OPTICAL SYSTEM

 

Aperture 12.5 inch (315 mm) 

 

Focal Length 2850 mm 

 

Focal ratio f/9

 

Central Obstruction 39%  

 

Back Focus from Primary mirror Surface  (350 mm) 

 

OTA Length 31 inch (787 mm) 

 

Optical Tube Carbon Fiber 

 

Dimensions Overall Dimensions (PDF) 

 

Weight (includes manual-focuser and two dovetails)  (25 kg) 

 

 

PRIMARY MIRROR

 

Diameter 12.5" inch (318 mm) 

 

Clear Aperture  (315 mm) 

 

Focal ratio f/3 

 

Mounting Laser Collimated and Permanently Fixed 

 

Material Precision Annealed Supremax

 

Coating Enhanced Aluminum - 96% 

 

 

SECONDARY MIRROR

 

Diameter  (120 mm) 

 

Material Precision Annealed Supremax

 

Shape Hyperbolic 

 

Coating Enhanced Aluminum - 96% 

 

 

LENS GROUP (Flattner optional)

 

Diameter 63 mm  0.75x 

 

Number of lenses 3 

 

Coating Broadband AR Coatings (less than .5% reflected from 400 to 

 

700nm)

 

 

 

 

ACCESSORIES : Focuser Feather Touch 3"

 

                            Black Shroud dust cover

                            Wooden case for wordwide shipping

 

                            Optics test report

 

                            Warranty 2 years