The night sky is the canvas....
My optics are the brush....
The Milky Way is the masterpiece
reductio ad absurdum of epistomology is solipsism....
Binoculars: Miyauchi Saturn III - 33/39/50/71/150x100, WO 22x70ED, Fujinon 16x70 FMT-SX Pentax 10x50 PCF-V, 10x43 DCF-SP, 6.5x21 Papilio
Nikon 10x35 EII, 7x35 E, 8x30 EII, 8x23CF AS Diplomat
B&L 7x26 Custom
Scopes: C9.25, TMB130SS/FT, SV80S-LOMO 80/480
Quote:Yes, they are cute, Bill. I hope you can confirm that all is well tonight.
When is your new tripod head due to arrive?
AL MasterObserverC #24
"your signature is too long. Please use the back button to edit your signature" A scourge of equipment unpopular to most, but fun for me!
Quote:I wouldn't buy tripod 'there', you may get a shock between US prices & Australa retail
Quote: Here is something you'll have fun with - zenith views and a 9 lb BT, so light you can rock the tripod back on two legs a little and still handle it easy without fear of it getting out of control. You can hit true zenith and then some.
It was a 20x power, 0.3° field of view telescope, sporting a singlet objective stopped down to 15 mm that profoundly changed our perspective on earth's place in the universe.
I mostly enjoy small, fast, and (ultra)portable glass: Bushnell Legend 8x42, Pentax PCF WP II 20x60, MiniBorg 60ED, ST-80, EON-80, ST-120, 6" StarBlast.
Quote:OK startest shows that collimation can be shifted and the culprit seems to be helical focusers, not the ep fit in the barrels.I can move the focused star of one barrel over the defocused disc of the other barrel by pushing on the focuser rings.
Quote:It seems your specimen has the same issue as mine, but to a lesser degree. Is there any asymmetry between the left and right focuser in terms of amount of slack? (in mine that was definitely the case) And more importantly: from your description it seems that the neutral position yields a spot-on collimation (the key problem with my specimen).
I had quite some trouble to get the vendor send me a replacement. They claimed nothing was wrong with the pair I returned to them. I am still puzzled by this.
Good to hear your generally positive comments. Tuesday I should receive the replacement.
Quote:You ordered from OPT, right? They have a 30 day full refund no questions asked policy.
Quote:I'd be curious to see photos which:- Shows an exit pupil on the BT-100, using, say, the 19 Pan. I suggest this because the way the eyepiece field stop 'sees' light leaks, etc., is a bit different than the view from some distance removed from the focus (it's all about viewing geometry.) To understand this, when the eyepiece is removed note how the 'fingernail' changes its appearance fairly significantly as your eye wanders about while peering from about a foot back. But with the eyepiece installed, the light leak has a fairly constant appearance over a pretty large range of eye movement while you examine the exit pupil.Ah, if only I could get my grubby hands on an example...