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

Hi Everyone, This is my very first post here. I started mirror making 20 years ago with a 6" f/10 19mm float glass, naturally ground by hand as it wasnt a tough task. Later on i ground an 8", 10" f/6,

From: Lonnie Robinson <Lonrobie@...> Sent: Tuesday, July 28, 2020 9:14 AM To: 'zambutomirrorgroup@...' <zambutomirrorgroup@...> Subject: Turned Down Edge Hi all, Using Carl’s machine process has vastl

Hi Looking at purchasing a primary. Found a used one. The person (seems reliable) says it is a Zambuto. They have the original Zambuto box it was shipped in but not the paperwork. 1) How can I tell if

Self-isolation has helped me find time for ATM - and to make progress on my first mirror, which I had planned to be 8”f/9. I’ve completed #320 grit on the 8” mirror, which has seemed to settle into ab

While fine grinding, the tool slipped from my hands about 1/4" onto the edge of the blank. Amateurish mistake. Spalled a few chips along the edge. Not deep but embarassing. Chips went down about 1/2"

Hey everyone, Our company is selling medical masks for wholesale and retail. We recently dropped our prices and we are throwing in a discount code for extra savings. The website is https://www.iscsele

Hey everyone, new to the group. Excited for this group's content. Hope you are all staying safe

Hi all......Here is a easy way to make a lapmat for those that remember the old ones. I took a piece of junk MDF fiber board and cut grooves into it with my mill using a 5/16 ball mill. Could also us

Hello everyone, This is my first post on this group, and I'd really appreciate any advice you guys can offer. I recently built a mirror-o-matic machine, and have attempted to grind my first mirror. Ir

Hi Chris, I too am trying to make friends with my new mirror machine, I feel I have worked out most of the grinding and polishing issues and now striving towards mostly complete machine figuring using

Question on BAD pollen, and by bad, I mean a few hours of my C8 and this was the result: https://imgur.com/Lg1y0NG.png My 14” f/4.5 from Carl looks like this: https://maphilli14.webs.com/astro-equipme

I learned by making several mirrors by hand before going to the MOM. A machine is great in that it reduces hours of hand labor. I don't think any videos, texts or messages will supplant personal exper

So the mirror is fully polished. It happens to be a 10" F/4.5 Supremax mirror. We ran it for over 24 hours non-stop. Find two photos attached. One is the pitch lap so you can see the thickness, the fa

Greetings, everyone. I put a notice up on our web page this morning to let folks know that we continue business essentially as usual. We reside in a rural location and have full services on-site as ne

Dear all, I used to polish mirror with 75% TOT, 15% of tool diameter offset. It is very easy to get a TDE, specially extrem 1/8 inch edge, and hard to get off. I know some top mirror makers polish mir