3 ms·
But for actual use, especially screens and reading, the tradeoff can be pretty bad
by MarceliusK 4mo ago
But for actual use, especially screens and reading, the tradeoff can be pretty bad
- walterbell 4mo agoSearch for "Chemistrie" magnetic lens attachment in +0.5 increments. They can even stack for different focal lengths, e.g. reading vs computer screen at 36". Magnets embed in primary glasses. Expensive via local opticians, they will retrofit via mail order and buychemistrie dot com.