3 ms·
That birefringence in corundum is why fluorite is used. Fluorite lenses low index of refraction across all wavelengths is also the reason for lacking chromatic
by lightedman 1mo ago
That birefringence in corundum is why fluorite is used. Fluorite lenses low index of refraction across all wavelengths is also the reason for lacking chromatic aberration.
Fluorite lenses are generally superior. For macro photography there is literally no equivalent.
- amluto 1mo agoYou are welcome to wear a macro lens cantilevered out from the bayonet mount built into your face :) I would prefer a lightweight, or at least not outrageously thick and heavy, pair of glasses.