Want to get into photography and thinking of which lens to purchase? Here’s an easy visual to help you get started.
Beginner's photography tutorial with a comparison chart of aperture values.
Twin lens reflex camera comparisons Minolti Autocord, Rolleiflex 2.8F and Rolleiflex 3.5 T Type1
Photography Cheat Sheet: what your camera captures at every lens' focal length
ISO comparisons, all shot at f/5.6 aperture & 1/200 shutter speed
Canon & Nikon shooting modes explained
Here is a side by side lens price comparison for Nikon & Canon. If you are doing some price shopping, this can help.
The B&H Guide to Exposure: Understanding Shutter Speed.
nikon and canon lens price comparison
My 6 Favorite Inexpensive Canon Lenses More