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Shutterbug Strasse A photographer's haven for the lastest in digital or traditional film cameras. |
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Shutterbug Strasse A photographer's haven for the lastest in digital or traditional film cameras. |
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In Reply to: Re: It all depends on the camera... posted by Romy on October 8, 2001 at 07:10:02:
CCD's have taken over in spectroscopy, and are used as photon counters chilled to at least liquid nitrogen temperature. The trick being that as photon counters the noise can be ignored, since it's pulse counting. It seems (it's reported, I haven't my own hands on one) that there is better capture effiency with CCD's, perhaps layer-tuned or the like, I dunno.But for handheld things, I think you can see the problems.
I'm not sure at what speed the crossover between CCD's and film happens at, but it will undoubtedly go in the CCD's favor as better devices are made, with less surface defects, etc.
There isn't a whole lot of film usage left in MOST kinds of astronomy (imaging being the one that still to some extent uses it) any more, because CCD's and other detectors work better for most of the specialized applications.
BUT, I think that for the time being, we'll see better long-term results from film, simply because the CCD's in most photographic camera applications aren't running in photon-counting mode, and there will still be a constant noise growth with time that you don't get with film.
JJ
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Follow Ups
- handheld cameras don't seem to do it. - jj 12:20:59 10/08/01 (1)
- Thanks (nt) - Romy 21:20:02 10/08/01 (0)
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