The Celestron Royal Observatory 7x50 Porro Binoculars is a classic 7x50 Porro-prism binocular produced in partnership with Royal Observatory Greenwich. The 50mm objectives and 7mm exit pupil suit relaxed low-light viewing, astronomy, nature observation and general outdoor use.
7x50 Porro-Prism Design
The combination of 7× magnification and 50mm objective lenses provides a bright, steady view with a generous 6.6° angular field. BK7 prisms and coated optics support good everyday contrast and colour.
Comfortable Wide-Field Viewing
A 7mm exit pupil and 14mm stated eye relief make this model well suited to scanning star fields and following broad terrestrial scenes. The interpupillary distance adjusts from 56mm to 72mm, with a dioptre adjustment for balancing the two eyes.
Outdoor and Astronomy Use
The binocular is described as water resistant, but it is not nitrogen filled and should not be treated as waterproof or fog-proof. A standard tripod adapter can be fitted for longer observing sessions; the adapter and tripod are sold separately.
Royal Observatory Greenwich Edition
The special-edition body carries Royal Observatory Greenwich branding. Its included case, strap, lens caps and cleaning cloth make it ready for travel and storage.
Weight Guidance
Celestron’s current product page does not publish a weight. The 0.68kg Shopify value comes from a current exact-model UK retailer listing, which separately states a boxed weight of 0.884kg. Confirm the shipping weight from stock if postage is calculated closely.
What Is Included?
- Royal Observatory Greenwich 7x50 Porro binoculars
- Carrying case
- Neck strap
- Objective-lens caps
- Eyepiece caps
- Lens cloth
- Instruction manual and quick setup guide
Please note: Only the items listed above are stated as included. A smartphone is not included with app-guided telescopes. Optional adapters, tripods, eyepieces and other accessories are sold separately unless explicitly listed.
Specifications
| Magnification | 7× |
|---|---|
| Objective-lens diameter | 50mm |
| Prism type | Porro |
| Prism glass | BK7 |
| Optical coatings | Coated optics |
| Angular field of view | 6.6° |
| Linear field of view | 116m at 1,000m |
| Exit pupil | 7mm |
| Eye relief | 14mm |
| Close focus | 10m |
| Interpupillary-distance range | 56–72mm |
| Dioptre adjustment | ±3 |
| Water resistance | Water resistant; not nitrogen filled |
| Tripod adaptability | Yes; adapter sold separately |
| Dimensions | Approximately 173 × 74 × 137mm according to current matched UK listing |
| Binocular weight | Approximately 680g according to current matched UK listing |
| Boxed weight | Approximately 884g according to current matched UK listing |
Solar Safety
Warning: Never look directly at the Sun through this optical instrument without a correctly fitted, certified full-aperture solar filter.
Permanent and irreversible eye damage can occur. Never use an eyepiece-type solar filter and never project sunlight through the instrument. Cover or remove finder devices during properly filtered solar use.
Never leave the instrument unattended, especially when children are present.
Instruction Manuals
Official documents are supplied in English, French, German, Italian and Spanish.