Celestron SkyMaster Pro 20x80 specs and field of view
The SkyMaster Pro 20x80 is waterproof and nitrogen filled, weighs 86.4 oz and offers a 168 ft view, making it the sealed counterpart to the 75 oz SkyMaster 20x80.
- Field of view
- 168 ftat 1,000 yd
- Eye relief
- 15.5 mm
- Close focus
- 66.2 ft
- Weight
- 86.4 oz
- Exit pupil
- 4 mmcalculated
Why pick it
- Waterproof
- Takes a tripod adapter
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Who the SkyMaster Pro 20x80 suits
A calculated twilight factor of 40 and 15.5 mm of eye relief suit tripod astronomy in damp conditions. The close focus of 66.2 ft is shorter than the non-Pro 108 ft.
Weight of 86.4 oz makes handheld use impractical, and the field of 168 ft is narrower than the 195 ft on the non-Pro version.
SkyMaster Pro 20x80 is one choice among many, and the top binoculars compared covers the most popular ones. Celestron lists it in the $200 to $500 price band, alongside the models in best binoculars under $500.
SkyMaster Pro 20x80 specifications
SkyMaster Pro 20x80 figures as Celestron prints them; rows marked * are calculated from the 20x80 size.
| Magnification | 20x |
|---|---|
| Objective lens | 80 mm |
| Prism type | Porro |
| Field of view | 168 ft at 1,000 yd (56 m at 1,000 m) |
| Angular field of view | 3.2° |
| Apparent field of view | 64° * |
| Eye relief | 15.5 mm |
| Close focus | 66.2 ft (20.2 m) |
| Eye spacing range | 56 to 72 mm |
| Weight | 86.4 oz (2,449 g) |
| Waterproofing | Waterproof |
| Fog-proofing gas | Nitrogen |
| Tripod adaptable | Yes |
| Maker list price | $200 to $500 |
| Exit pupil | 4 mm * |
| Twilight factor | 40 * |
| Relative brightness | 16 * |
* Calculated from the size, not printed by the maker.
SkyMaster Pro 20x80 against other 20x80 binoculars
SkyMaster Pro 20x80 shows 168 ft at 1,000 yd, below the 173 ft median of the 4 20x80 models in the chart. At 86.4 oz it is heavier than the 80.7 oz median for the size.
SkyMaster Pro 20x80 and its nearest rivals
SkyMaster Pro 20x80 next to the 20x80 models closest to it in maker list price, with the best figure in each column in bold.
| Model | Field of view | Eye relief | Close focus | Weight | Exit pupil | Maker list price | Amazon |
|---|---|---|---|---|---|---|---|
| Celestron SkyMaster Pro 20x80 | 168 ft | 15.5 mm | 66.2 ft | 86.4 oz | 4 mm | $200 to $500 | Check price on Amazon |
| Celestron SkyMaster Pro ED 20x80 | 178 ft | 15.4 mm | 98.4 ft | 123.2 oz | 4 mm | $200 to $500 | Check price on Amazon |
| Celestron SkyMaster 20x80 | 195 ft | 18 mm | 108 ft | 75 oz | 4 mm | $200 to $500 | Check price on Amazon |
| Steiner M2080 | 160 ft | 197 ft | 68.1 oz | 4 mm | over $2,000 |
Other sizes of the SkyMaster Pro
Celestron makes the SkyMaster Pro in 2 sizes; a larger front lens adds brightness and weight, and more magnification narrows the view.
| Model | Size | Field of view | Eye relief | Close focus | Weight | Exit pupil | Amazon |
|---|---|---|---|---|---|---|---|
| Celestron SkyMaster Pro 20x80 | 20x80 | 168 ft | 15.5 mm | 66.2 ft | 86.4 oz | 4 mm | Check price on Amazon |
| Celestron SkyMaster Pro 15x70 | 15x70 | 231 ft | 17 mm | 49.2 ft | 51 oz | 4.7 mm | Check price on Amazon |
Lists that include the SkyMaster Pro 20x80
Celestron binoculars
SkyMaster Pro 20x80 questions
SkyMaster Pro 20x80: does it work with glasses?
SkyMaster Pro 20x80 has 15.5 mm of eye relief, under the 16 mm the RSPB advises for people who wear glasses, so the edge of the view may be cut off with glasses on.
SkyMaster Pro 20x80: what does 20x80 mean?
SkyMaster Pro 20x80 magnifies 20 times through 80 mm front lenses, which works out to an exit pupil of 4 mm, the width of the beam of light that reaches each eye.
SkyMaster Pro 20x80: can it go on a tripod?
SkyMaster Pro 20x80 is tripod adaptable according to Celestron, so it accepts a binocular tripod adapter.