Hacker News new | comments | show | ask | jobs | submit login

One of the major difference is lens coating. Uncoated glass reflects roughly 7% of light per element. On a simple normal-length prime like this it may not be a huge issue, but you would see a major difference with a longer focal length consisting more elements.

Visually, coated lenses yield more contrast. In the case of more modern (usually after the 70's) multi-coated lenses, there is also a UV-reducing layer that maintains more detail at a distances due to minimized haziness.

Some of my favorite examples of a classic, uncoated lens showing its effect are from the Lewis Hines photos of the Empire State Building construction.

http://en.wikipedia.org/wiki/File:Old_timer_structural_worke...

There is some obvious dodging and burning done to this print in particular (the worker has been darkened compared with the cityscape in the background) but notice how much the detail fades with distance.




Guidelines | FAQ | Support | API | Security | Lists | Bookmarklet | DMCA | Apply to YC | Contact

Search: