Full frame vs. crop factor.
Q: IS IT BETTER TO HAVE A FULL FRAME CAMERA BODY WITH FEWER MEGAPIXELS OR A CROP FACTOR CAMERA BODY THAT HAS MORE MEGAPIXELS?
A: I have seen a lot of questions like this one. Crop or full frame? What does “equivalent” focal length mean? Which is better? Is a 12 MP full frame better than an 18 MP crop sensor? And so on and so forth.
Get a full frame camera. Take the sensor out and put a smaller one in there. Same camera. Same lens. Now just a smaller sensor. Light comes through the lens and covers the full frame sensor area. Now that you have put a smaller sensor in this camera (and no, you can’t actually do this), you now see less of the image being projected by the lens.
Or, look at your computer monitor. Put strips ...