Photography has advanced considerably from its conception into the digital age. Along with such advancements come additional complications - different sensor types, a variety of sensor sizes, formats and files! So what does it all mean, and why does it even matter?
Read what Mike Lowe has to say.
The article covers some background on photography, image circles, optics, crop factor, sensor sizes, CCD and CMOS. A very informative article to read.

The current market has cameras with a wide array of sensor sizes and types