Binoculars

Often the best place to locate a staff gage is not the easiest place for the hydrologist to read it. It is usually across the river or on the farthest bridge pier it seems. Binoculars are a necessity in this situation for accurate staff gage readings. Several models are listed below which feature different optic ranges as well as quality. Some are waterproof and some are rubber covered for rough field handling. Also often during flood events or during the short days of winter, it is necessary to take readings during low light or dark conditions when night vision binoculars are needed.

Brunton Binoculars

Binoculars are often needed for reading staff gages for accurate stage measurement readings. Often readings occur during heavy rainfall to take measurements during flood measurements. We have chosen to offer Brunton Binoculars because of the following features:

Waterproof/fog proof design
Rubber armor coating
Bino-glove™ case allows use while still in case
Eyeglass compatibility
Phase coating allows a sharp high contrast image no matter what time of day or light conditions
Extreme close focus™ and extra wide field of view
Fully multi-coated lenses
Opti-visor™ lens protectors

To select the best binocular for your application there are several factors to consider:

Power:  Binoculars are described by 7 x 42, 8 x 25, 10 x 42, etc. The 7X, 8X and 10X identifies the magnification or power. A 7X makes the object look 7 times larger and nearer than viewing without binoculars. The higher the power the field of view becomes smaller as well as brightness and clarity. Also, the higher power makes it harder to "steady" the image.

Aperture: The second number X42, X25, etc. is the diameter of aperture of the objective or front lens in millimeters. Aperture size determines the amount of light and detail or clarity of the object. The larger aperture allows better low light viewing.

Exit Pupil: The exit pupil is the objective lens diameter divided by the power, for example A7 X 42 binocular has a 6 mm exit pupil (42mm divided by 7X = 6mm). The brighter the light conditions the lower the exit pupil needed and vice versa. So a 6 mm exit pupil works well under dark, dawn and dusk conditions.

Field of View: This is the widest dimension of the circular viewing areas seen through the binocular expressed in feet at 1000 yards distance. Field of view decreases with increase in power.

 

Solid performance at an affordable price. These binoculars from the Lite-Tech series are designed to deliver excellent quality and performance.

They are designed for bad weather - all are nitrogen filled for waterproofing. They feature BAK-4 prisms for less distortion, coated optics for better contrast, and they are quipped with durable rubber armor for rugged use.

Lite-Tech Binoculars are available in two types: compact and standard roof prism. Each type is available in two magnifications: compact in 8 x 25 and 10 x 25, roof prism in 8 x 32 and 10 x 42.

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5 x 10 Penscope - Model 4061

This is a great lightweight penscope to throw in your field vest pocket when you really want to pack light. This Brunton penscope has all these great features:

4.125" x .625" x .625"/1.75 oz.
5 power magnification
10 mm objective diameter
2 mm exit pupil
280 ft. field of view @ 1000 yds.

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The Eterna binoculars are top-of-the-line binoculars with multi-coated optics. The Emerald Fire™ coating on the lens is a technologically advanced multi-coating designed to eliminate both UV rays and infrared light, thus increasing clarity by reducing the amount of reflected light. Eterna binoculars have a large field of view, BAK-4 glass prisms for less distortion, long eye relief for comfortable viewing, and a large exit pupil for excellent brightness.

Dust covers on the front and rear protect lenses from dirt and scratches. The front covers also act as blinders to help block out the sun. The body is coated in rubber armor for extra durability. Nitrogen filled for waterproofing, the binoculars may be used in bad weather. Includes neoprene case, neoprene adjustable strap, and lens brush.

 

Item No.	DESCRIPTION	WEIGHT
203-025	Eterna Full Size 8 x 45	3.5 lbs.
203-026	Eterna Full Size 10 x 32	3.5 lbs.
203-027	Eterna Full Size 11 x 45	3.5 lbs.
203-028	Eterna Compact 8 x 25	0.8 lb.

 

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Residual Oil Remover Lens Cleaner

Safely clean oil residue from the optical, glass and plastic surfaces of binoculars, cameras, survey instruments, compasses, and clinometers with this lens cleaner. The remover works by emulsifying the oil residue both on the surface and in the pores, enabling its removal, as well as the removal of any other surface residues. It also inhibits dirt and dust accumulation. Spray on any ordinary, non-treated tissue, wipe surface and remove with clean tissue.

 

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