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#51
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Iv'e done the same. But now reduce the resolution until you can't see the grain any more. What size image do you have? The same applies to any digital image This is a question with a hundred answers. .... and comes in a thousand flavors also ;-) -- dimitris |
#52
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Iv'e done the same. But now reduce the resolution until you can't see the grain any more. What size image do you have? The same applies to any digital image This is a question with a hundred answers. .... and comes in a thousand flavors also ;-) -- dimitris |
#53
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"Owamanga" wrote: "Dps" servis*REMOVE wrote: I scan 35mm at 40+ Mp. But I think the equivalent in terms of ISO100 grain is 20Mp, I am not sure though... Iv'e done the same. But now reduce the resolution until you can't see the grain any more. What size image do you have? Rather than reducing the resolution, you should hit the scan with NeatImage or Noise Ninja. Then you can compare the detail to what you see in digital capture by either downsampling the film or upsampling the digital. To my eye, high-res scans are _much_ softer (i.e. less rich in detail) than digital originals on a per-pixel basis*. But scans have a lot of pixels. I don't see significant loss of pictorial detail when I downsample 4000 dpi scans to 2400 dpi or so, so that puts 24x36 as very close to 8MP. (Note that this is pretty much the same as saying that film has very little useful information above 30 lp/mm, and none above 45 lp/mmg.) *: Check here for a lot of examples of what real scans actually look like http://www.terrapinphoto.com/jmdavis/ This is a question with a hundred answers. Well, there's already a fairly reasonable consensus** that 6MP is about 80% of 4000 dpi scanned Provia 100F, so that puts 8MP at quite close. 5400 dpi scanned Reala might do a tad better (after NeatImage, of course). **: http://www.luminous-landscape.com/tutorials/dq.shtml http://www.normankoren.com/Tutorials/MTF7.html David J. Littleboy Tokyo, Japan |
#54
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Harvey wrote:
"Alan Browne" wrote in message .. . Harvey wrote: Trying to be funny when it obviously isn't your forté if that post is anything to go by. OTOH Martin is pretty accomplished photog which counts more around here... http://www.btinternet.com/~mcsalty//...c/disabled.jpg ... One phot of an essay... you can find just as ordinary phots in Nat Geo. Of course we'd love to see your genius in action... -- -- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm -- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm -- [SI gallery]: http://www.pbase.com/shootin -- [SI rulz]: http://www.aliasimages.com/si/rulz.html -- e-meil: there's no such thing as a FreeLunch. |
#55
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Bill Hilton wrote:
From: paul I got a Nikon d70 digital SLR 6MP on the basis that the sensor is larger than the 8mp models even if it's fewer pixels. I'm not really qualified to judge but it seems to me the pics are a bit fuzzy and do not compare to the amazing detail of the 8MP digicams I saw. Run USM on the files ... Canon suggests 300%, .3 radius, 0 threshold to restore the sharpness lost via the AA filter ... probably similar with Nikon. USM should be run per the image detail to define edges without creating artifacts. There is no "one setting" that works for all varieties of images, subjects, lighting and so on. Cheers, Alan -- -- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm -- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm -- [SI gallery]: http://www.pbase.com/shootin -- [SI rulz]: http://www.aliasimages.com/si/rulz.html -- e-meil: there's no such thing as a FreeLunch. |
#56
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"Martin Francis" wrote:
I've looked at film under a microscope and a variety of loupes, and never saw a single pixel... Bet you saw grain out the ass, though. |
#57
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"Joseph Meehan" writes:
Someone on this ng recently said that to do massive enlargements film is still the way to go. I would say large format film is the way to go. :-) I'd say that large format is the way to go. Small-format film has resolution limits just like small-format digital; neither will give you huge enlargements. Large-format film *or digital* will do huge enlargements. Currently, large-format digital is a lot more expensive, and has operating restrictions compared to large-format film, but resolution is available. Dave |
#58
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In the old Kodachrome 25 days it was possible to put down 200 lp/mm on the
film. Then try to calculate an equavialent min. no. of pixels on 24x36 to achicve 200 lp/mm. I guess you will need at least 400 pixels/mm. Max "Matt" skrev i en meddelelse ... I heard someone say that 8Mp digital cameras were the equivalent to 35mm film quality? Does this mean they have the theoretical equivalent resolution? Are they the equivalent to 35mm? |
#59
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"Matt" wrote in message
... I heard someone say that 8Mp digital cameras were the equivalent to 35mm film quality? Does this mean they have the theoretical equivalent resolution? Are they the equivalent to 35mm? Really, really difficult area- comparing film to digital inevitably means scanning film, by which point it is really a comparison of digital capture media. IME, desktop film scanners are largely terrible. Digital is in a league of it's own. Not to say a better or worse league, just different. Sadly, the way it's going, the digital league is seemingly more comparable (numbers-wise) to the NFL, compared to film's World Tiddlywinks Championship. -- Martin Francis http://www.sixbysix.co.uk "Go not to Usenet for counsel, for it will say both no, and yes, and no, and yes...." |
#60
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In article , "Mike Kohary"
wrote: Huh? 35mm is a size - 35mm is 35mm. 6MP is considered approximately equivalent, so 8MP probably exceeds 35mm in terms of resolution. Well, the actual resolution would depend a LOT on the lens used, for example. (with both images). 35mm = 6MP is very simplistic. Lourens |
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