Cassegrain - Dall Kirkham 11"   f/12

 

PRICE €. 2970,00  net vat

 

 

Instruments mechanical data (PDF)

OPTICAL SYSTEM

 

Aperture 11" inch (280mm) 

 

Focal Length 3400mm 

 

Focal ratio f/12

 

Central Obstruction 29%  

 

Back Focus from Primary mirror Surface  (250 mm) 

 

OTA Length 716 mm 

 

Optical Tube Carbon Fiber 

 

Dimensions Overall Dimensions (PDF) 

 

Weight  (15 kg) 

 

 

PRIMARY MIRROR

 

Diameter 11 inch (282 mm) 

 

Clear Aperture  (280 mm) 

 

Focal ratio f/3 

 

Mounting Laser Collimated and Permanently Fixed 

 

Material Precision Annealed Supremax

 

Coating Enhanced Aluminum - 96% 

 

 

SECONDARY MIRROR

 

Diameter  (77.25 mm) 

 

Material Precision Annealed Supremax

 

Shape ellipsoid 

 

Coating Enhanced Aluminum - 96% 

 

 

 

 

 

 

 

ACCESSORIES : Focuser moonlight 2" 

 

                            N.3 cooling fan + power supply

 

                            1 vixen dovetail plate

 

                            Wooden case for wordwide shipping

 

                            Optics test report

 

                            Warranty 2 years

 

 

 

 

OPTIONAL ACCESSORIES:  Optical flat window

 

Type glass: BK7- Double side accuracy wave 1/5 lambda at 530nm