Depth og field

I have found this webiste, where you can get a very good understanding af depth of field in an interactively way. On this site you can calculates the camera depth of field and background blur and visually simulates it on a photo together with different types of lens blur (bokeh) for any lens, camera and distance combination.

http://dofsimulator.net/

Fysik og kemi

Det sker en gang imellem at man skal bruge noget som normalt kun findes i fysik og kemi lokalet. Her kan det købes som privatperson http://www.frederiksen.eu/