Quote from: condor22 on February 22, 2021, 09:59:30 AM Yes i now understand your ignorance about HD binoculars and rifle scopes and your lame description of the best glass available. Do some research, google and knowledge are yor friends. 😉Ok so now you are just trolling me. I know enough about and have owned many that I don't need to ask any questions here about rifle scopes. So what is your issue?
Yes i now understand your ignorance about HD binoculars and rifle scopes and your lame description of the best glass available. Do some research, google and knowledge are yor friends. 😉
Can we just focus on the topic of binoculars?
For a few years now, I have been buying binoculars on occasion, because I happen to come across them in pawn shops or thrift stores. You can (at least in this area) still find some good binocs, usually made in Japan, for a great price, and in my experience, they are far better wrt clarity and focus, than the Chinese-made binocs I have had before. I highly recommend at least trying them out before automatically blowing them off. I have one pair that I would consider expensive- some Zeiss binocs that the hubs bought me years ago- but I have a few pairs of Japanese-made that I would far prefer over most of what I see available today, without spending lots of dollars.
Nitroger expands much less that air when heated. I doubt that your focus problems were due to Nitrogen. Softening grease maybe? -Y
Usa made with japan glass https://mavenbuilt.com/collections/binoculars...
Quote from: Yogi on February 23, 2021, 10:51:29 AMNitroger expands much less that air when heated. I doubt that your focus problems were due to Nitrogen. Softening grease maybe? -YThe heat definitely softens the grease, but when back at room temperature, everything feels fine, i.e. exactly like all my binoculars. But when warm, I can focus on an object, lift my finger off the focus knob, and watch it run backwards (or forwards, depending how you look at it) until everything runs out of focus room. To hold focus in such conditions requires some conscious effort. So, definitely driven by internal gas pressure and benefiting from lower viscosity of the warm grease. I wouldn't think of it as defective grease so much as an unfortunate combination of nitrogen pressure and pitch of the focusing screw. If the pitch were finer, i.e. more turns to focus, the problem would go away. Come to think of it, does anybody make a nitrogen purged zip-focus? Wow, that would be so sensitive to having any extra nitrogen. Naturally, they don't want it at sub-atmospheric pressure in there, but it doesn't have to be much, if any, over atmospheric either unless they are trying to compensate for slow leakage over its lifetime. I'll have to take a look and do some calculations. I might be able to estimate the pressure driving this motion. Maybe post a video to the back room too
just purchased a pair of newer manufactured open box Swarovski Habicht 7x42 for $769 on eBay. I just seen it listed and I think it was a good purchase for me.
Quote from: Rakin on February 25, 2021, 08:06:59 PMjust purchased a pair of newer manufactured open box Swarovski Habicht 7x42 for $769 on eBay. I just seen it listed and I think it was a good purchase for me.If there is nothing wrong with them, I think you have made a good to excellent choice. If they fit your hands well, enjoy forever. Did you get any kind of warranty - just out of curiosity?