- 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") Rack & Pinion Focuser with 1:10 Dual Speed microfocuser, 80 mm (3.2")Focuser Travel Length, 360° Rotatable Design
- 1.25" Adapter - Brass Compression Rings
- L-type Mount - Integrated L Bracket (fits SmartEQ mount)
- Field Stops - Baffles
- Tube Diameter - 93 mm (3.66")
- Tube Length - 310 mm Fully Retracted, 355 mm Fully Extended
- Tube Weight - 6 lbs. (2.7 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
||Width, not more, mm
|Total length, not more
||1/4 of total lens diameter.
Quantity no more 3
|Dots or spot points
||No more, mm
|Quantity, no more
|Accumulation of defects
||Limited area, mm
|Total area of scratches and points, no more, square mm