[brucedawson]

Unfortunate typo: the article says "Having placed the fresnel lens, we're not able to get an usable image on the whole 40x30cm sensor." but I think the "not" should be "now". Having "not" reverse the meaning of the critical sentence!

[pixelpoet]

They also keep saying definitively instead of definitely :)

[niccolove]

Sorry, I promise I'll spend more time spell checking my articles from now on.

[pixelpoet]

It's no problem really, and thanks for the great article! I'm actually simulating lenses at work right now so this is topical and very interesting.

Spellcheck wouldn't help here because definitively is also a word, just not the "write" one :)