“This is the guide I wish someone had written for me when I started 3 months ago. It’s much shorter than photography books that cover the same topics because it’s a computer geek’s guide. I skip right over the basics of using a camera because you can guess your way through the basics or even read your camera manual (wimp!).
I skip any advice about composition or artistic technique because there are better guides that cover those (though I might give it a shot next month). I use terms without defining them because I assume you can use Wikipedia if you need more detail.”
“Focal length is the most obvious way in which a lens affects a photo: it controls the angle of view, and hence how much of the scene is included in your photo. The reason that it is measured in focal length rather than degrees, is that the angle of view yielded by a certain focal length depends on the size of the camera’s image sensor.”
