I think it's the hardware needed to hold the glass filter. The 2" probably use standard camera filter rings, or at least something from the same source (since...
... You lost me here- why only 5%? If you use an EP with enough magnification that the exit pupil is <1mm, all the light will get into your eye. With an 8" ...
It's amazing what a few thousands of an inch ground in the right places, from a piece of glass will do. In (A History of Celestron), Celestron The Early Years,...
... magnification that ... Your are right that you could select an eyepiece with a small exit pupil. In my quick example I had not considered an eyepiece,...
Rod He claims he has it insured and will give me my money back if it is lost. I can buy the 12" and sell the C11, I payed $1000 for it, if it gets here later....
Uncle Rod, I just now navigated to your updated Astroblog and the first thing that ... I just cannot pass up a chance to describe something which happened at a...
... I got an eyeful of sunlight that way once. Way back in jr high school with a 3" reflector. I did solar projection and would line up the scope by removing...
I had a strong after image for a few hours after a careless colleague put in my eyes a laser (more or less like the ones now used as keychain toys). As an...
Hi, i'm wondering if a Byers C14 Retrofit fork mount need a relay box for autoguiding or if the cable that connect in the hand controller can be connected...
... "Scorch your shirt"? How about "vaporize your bod"? :-) The damned thing is so dangerous that Roland Christen, the guru of Astro-Physics, refuses to sell...
... <http://www.astro-physics.com/index.htm?products/accessories/solar_acc/astrosolar> ... Contrast that 5% with the Orion full aperture solar filters which ...
It is possible but one must be careful. I got my complete CG-11, mount and scope for $800.00. It was used one time then left to rot in a garage for a few...
Hi folks, Most of the time the scope I use is an Orion Skyquest Intelliscope 10" dob that I bought in 2004. During the past three years this dob has proven to...
Hello Group After talking to Rod Mollise, the group manager, I am delighted to announce that The Imaging Source is running a competition in which you can win...
Intes made a Herschel wedge in 1.25" and 2" that had a mirror at the light output to direct the Suns rays away from the body onto the ground. I have the 2"...
the Herschel wedge views are definitely and by far the best, i second that. It will not vaporize your body, it will not even burn your bare skin because should...
... Hey now Thad 8^) One observer's crapola is another observer's perfectly safe and functional solar filter. Other than the color representation and price, I...
... light ... have ... various mylar ... I suppose you haven't heard of etalons and the Coronado, et al products. Even they require a blocking filter at the...
a pre-filter or erf is something very similar to a herschel wedge It is true that the photo astrosolar (3.8) renders excellent quality images, but, even though...
... The fact so many people report pinholes and tears in such film is reason enough (at least for me) to *NEVER* use such flimsy/fragile material for solar...
... A followup: fortunately for that careless user, he was off drinking beer when his scope self-destructed and everyone yelled at him to put out the fire. ...
How hot. If I have a sunny weekend I'll take my, not ready for prime time 0.75 x C8 out for a better sun test, Check out my CVW album. This time I'll take the...
No it's not. Pinholes are NOT a safety concern (and many mylar filters are dual-layer, anyway). What they affect is image contrast...and that is so damned good...
"Temperature" is a tricky concept here. In its usual sense, the temperature in the beam is probably not much above ambient. If you have an IR thermometer you...
I am staying calm, for the moment. I hope that the seller's good feedback on Astromart, supports his statement that he'll refund my monies if the tube is lost...
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