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Modifications Available


The Reliability of our High-Powered Observation Binoculars

Collimation : Resolution Tests : Waterproof/Water Resistance : Tripod Inspection


The most important thing to look out for when purchasing a binocular is correct collimation. This is where both prisms are positioned in the same direction, thus transmitting light along the same path. If the prisms are not aligned, eye strain or double vision is inevitable.

All our high-powered observation binoculars are checked on arrival in our workshop for any defects. Prisms will be checked for accurate alignment; interchangeable eyepieces will be checked for precise and smooth fitment. Each eyepiece will be marked for precision viewing.

When first received from the factory, there are higher odds of the interchangeable eyepiece model being found out of alignment. This is due to the additional moving parts of the interchangeable lenses. It is therefore particularly important to maintain our high level of quality assurance.

There are very few companies in the UK that have the facilities for repairing binoculars so be wary if the supplier does not have a binocular collimator. Many binoculars shipped from the Far East will be out of alignment on arrival to the UK, either because of poor quality assembly or knocks in shipment.

Resolution Tests

Each binocular is checked for resolution performance on a resolution chart. This assures our binoculars have no distortion and that the optical clarity achieved is maintained to the highest level.

Waterproof / Water Resistant?

The factory waterproofed Leviathan has all moving parts greased to reduce the infiltration of moisture. This is not acceptable when intending to use the Leviathan outdoors.

The waterproofing procedure used at Monk Optics assures many years of use in all but the most extreme environments: The binocular is stripped and re-machined to take o-rings. It is particularly important that moving parts such as the IPD and the eyepieces are sealed as these are more open to the elements. Desiccants are added to eliminate any moisture remaining in the binocular once it is sealed. This also stops condensation that might be brought on in cold/damp environments such as in early morning.

All joints are sealed with silicone and a glass plate is fixed over the objective lenses, thus stopping any water from entering the binocular housing. The final stage of the procedure involves adding dry nitrogen. The dry atmosphere inside the binocular inhibits the growth of mould.

Tripod Inspection

Time is taken to check for smooth operation with ever one of our wooden tripods. They are rubbed-down and polished for a smooth, clean finish.

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