... On most of the StarMasters I'm familiar with, Rick has accommodated your request already. The locknut that secures diagonal rotation has been replaced with...
I've taken seriously the caution expressed by Rick about overcleaning the primary. He emphasized to me, when he delivered my 24", that I shouldn't clean at...
Hi Bill, This is what Rick told me to do when that happened to me. Look closely and you should see a center mark on the mirror, mine was a small red dot. He...
If you can't find the center mark, take a roll of thread and cut two pieces about 6" longer than the diameter of your mirror. Tape one end of a piece of thread...
If you assume that the center of the centerspot coincides with the optical center of the mirror, a couple of mm off does matter, if the spot is used in the...
Hi all, first Hello Ginger, its been along time, hope your still shooting pic's and still have the 14.5 starmaster? On the center spot situation, the Jim Fly...
... optical ... is used in ... Jan, I read a posting by CZ on the Zambuto optics group where Carl cites tests that have been done showing that even on fast...
... Randy Thank you for the tip. It rather ingenious, and I never would have thought to use thread. Typically, I use Jim Fly's system to mark the center....
... At f/4.1 (current focal ratio for 24-inch aperture SM), the coma "free" field diameter is only 1.4mm diameter. A 2mm displacement of the primary mirror...
In theory, it sounds practical but assessing where the "high" point on the mirror is (especially on a large diameter) to within a mm of horizontal movement is...
Vic I will look for plastic or nylon washers to put in, and the wing nut idea is a good one too. I always check the rotation with the AC anyway since I have...
Based on the feedback I get, It is not uncommon for OEM center marks to be "off" a couple of mm. Their placement accuracy is only as good as the philosophy of...
My last close inspection of my 5 year old 24" leads me to think that it might be time to think about having it recoated. I had thought that Arizona conditions...
I am told that the center spotting of the mirrors used in Starmaster scopes is done by Starmaster, not by the manufacturer. If Carl Zambuto were center...
Carl is now using Nova for mirror coating. They have a very good turn around at this time (I was quoted 2 to 3 days about a week ago). I think you can use...
I believe the maximum size mirror Nova can recoat (per the Nova website) is 20" - hence it would seem your best alternative is Spectrum for your 24" Clear...
You may be correct, but I would still contact Steve via email first. My 11" was not listed but I got a price quote which was the same as a 10". I think we all...
Given how obsessive people often get about collimation, I'm amazed that some people take this particular detail so casually. In a discussion about how much ...
Since I got Rick's new 11" f/4.5 Hybrid, I have not wanted to stop playing with it. I have my 20" setup with wheelbarrow handles in the garage so it is no more...
Carl stated that the reason for the change was time and money. Nova can do them faster and the turn around time was less. They were also closer which made it...
Hi all, a quick question, if someone is in business, and something goes wrong, for whatever reason? , and they take care of the problem, what is the...
Carl may have made the decision re: coating his mirrors at Spectrum because he literally has to ship them across the entire country to have it done. This is...
As I guessed, and Floyd reinforced, Carl switched for economic reasons, not quality issues. If Carl uses Nova, I would think you are getting one of the best...
... Bill, I think that your options are somewhat limited due to sheer aperture of the glass. Spectrum still does Carl Zambuto's 24" mirrors. But, speaking as...
Bob, Interesting that you mention that. Removing anesthesia in the middle of brain surgery is done routinely at some centers. It is used to treat some forms...
Hey all! After just under 6 years of use, I think I have a battery going bad. I use a Kendrick trickle float charger on the 7 amp-hour batteries for ...
... It indeed sounds like your battery is on its last legs. I use a lot of these in uninterruptible power supplies and I reckon that if I should get about 5...
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