Interesting article on camera lenses

[DannyF1966]

Hi,

I just came across this article and thought I'd share it - it's aimed pretty much at the beginner, but there's a cool youtube video embedded in the article which explains how camera lenses are made.

http://i.gizmodo.com/5160891/giz-exp...tunning-photos

Cheers,

Dan

[daft_biker]

That's pretty good

The only thing the pedant in me picks up on is that is a zoom lens is one that allows you to change focal length without changing the focus distance. There are lenses like the Sigma 120-300mm f/2.8 that allow you to change focal length but it changes the focus distance as you do...technically it's not a zoom lens...I think they're called varifocal lenses or something(not as complicated to make as a zoom apparently). Also, when focussing a prime lens you are also changing the focal length...focal length is usually measured with lenses set to infinity focus.

Minor detail but am sure the geeks amongst us like knowing this stuff

[moebius]

Thanks for posting this link. Very informative and interesting.

Cheers! — Möe

[photonoobie]

Great vid on that page. Never knew how complex the lens manufacturing process was...

[tobin999]

that's pretty informative i leaned some new things