Originally Posted by 2240
Do you wear glasses? Some binoculars are more suited for glass wearers than others.
That's a really good point!
is a function of eyepiece design, and unless posted by the OEM, not something you can calculate, like exit pupil
, which in this case would be 4.2 mm and 5.0 mm respectively.
Other things to consider, in addition to the weather proofing and eye relief that 2240 mentioned, are diopter design, ease of focus, internal light baffling, lens coatings, etc.
For Cleaning Optics…
Do not use paper towel on coated optics--you'll scratch the coatings. Scratches cause lens flares, which are very noticeable in low light.
Here's How I Clean Exterior Surface Optics:
- Wash and dry your hands!
- Blast lens with canned air to remove grit, etc.
- Use a soft brush and canned air on stubborn grit.
- Use lens tissue, real cotton balls, nose tissue or soft toilet paper wetted with either solutions noted below.
- Gently clean with multicoated lens cleaner or a weak solution of ivory soap and warm water.
- Change tissues or cotton balls several times.
- Gently remove any soap residue with fresh tissue/cotton wetted with warm, distilled water (not necessary when using lens cleaner).
- Blast dry with canned air.
- If need be, polish with fresh dry tissue, cotton, or micro-fiber lens polishing cloth (reserved only
for that purpose).
- Resist the urge to over-clean optics. A scratched lens is scratched forever!
Yes, bath and nose tissues leave lint, but they don't scratch! The lint is easily blasted away with canned air.
Be careful not to shake or tip canned air--the propellant may damage coatings. Rather hold the can erect and move the piece being cleaned around. I always spot spray my wrist before shooting a piece. Get canned air on sale at Office Max or buy it at Sam's Club.
The above-method is safe and works well on all exterior surface optics
, like binoculars, rifle scopes, telescope objectives and eyepieces, cameras, DVDs and CDs, fine eyeglasses and sunglasses, and fiber optics.