Nikon Monarch Binocular – Provide Great Eye Relief Protection

If you are an astronomer or an amateur, your binoculars must have good magnification power and a big objective 
lens. It is a good idea to compare the prices and the features of different binoculars. You may consider buying a 
cheaper set if the features are comparable, however, if the features do not completely match your needs it would be 
unwise to base your decision on only the price of the binocular set.
These features of a binocular can range from a very close distance of 5mm outward to as much as 23mm. Eyeglass 
wearers should consider those binoculars with a rating in the 14mm to 23mm range. The separation between short and 
long relief tends to be between 14mm and 16mm.
These designations can differ from one manufacturer to another. What may be classified as 14mm by one may be 15mm 
to another. And some manufacturers also record ratings as low as 13mm to be long eye relief.
The first purpose of the binoculars eyecups is to provide shade or cover from sunlight, either direct or indirect, 
between the eye and the binoculars eyepiece. Providing shade or cover between the eye and the binoculars eyepiece 
greatly enhances the clarity and sharpness of the object being viewed through the binoculars by reducing glare onto 
the focal lens of the binoculars and the eye. Binocular eyecups should always be in the normal position when 
viewing through your binoculars if you are not wearing glasses. 
If you are wearing glasses for corrective vision or sunglasses and do not want to remove them before viewing 
through your binoculars, fold or twist the binoculars eyecups down before viewing. This will bring the binoculars 
closer to your eyes while providing the approximate eye to lens stand-off of the binoculars. When the binoculars 
eyecups are in the down position for glasses use, the binocular eyecups provide very little cover from outside 
light sources.
If you wear glasses it is recommended that you remove your glasses when viewing through your binoculars if your 
vision is such that you can focus clearly without them. For most people that wear glasses this is no problem, but 
for some, especially those with astigmatisms, this is not always the best situation for clear, sharp binocular 
viewing. Viewing through your binoculars without your glasses when you can still focus clearly will offer you the 
best viewing through your binoculars as far as eye relief, stand-off and light glare are concerned.