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="henry link" data-source="post: 3152593" data-attributes="member: 6806">The poor performer illustrated in the link in post #1 IS a back to the future design at least 40 years old. It's a 25 year old Swarovski 8x30 Habicht Porro equipped with a flat black grooved baffling cone extending from just in front of the prism shelf to just behind the objective cell and a flat black grooved retaining ring in front of the objective. Look into it from the front and you see what appears to be a beautifully baffled interior. Even looking from the back you don't notice any problem with interior reflections unless strong off-axis light happens to catch the edge of the objective cell at just the right angle. Then the impressive looking baffle cone becomes useless because it's a little too large at the front to completely block the objective cell reflection and no hood of reasonable length in front could prevent the bright spot from forming on the opposite side of the objective cell from a close sun angle. I've learned that nice looking interior baffling in old Porros often fails to completely block reflections from the objective cell and that's where most veiling glare in those binoculars originates.</blockquote>