Not bad for a Cat.Keep in mind this is an undprocessed image. Just combined then a slight stretch in PS. Many masterpieces you see on the net are deconvolved, dark overlay trailing reduced, etc.http://galaxyphoto.com/tmp_800/rosett_5.5.jpg
Quote:None of the images I have seen with lx800 and a large sct show any benefit of the greater aperture and I think better results would be achievable with a well-focused 130mm refractor - and it would be much easier to operate. Frank