How to choose a SLR camera

you get what you pay for, but it's not cheap, and good goods are not cheap.

cost performance is a relative concept. When buying a camera, the premise is performance and image quality, followed by price.

For those who want to take good photos, you can just use the mid-range SLR. Nikon d9 is the cheapest mid-range SLR.

it's better to add a lens to the camera, so you don't have to buy that small pullover.

No matter what, you must buy a fixed-focus lens. Most people buy a camera to shoot people, but a fixed-focus lens is essential for taking portraits. A fixed-focus lens with a few hundred dollars is fine, and it is good for taking portraits with a large aperture.

for non-professionals, it is good to have an 18-15 lens. Most scenes of home and travel can be handled. Add a fixed-focus lens to take a portrait, and basically you don't need to change the lens. This is very reliable.