The standard 1% inch filter size can often be pushed in to the rubber eye cups
on binoculars, although care will be needed to ensure that you don't scratch or otherwise damage the filter surface by holding it too close to your eyes (it is also only too easy for the filter to pop out and land in a patch of wet grass or on a hard concrete floor, so great care is essential).
We would have liked to have seen a little more resistance on the adjustable eye cups
and better objective lens caps, but all in all, they are a heck of a buy.
Here's what Burris packs into each and every Signature Series binocular: multi-coaled lenses for reflection elimination and maximum light transmission, a long eye-relief that doesn't sacrifice field of view, a large exit pupil for use in low-light conditions or extended periods of viewing, O-ring sealing locks to keep out moisture, tough rubber armor coating for long lasting durability, retractable eye cups
and focus lock.
Answer on page 88 Jargon-buster Blinkers A form of headgear that consists of a hood with eye cups
that are fitted over a horse's head to limit the horse's vision and reduce distractions, with the aim of concentrating the mind on racing.
Both feature multi-coated, BaK4 prisms, long eye relief for viewing comfort and twist-lock eye cups
. They are fully O-ring sealed and nitrogen filled, so they remain waterproof and fogproof no matter the conditions.
The Nighthunter's contoured rubber eye cups
further enhance internal light transmission by eliminating sidelight.
Venturer LX binoculars have extra-long eye relief to accommodate most eyewear and user friendly twist-out rubber eye cups
for hunters without glasses.