Optical Info
Optical Design: Apochromatic
Lens Coatings: Fully multi-coated
Lens Design: ED Doublet (Air Spaced)
Glass Type: ED Doublet
Optical Quality: Diffraction limited (1/4 wave)
Collimatable Cell: Yes (Push/Pull Cell)
Primary Aperture (mm): 82
F/Ratio: 6.45
Focal Length (mm): 530
Observational Info
Dawes Limit: 1.41
Rayleigh Limit: 1.7
Limiting Mag.: 12
Minimum Magnification: 12x
Maximum Magnification: 161xLight Gathering (compared to next size down) 75% (compared to Evolux 62ED)
Mechanical Specifications
Focuser: 2.4" Dual Speed (11:1) Rack & Pinion
Focuser: Rotatable? No
Compression Ring: Yes
Retractable dew shield: Yes
OTA material: Aluminum
OTA Length (Retract/Ext.): 16.375"/22.25"
Dew Shield diameter (mm): 100mm
OTA Diameter: 90mm
OTA Weight (with accessories): 6.5 lbs
Mounting rings: Yes
Dovetail type: V-style dovetail
Dovetail length: 6"
Optional Corrector/Reducer Specifications
Corrector Name: Evolux 82ED 0.9x reducer kit
Optional Corrector/Reducer: SKU S20207
Reduction (reducer only): 0.9x
Corrector - insertable or thread-on: Thread-on
Corrector thread size: M56x1 female/M48 male
Corrector back focus: 55mm
Corrector illuminated field: 36mm
Includes one ED element: Yes
F/Ratio with reducer installed: 5.8
Focal Length with reducer installed: 477mm
Corrector adapter needed? Yes
Corrector allow for 2" filters? No (Adapter included with reducer)
- Hard case included for your travel or storage needs
SkyWatcher Limited Warranty
This two-year limited warranty is valid to U.S.A. customers who have purchased this product from an authorized Sky-Watcher USA dealer in the U.S.A.
