Walter_Graff
Carbonite Member
"All of that makes sense, except THE35mm adapter is merely a ground glass viewfinder at heart. How re-imaging a viewfinder screen to video would result in higher resolution in somewhat beyond me."
I look at it more like a periscope than a viewfinder sending the light through a few mirrors and a piece of glass. Yes glass is our friend and our enemy. Glass can focus and glass can blur. Did you know the average broadcast lens has some 18 individual pieces of glass in it? Thats a lot of glass. So the idea is to make sure the glass and the coatings on it do their best to make as good a picture as possible. Of course you also get what you pay for so don't expect the same lens quality on a $3000 camera as you can in an individual $20,000 lens.
I think we have to turn off logic for a second. See as much as we use numbers and the like to represent resolution and all the other stuff, our mind is in interpreter. Sharpness is a psycho-visual sensation in our mind and as such beyond the numbers that some like to use to represent definition, there is so much more. Take HD for example. If I took a standard definition set playing footage and placed it three picture heights from me, then took an HD set playing the same footage in HD and placed it three picture heights from me I could not tell which was the HD and which the SD. Part of the reason is that our mind sees contrast over definition let alone that our eyes can only see only so much sharpness. So lens manufactures often concentrate on lenses reproducing contrast correctly as that is what we see much more than what we call resolution. Then of course the other problem is our brain itself. Depending on where you are standing, what the light is like where you are and what color you are looking at your brain can create quite an illusion. But then again isn't film nothing more than an illusion of still pictures? An interesting read:
http://persci.mit.edu/people/adelson/publications/gazzan.dir/gazzan.htm
and two articles on the perception of resolution from my website (if you have not already seen them)
http://www.bluesky-web.com/high-and-why.html
http://www.bluesky-web.com/numbers-mean-little.htm
I look at it more like a periscope than a viewfinder sending the light through a few mirrors and a piece of glass. Yes glass is our friend and our enemy. Glass can focus and glass can blur. Did you know the average broadcast lens has some 18 individual pieces of glass in it? Thats a lot of glass. So the idea is to make sure the glass and the coatings on it do their best to make as good a picture as possible. Of course you also get what you pay for so don't expect the same lens quality on a $3000 camera as you can in an individual $20,000 lens.
I think we have to turn off logic for a second. See as much as we use numbers and the like to represent resolution and all the other stuff, our mind is in interpreter. Sharpness is a psycho-visual sensation in our mind and as such beyond the numbers that some like to use to represent definition, there is so much more. Take HD for example. If I took a standard definition set playing footage and placed it three picture heights from me, then took an HD set playing the same footage in HD and placed it three picture heights from me I could not tell which was the HD and which the SD. Part of the reason is that our mind sees contrast over definition let alone that our eyes can only see only so much sharpness. So lens manufactures often concentrate on lenses reproducing contrast correctly as that is what we see much more than what we call resolution. Then of course the other problem is our brain itself. Depending on where you are standing, what the light is like where you are and what color you are looking at your brain can create quite an illusion. But then again isn't film nothing more than an illusion of still pictures? An interesting read:
http://persci.mit.edu/people/adelson/publications/gazzan.dir/gazzan.htm
and two articles on the perception of resolution from my website (if you have not already seen them)
http://www.bluesky-web.com/high-and-why.html
http://www.bluesky-web.com/numbers-mean-little.htm