Nexstar 8SE, SV F60M3 ES 82* 14, 8.8, Meade 5K 24 Constellation Hunter Norther Skies #101 Lunar Club #747 Messier #2629
CPC1100 Nexstar 8i + GPS & Rays Brackets Denk S1 power switch Orion 100 mm Refractor Meade LXD 55 ...AR-5 127 mm Refractor Gerbring heated clothing in the winter Exploradome Observatory S.I.E. (Smiling Irish Eyes) 39*21'03" N 77*28'12" W The sky over my head....
NexStar 6SE and 102GT(OTA), Orion ST80-A, bunch of mounts, eyepieces and filters.
Quote:While Bob G. is technically correct regarding the "mirror flop" associated with SCTs, I have used the Hubble Optics artificial star to collimate my 6SE with good success. Admittedly, you may have to "tweak" the collimation using a real star test, but the Hubble will get you pretty darn close.Chemist
8inch Edge HD, Nexstar 8SE, Nexstar 4SE, 80mm ED, Z10 Dob, Celstron AVX, misc ES, Xcel LX, and Hyperion eyepieces
Truth is the cubed root of Verbosity.
Dark Arts Observatory - Brockport, NY - Skyshed POD XL5 with iOptron iEQ45 Mount
Scopes: C8, C5, SV110 ED, EON-72 ED, ST 80, ATRC6, Megrez 90
Clear skies!- Steve"It takes all the running you can do just to stay in one place." - The Red Queen
Quote:Hi Tel:I tried this once with an LED flashlight. I covered it with aluminum foil and poked a pinhole in the foil. Worked ok, but not as well as a commercially made model.The issue seems to be the size and roundness of the hole that the light goes through. You want it to be very tiny and very round. The one I ended up buying had a laser cut hole of I think 100 microns in size. My pinhole was much larger and the edges were quite ragged because the foil had just been pushed out of the way by the pin, not drilled cleanly.The result was a star image that was somewhat spikey looking which interfered with getting a good collimation image.-Dan
Quote:I have one too and it is very nice. But I didn't use it that much because I thought that a very long distance is needed and in urban enviroment this means I should put it on somebode else's property. But if 12m is enough as Tel says, then I can do it indoors.The produced stars are perfect and you get various diameters (emulated mags that is) and seeing can't affect you at 12-15m, with the exception of fog in London perhaps.
Brian S. Johnson
All terrain Z10 http://tinyurl.com/ouxfsyu with refigured primary, 63mm Protostar secondary.