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Fujinon 15x 60 mm HB BinocularFujinon is a well regarded maker of medical, photographic and sports optics products. Their HB series of binoculars are their result of efforts to develop a product line suitable for the demanding applications of the naturalist and hunter where the binocular may be subjected to shock, vibration, and environmental extremes hence their HB (Hunting Binocular) suffix. These are center focus roof prim arrangements offering a good balance of optical performance with cost, waterproof Military Spec. robust construction. The 15x 60 HB is the largest member of the series meeting the demanding needs of those who must smaller objects nearby, or study farther objects over great expanses. The 15x 60 mm HB is a good choice for law enforcement long distance surveillance, coast watching, mountainside observing, and low light nature observation. They are comfortable to grip and balance well in the hand, and these feel reassuringly firm in the hand complemented by their non slip coverings and recessed thumb pads. However, for extended sessions these are more at home on a tripod. And also because of it comparatively high 15x magnification it is not recommended by Company Seven for use on unstable platforms including small water craft.
Right: Fujinon 15x 60 mm HB Binocular view from front with provided Objective Covers flipped open (114,098 Bytes).
This can also be used for several astronomical applications although the purist who can own more than one binocular should consider the similarly priced and better performing Fujinon 16x 70 mm FMT-SX individual focus binocular. With the 15x 60 HB the planet Jupiter appears as a small disc surrounded by four dots its larger moons, Mars is a distinctly red disc, and the elongated disc of Saturn can be identified too. One can identify many features on the moon and explore the terminator. The 15x 60 mm HB takes one from a naked eye visual magnitude limit of about 5-½ to reign deep sky objects as faint as magnitude 11 or so depending on the observers' eyes and local seeing condition. We have offered some better binoculars than these - maybe 20 or even 40 percent better such as the Carl Zeiss 15x 60 B/GA, but at 100 percent or more the cost; the Fujinon HB should be a serious contender for your dollar.
These employ a refined doublet objective lens arrangement feeding high transmission roof prisms. Fujinon's multilayer electron beam deposited antireflection coatings are applied to all air to glass surfaces assuring a high percentage of light throughput and the elimination of ghost images or glare. The prisms have permanent phase correcting coatings to insure all visible colors of the wavelength pass through more uniformly.
The front end is matched to a pair of well corrected eyepieces providing enough eye relief to suit most who wear prescription or sun glasses. The eyepieces of the 15x 60mm HB are constructed of five optical glass lens elements providing a field of view of 4 degrees, most of this uncommonly sharp and clear more so for a binocular of this comparatively moderate cost. These display less pincushion distortion than most competing models in their class so one has to work to see what little there is of it - but if you look carefully when panning then a slight bending of the image may appear towards the edges of the field of view. The Fujinon 15x 60 mm HB provides an actual field of view of 4 degrees making it fairly easy to acquire and center a distant target in the eyepiece; keep in mind that even the best competing 15x Roof and Porro prism models do not exceed 4.5 degrees.
The color correction of the HB is quite good too. When carefully focused on a black bird in a tree contrasted against a light blue sky you will not observe any obvious secondary color fringing. The terminator of the Moon for example is sharp, crisp, and three dimensional contrasted against the blackness of space. The end result is a high degree of contrast, clarity and sharpness across most of the field of view with striking three dimensional images.
Right: Fujinon 15x 60 mm HB Binocular Focus and Diopter adjusting wheels. Eye Cups shown extended (90,215 bytes).
To adjust focus and diopter settings:
2. For those whose eyes differ in correction* and who wish to do without prescription glasses, look through the binocular at a target and adjust the focus dial so that the left eye sees the image sharp and clear. Then while concentrating on the view through the right eye, turn the Diopter Dial back and forth (taking care not to touching the focus dial) until the image is most sharp and clear. Alternatively, those who know their prescription can dial this difference between the left and right eye (+1, 2, or -1, -1-½, etc.) into the diopter scale.
* Persons with astigmatism may have to use prescription glasses with any binocular to obtain the best result.
The HB central focus mechanism works smoothly and does not feel cheap or plastic.
The eye relief (distance from the eyepiece lens to the eye) of 16.3 mm is adequate for those who do not need to wear glasses and will accommodate many spectacle (prescription or sun glass) wearers too. In our experience the 15x 60 mm HB eyepieces are by design very sensitive to having the observer properly lined up on axis to the eyepiece and at the nominal distance from the eye lens. If one moves in too close or pulls away too far from the eyepiece then vignetting or shading of portions of the field of view will become noteworthy distractions. The eyecups extend and retract to suit the observer, and these have détentes which can hold the eyecup at the desired extension. With a little practice one will find their nominal eyecup orientation and eye placement.
Given reasonable care, then these binoculars can provide a decades of good service that is simply no likely to be matched by comparatively priced center focus models.
Right: Fujinon Tripod Adapter provided with the 15x 60 mm HB binocular set (77,013 Bytes).
Fujinon recognized the desirability of having this accessory, and to their credit they include the Tripod Adapter as standard equipment with the 15x 60 mm HB. The binocular as it is supposed to be sold with the tripod adapter is how Company Seven provides it. However, the gullibility of the often short sighted American consumer has never been underestimated by E-Tailers some who pull the item and then offer a Tripod Adapter as an option instead. Of course since most E-Tailers never look at what they sell they may simply be ignorant and not unethical.
Left: Tripod Adapter socket on the 7x 50 FMT-SX (similar to that on the HB) with protective cover removed (46,652 Bytes).
The front of the 15x 60 mm HB binocular Central Axis Bridge incorporates a ¼ inch - 20 tpi threaded socket which will accept a the provided Tripod Adapter as well as most other third party L bracket style adapters. This binoculars' tripod socket is provided protected by a thread on plastic cover. Using this accessory one may leave their binocular fastened onto a suitable tripod and head, set up conveniently by a window for astronomy or panoramic uses or for looking at a bird feeder, etc.
For nature watching or other surveillance uses the common camera tripod and head work just fine with the 15x 60 mm. But for astronomical uses, most camera tripods are not well suited and so for these sessions Company Seven recommends an articulated parallelogram stand such as our Universal Astronomics UniMount Light Deluxe. Such a stand, when installed onto a suitable field tripod provides a most comfortable observing experience. Stands such as the UniMount do this by allowing the user to position a counter balanced binocular high enough to provide more comfortable head positioning; one could even be reclined in a lawn chair while observing objects overhead.
Left: The carrying case provided with the 15x 60 HB (91,508 Bytes).
The Fujinon binoculars distributed by factory authorized retailers in the USA are provided with a slip on rubber eyepiece cover (sometime called a rain guard), slip on objective lens covers, two hinged straps (for rain guard and strap), padded binocular neck strap, carrying case, instruction booklet, and Fujinon Lifetime Warranty for the mechanical and optical components. For security, the Serial Number is engraved in fine print on metal in a location on the binocular that will not be too easy for the average bad guy to find and erase. And every Fujinon received at Company Seven undergoes a comprehensive testing and approval process, so whatever we deliver will be among the best example that the factory can produce!
15x 60 FMT-SX Binocular Specifications
Above Right: Fujinon 15x 60mm HB binocular with objective covers and rain guard on (95,862 Bytes).
† Twilight Factor (sometimes termed Relative Brightness) is a mathematical product of a formula. This formula however, does not factor differences of quality. For example two 7x 50 binoculars of vastly differing qualities will produce the same value by using this formula, and so this should only be used to compare binoculars of similar quality (i.e. a Fujinon 7x 50 FMT vs. Fujinon 10x 70 SMT-SX).
† Relative Brightness (or Relative Light Efficiency) pertains the the efficiency of the optical system in terms of throughput of light. This is measured by sensitive equipment and can help one to determine quality differences between models.
* Specifications are subject to change without notice.
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