Celestron Cometron 12x70 specs and field of view
At 49.3 oz with a 5.8 mm exit pupil and a 29 twilight factor, the Cometron 12x70 is built for light gathering over portability.
- Field of view
- 241 ftat 1,000 yd
- Eye relief
- 19.6 mm
- Close focus
- 59 ft
- Weight
- 49.3 oz
- Exit pupil
- 5.8 mmcalculated
Why pick it
- 19.6 mm eye relief, enough for glasses
Who the Cometron 12x70 suits
Night sky scanning suits the 70 mm lenses and 5.8 mm exit pupil. The 19.6 mm eye relief leaves room for eyeglasses, and a tripod helps at 12 power.
No waterproof rating is listed, the close focus is 59 ft, and the 241 ft field is narrow.
Cometron 12x70 or another model: the best binoculars by maker figures shows how the popular ones differ. Celestron lists it in the under $100 price band, alongside the models in best binoculars under $100.
Cometron 12x70 specifications
Cometron 12x70 figures as Celestron prints them; rows marked * are calculated from the 12x70 size.
| Magnification | 12x |
|---|---|
| Objective lens | 70 mm |
| Prism type | Porro |
| Field of view | 241 ft at 1,000 yd (80 m at 1,000 m) |
| Angular field of view | 4.6° |
| Apparent field of view | 55° * |
| Eye relief | 19.6 mm |
| Close focus | 59 ft (18 m) |
| Eye spacing range | 56 to 72 mm |
| Weight | 49.3 oz (1,398 g) |
| Maker list price | under $100 |
| Exit pupil | 5.8 mm * |
| Twilight factor | 29 * |
| Relative brightness | 34 * |
* Calculated from the size, not printed by the maker.
Other sizes of the Cometron
Celestron makes the Cometron 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 Cometron 12x70 | 12x70 | 241 ft | 19.6 mm | 59 ft | 49.3 oz | 5.8 mm | |
| Celestron Cometron 7x50 | 7x50 | 344 ft | 13 mm | 26.2 ft | 27.3 oz | 7.1 mm | Check price on Amazon |
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Cometron 12x70 questions
Cometron 12x70: does it work with glasses?
Cometron 12x70 has 19.6 mm of eye relief, which meets the 16 mm the RSPB advises for people who wear glasses.
Cometron 12x70: what does 12x70 mean?
Cometron 12x70 magnifies 12 times through 70 mm front lenses, which works out to an exit pupil of 5.8 mm, the width of the beam of light that reaches each eye.