BirdForum is the net's largest birding community dedicated to wild birds and birding, and is absolutely FREE!

Register for an account to take part in lively discussions in the forum, post your pictures in the gallery and more.

Reply to thread

Message: <blockquote data-quote="OPTIC_NUT" data-source="post: 3244505" data-attributes="member: 121951">No,  not alone.There are many premium and other binoculars with a bad blackout issuethese days, mainly for someone short-sighted with glasses off.   For somemodels,  I use a few E6000 adhesive dots to clap a coated plano-concave~ -200 or -250mm lens over.  You try it curve-front and cuve-back, and oneway defeats the blackouts even more, puts off the advent of spherical aberration.  All this assumes you have weak or no astigmatism.Most people with prescriptions who are older have a decentamount of astigmatism, so they always have to wear glassesfor a sharp field.   Almost  all the old models are far more generous  with you.Of special note:  Bushnell Customs, any Featherweights (cups off), Custom Compacts, Swift Tritons and Neptunes.   J-B4s  (ones made at Toei Kogaku) are perfect that way and never black out.  It costs a little fuzz at the field edge.In modern times, it's hit-or-miss, but 7x50s are extremely generous. Fujinon FMTR-SX is super.Meopta acknowledges this eye-torture-for-top-field with eyecups that extend a lot.  That works.Some people here have extended their eyecups, I believe with bicycle innertube sections.</blockquote>