Paul McNabb founded the mirror lab in 1997 in order to create the best amateur telecopes possible. Inch for inch our mirrors surpass store bought or commercial grade scopes.

Part of the Saint Petersburg Astronomy Club Home of the 2017 OBS Star Party

Lab Members

Ralph Craig is a lab instructor and has made mirrors from 6 inches to his recently completed 16 inch f5 mirror.

Allen Maroney
has completed three mirrors in the lab between 8 and 18 inches. Allen is also buiding a second robo foucault tester based on James design.

Mike Davis
casts his own mirror blanks.

Irv Nadelhaft

Charlie Mullen ground the mirrors for two years worth of rafflescopes but now has moved on the clear skys of New Mexico.

Lab T-Shirts Available

Lab Alumni

Lenny Remetta

Keevy McAlavy

Bruce Kazcmarik

James Lerch built our robo foucault tester and in house aluminizing chamber as well as a laser interferometry testing setup.

Ron Jones AKA the figurer is about the best mirror maker this side of the mississippi. You can see things in his 8 inch mirror that would impress a takahashi devotee.


Russell W. Porter father of amateur astronomy and founder of Stellafane

Mel Bartels Website
Amateur Astronomer and innovator.

Stardate Website
Good overall observation site.

NGC Astronomers
Former member Matt Terry has his own astronomy club north of Tampa.

Southwest Florida
Astronomical Society

A nearby Astronomy club.

Telescope Software
Ray tracing program for determining all required dimensions for a newtonian reflector. (New Website)

Program for designing mirror cells.

Observing Software
3-D interactive simulation of the solar system and beyond.

Plots the jovian satellites.

Lunar Phase
Shows all the phases of the move and more.

Mirror Lab Home Mirror Making Supplies Robo Foucault Tester Telescope Gallery SPAC Library

  Paul tuning up the Meade 16 inch focuser
Paul really got into this project. He stopped the trunnions from slipping on the tube and fixed the
focuser. Clearwater Fundamental Middle School has a monster telescope ready for the sky now.

  George Fatolitis cleaning 16 inch Meade mirror
George brought in a Meade 16inch Dobsonian telescope from Clearwater Fundamental Middle School. The
mirror was coated with dust and the mechanics of the telescope need a bit of work. After a couple
hours of work it all came together and George left with a beautiful telescope for sharing he night
sky with the kids.

  Ralph, Tom and Mike polishing mirrors
We had three polishers (two figuring), two grinders and repaired a 16inch Meade Dob for a local
Middle School this week. It was busy at the Mirror lab!

  Brad finishes his 8 inch mirror!
Brad finished his 8 inch mirror Saturday. It is extremely well polished and has a one seventh wave
figure with beautiful edge. Congratulations Brad!

  Eighty-five pound pitch lap press
Sometimes the pitch lap needs a little help getting back into a shape that matches the mirror. The
mesh makes nice micro channels. After removing the weights and mesh we usually press again for a
few minutes flatten out any pitch lifting caused by removing the mesh. We also like to keep the
polishing room between 80 and 82 degrees F.

  Tom nears final figuring
Tom is in the final stages of polishing. His 8 inch mirror has a slight (~200nm) turned down edge
and mirror on top with a short center over center stroke will correct that quickly.

  Mike with his 12.5 inch light weight mirror
This shows the light weight 12.5 inch mirror batter. Mike cast the mirror and has been perfecting
the honey comb pattern.

  Mike polishing a 12.5 inch wih a light weight sub-diameter tool
The light weight tool is needed to prevent uneven polishing where the glass is hollowed out on the
back and the surface is thinner.

  Zerodur mirror finished for a lab scope
Ralph (left) and Allen finished a 12 inch Zerodur mirror. This f4.4 mirror will stay with us at the
lab as a demo scope and for public viewing nights. It came in at 1/7th wave and is very smooth and
well polished.

  Two polishers
Brad Lytle (left), Mike Davis (right) polish their mirrors and John ONeill visits the lab.

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