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Zenithstar 71 Doublet ED - Twenty Years Anniversary Edition

In stock
SKU
A-Z71A-VP20A
Now Only $558.00 Regular Price $598.00
More Information
Specification
Aperture 71mm
Focal Ratio F/5.9
Focal Length 418 mm
Objective Type ED Doublet, Air Spaced, 
Fully Multi-Coated, SMC coating.
Resolving Power 1.58"
Limiting Magnitude 11
Lens Shade Retractable
Focuser 50.8mm(2") Anniversary V-Power Focuser
with 1:10 Dual Speed microfocuser 
45 mm(1.77") Focuser Travel Length
1.25" Adapter Brass Compression Rings
L-type Mount

Integrated L Bracket - Length 90mm (Vixen Style fits SmartEQ mount)

Field Stops Baffles
Tube Diameter 93 mm (3.66")
Tube Length 300 mm Fully Retracted
340 mm Fully Extended
Tube Weight 4.96 lbs. (2.25 kg)

Specification for Apochromatic Lenses

All WO refractors objective are double tested and inspected before shipping to our customer, these telescopes are free of coma and astigmatism.
Since all individual lens surfaces are machine coated sometime it could have visual imperfections which do not affect the objective optical performance.

Dimensions of scratches and points shall not exceed the following values:


Surface finish class Scratches Points Accumulation of defects Width,not more, mm Total length, not more, mm, Diameter no more,mm, Quantity, no more Diameter. 

 

Scratches Width, not more, mm 0.025mm
Total length, not more 1/4 of total lens diameter. 
Quantity no more 3
Dots or spot points No more, mm 0.4mm
Quantity, no more 3
Accumulation of defects Limited area, mm 0.8mm^2
Total area of scratches and points, no more, square mm 5.8mm^2

 

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