SuperflyTNT wrote:
I own several cameras. There are several lenses designed for those cameras. They come in a multitude of focal lengths. Each of those lenses will give me different coverage based on those focal lengths. It’s pretty useful to me to know that I can buy a 35mm lens for my Nikon D500 that will give me similar coverage to a 50mm lens on a full frame, and that I can buy a 25mm lens to give me similar coverage with my Lumix G9. Is that really hard to understand?
Not for those of us that understand and want to use it. But the average person and the beginner won't use the crop factor, they'll either walk closer backup or zoom in or out to get the composure they want and shoot. But the way you're talkin is "can I use this lens on that camera and if so what will be the effect", and in that case yes you need it.
Happy shooting.