>>3694725>Why is it trash? I am guessing vintage lens don't work with the features of newer cameras?Short story long:
Cameras used to come with fast prime lenses like 50mm f/1.8 as their "kit" lens, because back in the day, film was slow and people needed every photon they could get and optical technology hadn't gotten good enough to make non-shit zoom lenses yet.
Eventually, though, they learned how to make ISO 400 and ISO 800 film and zoom lenses got less shitty and most people buying cameras wanted to get them with a cheap zoom lens. The problem now was that cheap zoom lenses have small apertures which don't let in a heck of a lot of light, and that gives you a very dim viewfinder relative to something like even an f/2.8 prime.
So the solution that manufacturers came up with was that they stopped using actual ground glass viewfinders when they switched to autofocus cameras. Instead, viewfinders nowadays are arrays of tiny microlenses themselves, which let a lot more light through.
The downside is: modern microlens-based viewfinders won't actually show you depth of field narrower than about f/2.5. If you have a fast lens and a camera with DoF preview, you'll see that if you open it up wider than f/2.5, the viewfinder straight up doesn't look any different. The actual photo that you'll take still has the shallower depth of field, but you'll never see it in the viewfinder, which means nailing focus using the optical viewfinder is nigh impossible. This is doubly true because those viewfinders almost never have focusing aids like split-prisms like older manual focus camera viewfinders did.
Now, all that being said, that guy's a fucking moron because your exif says you're shooting with an A7 Mark II, a mirrorless camera with an EVF, which means you can turn on focus peaking and magnification and the viewfinder shows you the exact scene projected onto your sensor by definition. It works great with adapted vintage glass.
