Celestron SkyMaster Pro ED 20x80 specs and field of view
At 123.2 oz with an 80 mm lens and a 40 twilight factor, the SkyMaster Pro ED 20x80 is the heaviest and highest in light gathering of its series.
- Field of view
- 178 ftat 1,000 yd
- Eye relief
- 15.4 mm
- Close focus
- 98.4 ft
- Weight
- 123.2 oz
- Exit pupil
- 4 mmcalculated
Why pick it
- 178 ft view, wider than the typical 173 ft
- Waterproof
- ED glass
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Who the SkyMaster Pro ED 20x80 suits
Deep sky viewing from a fixed tripod suits the 20 power and 80 mm lenses. The 4 mm exit pupil and 15.4 mm eye relief are workable, and the IPX7 rating covers damp nights.
The 123.2 oz body, 178 ft field and 98.4 ft close focus rule out handheld and daytime use.
SkyMaster Pro ED 20x80 or another model: the best binoculars by maker figures shows how the popular ones differ. Celestron lists it in the $200 to $500 price band, alongside the models in best binoculars under $500.
SkyMaster Pro ED 20x80 specifications
SkyMaster Pro ED 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 | 178 ft at 1,000 yd (59 m at 1,000 m) |
| Angular field of view | 3.4° |
| Apparent field of view | 68° * |
| Eye relief | 15.4 mm |
| Close focus | 98.4 ft (30 m) |
| Eye spacing range | 56 to 72 mm |
| Weight | 123.2 oz (3,492 g) |
| Extra-low dispersion glass | Yes |
| Waterproofing | Waterproof (IPX7) |
| 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 ED 20x80 against other 20x80 binoculars
SkyMaster Pro ED 20x80 shows 178 ft at 1,000 yd, at or above the 173 ft median of the 4 20x80 models in the chart. At 123.2 oz it is heavier than the 80.7 oz median for the size.
SkyMaster Pro ED 20x80 and its nearest rivals
SkyMaster Pro ED 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 ED 20x80 | 178 ft | 15.4 mm | 98.4 ft | 123.2 oz | 4 mm | $200 to $500 | Check price on 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 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 ED
Celestron makes the SkyMaster Pro ED in 3 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 ED 20x80 | 20x80 | 178 ft | 15.4 mm | 98.4 ft | 123.2 oz | 4 mm | Check price on Amazon |
| Celestron SkyMaster Pro ED 7x50 | 7x50 | 409 ft | 20.8 mm | 26.2 ft | 44.3 oz | 7.1 mm | Check price on Amazon |
| Celestron SkyMaster Pro ED 15x70 | 15x70 | 230 ft | 15.7 mm | 42.7 ft | 73.7 oz | 4.7 mm | Check price on Amazon |
Celestron binoculars
SkyMaster Pro ED 20x80 questions
SkyMaster Pro ED 20x80: does it work with glasses?
SkyMaster Pro ED 20x80 has 15.4 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 ED 20x80: what does 20x80 mean?
SkyMaster Pro ED 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 ED 20x80: can it go on a tripod?
SkyMaster Pro ED 20x80 is tripod adaptable according to Celestron, so it accepts a binocular tripod adapter.