We just uploaded an ad on the in-stock page for an 8" F/6 that's available. Its 1/2" too long in focal length for the customer, we're making another to replace it, but this one is for immediate sale.

I was able to purchase a used quartz ZOC for my Teeter (one of Rob's solar observing scopes which he recently sold to me). I finally installed it, and it has gotten out under the stars a bit from my h

My object is to set up a simple Foucault knife-edge test. I have my old iPhone 5 which have both of light source and camera. So, I try to put a shaver blade in front of camera. To made a fine adjustme

On November 28 Steven Swayze went back to the cosmos he loved so well. I met Steve when I was still an ATM. He was at Table Mountain Star Party in WA State testing mirrors for folks. So he was already

We spent too long making/finishing a 24" that went to Australia, where Peter Read built the scope. People often talk about "magic" when it comes to the mirrors. Its simply a matter of the Seven Criter

The following photos have been uploaded to the Ron’s 14.5” Zambuto in Starmaster Dob album of the zambutomirrorgroup@groups.io group. 5B721F53-0822-4A64-973C-7EB04320702A.jpeg By: Ron Masters <therama

Would it be possible for me to use a full size tool to polish out my 6" f/8 and a MoM? I could do the figuring with a 70% tool. Just curious as its my 1st time. Regards, Sathya.

Hi Everyone, I am usually a guy who silently hangs around without posting. I am making a 6" f/8 8.5" f/6 and a 4.5" f/10 (this will be spherical for obvious reasons). These are small and slow mirrors

Hi all, I have one of Tom Noe's amazing Teleport 10's (number 11) with a beautiful Zambuto thin mirror, and it's finally time to get the mirror stripped and recoated. The mirror cell is very simple -

Hi, very cool idea! My first Foucault tester was built with Stellafane plans, they use a single razorblade that covers half the light source and the view window. That makes it slit-less or pinhole-les

It has been a while since I have been here. Too many projects diverting my attention. I am back to try and finish parabolize my 15" mirror. Mirror has a ROC of 140.8". I am spherical with no turned ed

The following photos have been updated in the Ron’s 14.5” Zambuto in Starmaster Dob album of the zambutomirrorgroup@groups.io group. Jupiter Saturn Conjunction 12-20-2020.jpeg By: Ron Masters

I’m looking to recoated my mirror soon by sending it to Carl. Wanted to know what Carl recommends for a secondary mirror wavefront that is compatible with my Zambuto 8” f6?

I am one among untold numbers who have purchased and enjoyed their books over the years. https://www.willbell.com/ Sorry for the cross-posting, but here are more details: https://www.cloudynights.com/

Paul V. I apologize if this is a bit off-topic. I saw in your brief bio in another thread that you were acquainted with Dr Baker. How many variants of the Reflector corrector design were investigated?

Most of us are aware of the bright halo and diffraction spikes surrounding bright stars but don't realize that the percentage and distribution of light surrounding the object is considered "noise" and

When asked about his secret of staying young, Dick Clark replied, ” it’s simple. Pick your parents carefully. “ Obviously, you can’t pick your parents, otherwise Ozzie and Harriet would have had thous

I recall having seen this pdf before the move. Since the move to the new server, I no longer can find it. Did the files on the original site get migrated?

Hi all....thought I would share my experience with turned a turned edge. I have been grinding a 14" mirror from the flat to a F4.5 using the mirro-o-matic I built. The glass is shaped like a eyeball l