https://www.youtube.com/watch?v=T4ZvAFCt5Sk>but why would I want an old ass camera?To begin with, the body is secondary to a lens. A cheap lens on a modern pro body will still perform poorly. So the main reason is really to have a body with which to grow your lenses. Lenses are reusable from generation to generation and do not lose value, maintaining price depending on the condition.
>Why a DSLR?It's really more about control. If there is a compact/bridge that allows full manual control (focus, aperature, shutter speed) then it should suffice. Mirrorless also have interchangeable lenses as well as adapters for really old lens systems that are no longer in use, which you can then pick up lenses for cheaper. You want full control on the focus so you can do tricks like focus stacking as well as spending less time fighting the AF system. Additionally, having an interchangeable lens system enables you to also play with macro photography.
>There are some downsidesIn the video they mention most of it. Basically it is older tech so the controls may be antiquated, the color depth is not as good (reds are always problematic) and the resolution is not as high so cropping is not really a good option.
>By brandBecause the lenses are the most expensive part when you buy $100 bodies
>NikonF-mount has been in use since almost the beginning the only real difference is recent DX lenses is for the cheap DSLRs you see in costco and cannot be used on FX bodies. FX lenses can be used on anything, also all old lenses from when film was king are FX lenses.
>CanonI'm not too familiar with. Their lens mount has changed a few times so there is not as wide a range in old lenses available as nikon. the red ring lenses are always really expensive because the 'L' stands for luxury.
>Sonytwo types the mirrorless(e/ef mount) and the alpha(a-mount). Mirrorless cameras can use any lens with the right adapter, adapter does not always allow for autofocus and autometering.