And if it is possible to correct your vision with the camera lens, can the picture then be printed with the same clarity for the poor vision haver?
You can adjust the dioptres of the viewfinder with a little scrollwheel next to it, to match your personal eyesight. Farsighted people will then be able to look through the viewfinder without wearing their glasses or contact lenses and see a sharp image. They will see the same sharp image as a person with perfect vision would see looking through it with the dioptre setting at 0. Then the photographer can use the manual focus to take a picture that looks sharp to them (with adjusted dioptre-setting) and it will also be a sharp photo ‘to the camera’.
Disclaimer: I’m not an optician. I do, however, work in advertising and happen to have a number of clients in the lens manufacturing industry. Take what I’m about to say with a grain of salt.
Short answer is, not really.
Diagnosing vision issues is much more complicated than simply “is it in focus”. The shape of the cornea, how your eye physically reacts to light, distance from an object, and disease all have an impact on how you perceive the world around you. That’s why you have things like aberrations, glares, near sightedness, far sightedness, and a plurality of other vision problems. When someone is fitted for glasses or contact lenses, a number of parameters (read, dozens) are required get what is considered a proper “fit”.
There are some similarities between how a camera lens works and our eyes, but you also have to consider that you’re not just looking through the lens itself, you’re focusing on a screen that’s attached to the lens. So, if you can’t focus your eye sight at the distance the screen is at, it doesn’t matter what the camera is seeing, because it’ll look like garbage to you either way.
I think they might be referring to a camera with a direct, through lense, viewfinder. Like a pair of binoculars.
I thought the same maybe, but I assumed an actual camera because of context (using the camera’s manual focus and printing out the photo afterwards). @WeirdGoesPro@lemmy.world ? Did I misunderstand?
DSLR’s have optical focus adjustment knob right next to viewfinder, at least on Canon DSLR’s. You have to calibrate it first, though.
I’ve wondered about this. Sometimes I use my phone to find my glasses, I can hold it close to my short-sighted eyes and see things clearly that are far away.
Binocu-spectacles would be pretty cool, we already have the technology to make a digital display with a voice-activated stepped zoom control…
