JAWAID IQBAL ABBASI
Rural central lower Michigan
All MY reflectors are apochromatic. I am personally covered with infrared detectors and emit at 295 Kelvin, 24/7. If I were to recieve a spin entangled photon before you recieved its twin, MY photon would predict your photon's spin. Every time. MY family's lineage goes back over three billion years and has a whole branch of science devoted to studying it... The most Quotidian of observers
Quote:I am very sorry to hear about your problems. I think though this calls into question whether it is "Binoviewers" that you don't like, or the specific binoviwer you have. At any rate, I can understand your frustration. No offense against Siebert intended, but this is often the case of small mom and pop kind of vendors. They lack the resources to provide the in depth, no questions asked kind of return polich that larger firms offer.As to what you should do, I would persue him and ask him "Tune" the parts of the binoviewer that are giving you so much trouble. If he won't return it, perhaps you can prevail upon him to fix it. Maybe it is a simple fix for someone like him.And if he refuses, then once we have that info (and please be fair) then others can use that information to make their own decisions regarding who to do business with.The Binoviewer market is not a big market, and Siebert has a niche that I think needs to be served because he provides a lot of innovations, but if he wants to serve that market, then he needs to step up and serve it well. Ask him to fix them.
Quote:Why not call Harry and let him know what's going on with the binoviewer. He will take care of it even if you bought it second hand.
Quote: So the buyer had the option of paying $50 up front for multiple alignments if needed, or pay $50 later for each instance of alignment. I see that as a well disclosed and fair choice.
Quote:I'm increasingly inclined to think that all binoviewers should be supplied with a comparator for the checking of collimation. The number of threads posted here in which difficulty with image merging is mentioned is just plain alarming. Are binoviewers often shipped as defective, or are many customers simply not capable of using them properly? A device which could unambiguously differentiate between the two cases would be useful...
In this specific case, might I ask what focal length eyepiece is being used? Binoviewer mis-collimation scales linearly as the inverse of the eyepiece focal length. Halve the eyepiece focal length, and the image divergence doubles.
Compustar C14 Leo Henzl's Custom C8(VP Sales Celestron) Celestar C8 6" Refractor Adv. GT mount 6" F5 Omni XLT Newt. LXD-75 F4 Imaging SN8 Meade 8" F6 Newtonian Dynamax DX6 Criterion RV-6 ETX-90 Astro Meade 2045 4" SCT B&L 4000 Vixen/Celestron 80mm F11 JC Penny 60mm AZ/ALT Refractor 1963 60mm 15-60 B&L Spotter Binos 25x100 8X40 20x80 Arcturus Bino-Viewer
Quote:Might still be intereseting to measure the aperture.
Glenn in Boulder Starsplitter Dob 12.5" F6 with NGC Max Digital Setting Circles Celestron C8, CG5 mount, Stellarvue 2" diagonal, Skywatcher clock drive and Seymour solar filter Siebert Black Night Binoviewer w/ Ultra 24s, Multi Mag OCA for my Dob, Galaxy Viewer FL Reducer + barlow adapter for my C8 Kendrick firefly heaters for the Binoviewer EP's A fair number of eyepieces, filters, etc. Barska X-trail 30x80, Zhumell 20x80 and Alpen 10x42s binos. Solar filters for all the binos.
Quote:Ed, i don't have an SCT but would the "starsweeper OCS" help or worsen the SCT binoviewer issue. I have always been entrigued with the starsweepers low power, but disapointed it would not work for Newtonians,Ken
Quote:Quote:Ed, i don't have an SCT but would the "starsweeper OCS" help or worsen the SCT binoviewer issue. I have always been entrigued with the starsweepers low power, but disapointed it would not work for Newtonians,Ken As you will note by reading the results of the testing done in the thread refferencced above, the startsweeeper worsens thhe situation. It does reduce the effective power at the end of the train, but what a reducer does is causes the need to move the mirror such that it substantially reduces the operating aperture. Using a star sweeper reducer results in a 6" SCT operating at less than 4".
Quote:Would it be possible to design an SCT with a focuser that moves the eyepiece