High Resolution film

greenspun.com : LUSENET : B&W Photo - Film & Processing : One Thread

A film of only 720 lpmm has shocked a few people. Theyu thnk it is "not possible" " vaporware " etc. High resolution film is quite commonon: there are a few: Agfa 10e75-8 3000lpmm. Agfa 8E75-HD4 5000 LPMM kODAK 659-F 6000 lpmm. A few other Kodak film s in 1000 lpmm range. For some one whoe never seen a camel,would think what a strange hourse with humps.

-- martin tai (martin.tai@capcanada.com), October 18, 2000


What speeds and spectral sensitivity do these films have? The answer to that shows why they're not used for general photography.

Don't get me wrong; I'll be one of the first in line for the new film when it becomes available in some way in which it's actually possible to buy it. If there aren't any serious drawbacks it'll be wonderful stuff.

I think what's been confusing is that it's implied that such high resolution can be easily achieved by using an ordinary camera and lens. That lenses can achieve stunningly high resolution in the projected image isn't (or shouldn't be) in question; some published tests of Zeiss Hasselblad lenses showed maximum numbers of 400+ lp/mm, and an engineer at Perkin-Elmer tested his own 100 f2 Kinoptik lens out to the limit of the test equipment, 600 lp/mm (personal conversation).

But in no case that I've ever heard of has the camera _system_ maintained such high figures, limiting that of course to systems that are available to the public. What's in the bay of a TR-1 doesn't count.

So...we're really limited to how perfect the camera system is...and that's really not very good.

What I see as being revolutionary and exciting about the new film is that the RP of the film itself may no longer be of any real significance; the limits will be system quality and technique.

-- John Hicks (jbh@magicnet.net), October 19, 2000.

Consider midrange light at 500nm. At 1000 lpmm the line pairs are the same size as the light wavelength. So those films you list were tested with UV light. 720 lpmm is only possible with light of wavelength 694 nm or shorter. Even if the film and lens could resolve half that the wave nature of light would give a different "look" of sharpness than a larger image with less absolute resolution.

-- tim brown (brownt@flash.net), October 20, 2000.

There are some discussions about gigabitfilm in rec.photo.film+labs http://x56.deja.com/getdoc.xp? AN=704393748&CONTEXT=977153255.1081606148&hitnum=1

-- martin tai (martin.tai@capcanada.com), December 18, 2000.

Apparently gigabitfilm is now available in some germany photo shops a 35mm 36 exp roll is selling at about 17DM

following is some more discussion about this film: http://x57.deja.com/getdoc.xp? AN=704523279.1&CONTEXT=977153761.1638400021&hitnum=2

-- martin tai (martin.tai@capcanada.com), December 18, 2000.

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