Celestron SkyMaster 25x70 specs and field of view
The SkyMaster 25x70 narrows its view to 141 ft at 25x magnification.
- Field of view
- 141 ftat 1,000 yd
- Eye relief
- 13 mm
- Close focus
- 75 ft
- Weight
- 52 oz
- Exit pupil
- 2.8 mmcalculated
Why pick it
- Takes a tripod adapter
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Who the SkyMaster 25x70 suits
Observers who want close lunar detail from a tripod get a twilight factor of 41.8, calculated, at the $100 to $200 maker list price band. Its 52 oz weight is manageable on a mount.
A calculated exit pupil of 2.8 mm is small, 13 mm of eye relief is short for glasses, and the 75 ft close focus excludes nearby subjects.
SkyMaster 25x70 is one choice among many, and the top binoculars compared covers the most popular ones. Celestron lists it in the $100 to $200 price band, alongside the models in best binoculars under $200.
SkyMaster 25x70 specifications
SkyMaster 25x70 figures as Celestron prints them; rows marked * are calculated from the 25x70 size.
| Magnification | 25x |
|---|---|
| Objective lens | 70 mm |
| Prism type | Porro |
| Field of view | 141 ft at 1,000 yd (47 m at 1,000 m) |
| Angular field of view | 2.7° |
| Apparent field of view | 68° * |
| Eye relief | 13 mm |
| Close focus | 75 ft (23 m) |
| Eye spacing range | 56 to 72 mm |
| Weight | 52 oz (1,474 g) |
| Waterproofing | Water Resistant |
| Tripod adaptable | Yes |
| Maker list price | $100 to $200 |
| Exit pupil | 2.8 mm * |
| Twilight factor | 41.8 * |
| Relative brightness | 7.8 * |
* Calculated from the size, not printed by the maker.
Other sizes of the SkyMaster
Celestron makes the SkyMaster in 5 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 25x70 | 25x70 | 141 ft | 13 mm | 75 ft | 52 oz | 2.8 mm | Check price on Amazon |
| Celestron SkyMaster 12x60 | 12x60 | 278 ft | 17 mm | 59 ft | 39.2 oz | 5 mm | Check price on Amazon |
| Celestron SkyMaster 15x70 | 15x70 | 231 ft | 18 mm | 43 ft | 48 oz | 4.7 mm | Check price on Amazon |
| Celestron SkyMaster 20x80 | 20x80 | 195 ft | 18 mm | 108 ft | 75 oz | 4 mm | Check price on Amazon |
| Celestron SkyMaster 25x100 | 25x100 | 156 ft | 15 mm | 80 ft | 140 oz | 4 mm | Check price on Amazon |
Celestron binoculars
SkyMaster 25x70 questions
SkyMaster 25x70: does it work with glasses?
SkyMaster 25x70 has 13 mm of eye relief, well short of the 16 mm the RSPB advises for people who wear glasses.
SkyMaster 25x70: what does 25x70 mean?
SkyMaster 25x70 magnifies 25 times through 70 mm front lenses, which works out to an exit pupil of 2.8 mm, the width of the beam of light that reaches each eye.
SkyMaster 25x70: can it go on a tripod?
SkyMaster 25x70 is tripod adaptable according to Celestron, so it accepts a binocular tripod adapter.