A new apochromatic refractor with high performance Super-ED glass (= SD). The FPL53 glass reproduces an extremely clear and sharp image by an exceptionally high degree of elimination of residual chromatic aberrations. The advantage of these SD refractors is their short length and low weight. The SD glass is designed to bring all beams of violet, red, blue, yellow and green very precisely together on the same plane. The special lens material, reduces chromatic aberration across all colors. In combination with the new optional SD Reducer HD Kit or SD Flattener HD, these refractors allow illumination with a 44mm image circle for full format SLR cameras.
FEATURES
Lens diameter: 103mm
Type of coating: Multi-coated
Focal length: 795 mm (f7.7)
Resolution: 1.13 arc seconds
Visual limit value: 11.8 mag
Max. magnification: 206x
Tube length: 810mm
Tube diameter: 115mm
Tube weight: 5,4kg
Viewfinder telescope: 7x50 with illumination unit
Adapter 7.0 degrees FOV included
Connections/adapters: thread 60mm and 31.7mm for T-ring
Eyepiece adapter: 50.8mm (2 inches) and 31.7mm (1.25 inches)