Quote:
Originally Posted by The Mekon
Syousef,
IF stands for individual focusing as opposed to CF centre focusing. Each eyepiece has its own dioptre adjust, with no focus wheel. Its the only way to go for proper "marine" binoculars that are fully waterproof. Coming from this background, I have found that this type is also the best for astronomy, having viewed the dark skies at sea for many years.
Your slide show is very well done and should be informative and enjoyable. Congratulations!
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Thank you...and that's interesting. I'm seeing references on the web to "internal" focusing too. I wonder if those references are just plain incorrect or if both are valid. (Having a background in computing I'm use to an abundance of confusing acronyms).
That information about viewing at sea isn't something I want to dismiss. It's gold. But I have to think how to incorporate into the talk (which is suppose to be addressing suburban skies). This stuff is way outside of my own experience too.
Is your experience in the Navy? Or commercial?
I think this is what I'll do:
–Don’t fog up internally (Nitrogen filled, waterproof)
•Internal focusing mechanism
•Some have individual focusing, not central