At 20 hours? I used to do that regularly. Wake up at 6 am, work, party til 2 am on a Friday. I've never heard of anyone hallucinating in that short of a time. That only happens when you're up for like 3 days straight.
If you just buy a bare sensor, yes, it's going to be +/-5. They also have a non-linear response which needs to be dealt with as well.
If you are only concerned about a 20 or so degree temperature range it's not an issue, but if you are trying to read over a 100 degree range, you'll want to account for non-linearity as well.
Also, accurate and precise to 10ths of a degree isn't really attainable unless you do fancy math as the sensor will heat each time you read it. The idea is to take multiple readings and average them but unless you are accounting for the heating of the sensor, your numbers will be garbage.
This is for consumer grade sub $50 sensors. Of course you can go fancier but you have to pay for it.
This is incorrect. A solar flare is not like an EMP. It's low frequency so only wires that are miles long would be energized. It could possibly destroy electronics that aren't protected by a power strip. But no, it's not going to destroy your cellphone or the electronics in your car.
I work in the optical industry. I do R&D/quality control for a lens manufacturer and agree Luxottica is an awful company, but your comment is way off base. It's actually quite wrong.
Your "zyl" acetate frames aren't higher quality. Modern acetate is stronger, lighter, less brittle, less subject to warping from temperature change, and more resistant to UV damage which impacts brittleness and color. 40 years of material science progress. No one in the industry would say older acetate is better. It's worse in every way especially because yours are old. They're breaking down.
People don't wear glass lenses anymore for a reason. They are heavy and the only advantage over plastic is less chromatic aberration which is a non issue unless you are comparing to an extreme prescription using high-index plastic. They are also fairly dangerous compared to plastic due to the way they shatter. They fog up more easily. Again, 40 years of material science.
Additionally, there are no low optical-quality plastic lens blanks. This is a solved problem. The only defects you'll get in lens blanks are bubbles and these won't make it through production. What happens after a manufacturer grinds the lens out is a different story but I can also tell you that their lens surfacing is not low quality by any means.
Your hinges aren't any better and get loose over time. You can't actually use these for 40 years, they will wear out too and are harder to replace. Spring loaded hinges are lighter and reduce strain on both the frames and the wearer. I know what they use, they aren't cheap, and are high quality.
I do agree with your point on the branding.
The optimization for optics is all about weight. Your old frames and lenses aren't better because they're heavier, they're worse. As well as being more brittle and shatterable. It's like pining for the old heavy golf clubs made of wood and iron or all steel cars with V8 engines. Yeah, they're heavier! But they're worse in every way.
I will also say that you should buy frames because you like the frames. If you want great lenses, you just get them made. You shouldn't expect high-quality prescription lenses from a frame manufacturer, that's what your optometrist is for. I buy cheap frames all the time and pop in whatever I want.
You may have a bit of a point if you are talking moderate to high prescription ordered from Ray-Ban, but if you are talking about their non-prescriptive sunglasses, you're just yelling about all the wrong things.
Edit: typo and swapped in "surfacing" rather than "production" for clarity.