Precision Applied Products

​​​​​355-B W. Crowther Ave.

Placentia, CA 92870

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Wooden Refractor
​Get Your Scope Ordered Today!

​Super Apochromat Refractor

optimized for color free viewing

 extended wavelength design using ED materials.

Apochromat Refractor Ray Fan

Apochromat Refractor Ray Fan Plot

Apochromat Refractor Spot Diagram

Apochromat Refractor Spot Diagram

​Precision Applied Products F-7 Apochromatic OTA​​​

​Limited Quantity On Scopes We Build

Apochromatic Scope

​​To keep our quality high and make sure we delivery on time we only manufacture limited quantities of Apochromat Optical Tube Assemblies.

Apochromatic Refractor

​On any scope you can order either a polished brass ​or maple hardwood focuser backing plate

Apochromatic Refractor

​All scopes come with optical coatings applied on every element optimized for each glass type to maximize transmission and contrast.

​100mm F-7 Apochromatic OTA​​​

​120mm F-7 Apochromatic OTA​​​ 

​140mm F-7 Apochromatic OTA​​​


  1. ​Virtually Color Free Viewing
  2. ​Baffles Computer Stray Light Optimized
  3. ​All Lenses Anti-Reflection Coated For Maximum Transmission
  4. Fast Delivery 5 to 7 months
  5. Excellent Prices

Apochromatic Refractors We Build

Color free refractor objectives from small to large for over 35 years
Polishing a block of windows
​Built for you
Centering your lens
​Centering your lens
Pete Holding Refractor Tube Assembly

​Precision Applied Products 140 mm F-6

 Apochromatic tube assembly. Made entirely in our shop with meticulous details. Our main focus is on how well we center the lenses compared to the mechanical axis. This is done to assure perfect collimation. The lenses are centered to within 2 microns of each other and the cell.