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Thornfield HouseDorr Puma 8x42 Waterproof Roof Prism Binoculars
Our Price: £119.50
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The Dorr Puma 8x42 is a waterproof roof prism binocular for birdwatching, walking and general nature watching. It gives a wide, bright view at a price that leaves room for a good strap and a field guide.
At 8x the image is steady in the hand and easy to scan, and the 141m field of view at 1000m makes it simpler to find a bird in a hedge or follow one in flight. The 42mm objectives give a 5.25mm exit pupil, bright enough for woodland and overcast days.
The magnesium alloy body is rubber armoured and sealed to 1m for 30 minutes, then filled with nitrogen so the lenses do not mist up inside when you come in from the cold.
The roof prisms are made from BaK-4 glass, which gives a round, evenly bright exit pupil. Phase coating keeps the image sharp and contrasty, and the dielectric mirror coating helps colours look natural. All lens surfaces are fully multicoated.
Twist-up eyecups set the right eye distance. Leave them down if you wear glasses, twist them up if you do not. A dioptre adjustment on the right eyepiece corrects for differences between your eyes.
The Puma 8x32 is lighter at 485g with a similar wide view. The Puma 10x42 brings distant birds closer for estuaries and open country. The Puma 8x56 is the one for dawn, dusk and night watching.
Binoculars, carry bag, neck strap, eyepiece and objective caps, and a cleaning cloth. A 1/4 inch thread under the focus wheel takes a tripod adapter.

| Magnification | 8x |
| Objective lens diameter | 42mm |
| Exit pupil | 5.25mm |
| Field of view at 1000m | 141m |
| Angle of view | 8.1° |
| Prism type | BaK-4 roof prisms |
| Prism coating | Dielectric and phase coated |
| Lens coating | Fully multicoated |
| Waterproof | Yes, to 1m for 30 minutes |
| Fog-proof | Yes, nitrogen filled |
| Housing | Magnesium alloy, rubber armoured |
| Eyecups | Twist-up, suitable for glasses wearers |
| Dioptre adjustment | Yes |
| Tripod thread | 1/4 inch, under the focus wheel |
| Light transmission | Over 86% |
| Maximum interpupillary distance | 74mm |
| Dimensions | 13 x 14.5 x 5.5cm |
| Weight | 685g |
| In the box | Bag, strap, eyepiece and objective caps, cleaning cloth |
8x42 is easier to hold steady and shows more of the scene, which suits woodland, gardens and birds in flight. 10x42 brings things closer and suits estuaries, coasts and open country.
Yes. They are sealed to 1m for 30 minutes and nitrogen filled, so rain will not get in and the lenses will not fog inside.
Yes. Twist the eyecups down when wearing glasses so your eyes sit at the right distance from the eyepieces.
8x42 is the most popular size for birdwatching because it balances brightness, field of view and weight. The Puma's wide view makes finding birds quick.
About 685g.
Yes. Unscrew the cap under the centre focus wheel to reveal a 1/4 inch thread, then fit a binocular tripod adapter.
Roof prisms split light in a way that slightly softens contrast. Phase coating corrects that, so the image looks crisper.
They will show the Moon and bright star clusters well. For serious night use the Puma 8x56 gathers more light.
Genuine UK stock, sold by people who actually use this gear -- not a general electronics marketplace.
Walk in and try before you buy at our Sheffield store, or order online with free UK mainland delivery on orders over £50.
Have equipment to trade? Part-exchange against a new camera or sell your gear for a bank transfer.
Every new item comes with the full UK manufacturer warranty, not a grey-import or parallel-import version.


