Pentax – the manufacturers of optic products and other imaging systems is been known to be a well-established brand of UK. Among its wide category of products and the many series of binoculars, its innovation is not been sustained. It still surprises its customers with many captivating models with the unique design. So is the existence of Pentax FB-7 Pocket-Sized Lite Binocular that is been reviewed.

Product overview: Bringing the meaning of ‘Small things makes wonders’ as the understatement, this Binocular is been designed as small as a credit card. It just weighs 150 grams that is less than the weight of a pen in the pocket. This product is one among the two models that is been available in the ‘FB Series’ of the brand. With the dimension of 95 x 64 x 26.5 mm as height, width and depth, it can easily slide into even the small pockets. The silver finish gives a modish appearance.

Pentax FB-7 Lite Binocular

Aperture and Magnification: These two basic specifications bring out the performing ability of the binocular. Pentax FB-7 Lite Compact Size Binocular comes with 17mm and 7x respectively. Among many compact models, the aperture of this product is impressive. In case of the magnification it offers to magnify the viewing image 7 times larger than its original size. One may conclude that it is good for the theatre observation but it also delivers the same output during the general outdoor observation.

Prism type / lens: Designed with the Roof prism technology, it supports the compact and lightweight qualities of this product. The present here slide opens and can be set to match the width of the viewing eyes. The rectangular image field is been obtained because of the shape of the lens. Further, the eye-distance adjustment ranges between 57 – 70mm.

Other technical aspects: Along with these are the many other technical detail that defines this product as an efficient one. They are as follows.

  • Field of view – It shows a field of view of 124m at the distance of 1000m. The area that is been covered during the observation is large enough for the compact device and hence those moving things can be observed easily.
  • Close focus – For about 1.8m, close the objects can be viewed clearly and not closer than that.
  • Exit pupil – This is the area found inside and the center of the objective lens, it measures to be 2.4 x 1.6 mm. It performs in capturing the light for the viewing image. The larger the size of the exit pupil, the brighter will be the view.
  • Relative brightness – On account of the light gathering ability, Pentax FB-7 Lite 7x17 mm Binocular shows a relative brightness of 4.5.
  • Eye relief – The comfort of viewing is been determined by the eye relief and it goes the same in the direct proposition. The higher the value the better is the comfort especially for the spectacle wearers. This Binocular comes with 11mm eye relief.

Verdict: It is simple to use and the adjustments are through the central wheel that brings easy focus. Although compact, it offers edge-to-edge viewing with the required brightness, clarity and sharpness. The built-in dioptre adjustment is another added feature. The price tag also makes it go positive.

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Pentax FB-7 Lite Roof Prism Binocular - Specification Details

Manufacturer Pentax
Model Name FB-7 Lite Binocular
Prism type Roof
Colour / Finish Silver
Type Ultra compact pocket size
Magnification 7x
Diameter of Objective Lens 17mm
Dimension (HxWxD) mm 95 x 64 x 26.5 mm
Relative brightness 4.5
Field of view @ 1000m 124m
Optical Coating Fully multi coated
Focus system Center
Dioptric Built-in
Weight 148 grams
Exit pupil 2.4 x 1.6 mm
Applications Travel, bird watching and general outdoor
Rubber armouring No
Close focus 1.8 m
Eye-distance adjustment range 57 - 70mm

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