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Thread: Scanning old 35mm slides and negatives

  1. #16
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    They're just great and it's the stories and memories which go with them that make them so special.

  2. #17
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    Hi Merv,

    Have done some experimenting this morning. Ideally, I should have done it on the Mallory Park slide but couldn't be arsed to go wading through the boxes to find it!

    The photo of the GB 400 (wish I hadn't sold it) is from a negative. Scanned at 300 dpi in full auto mode, it's 1978 x 1121 px with a file size of 365KB. At 800 dpi, it's 4800x3036 px with a file size of 1.9 MB. At 1200 dpi, it's 7196 x 4488 px with a file size of 3.5 MB.

    One of the photos from our honeymoon (48 years ago!) was scanned from a 35 mm slide. Scanned at 300 dpi in full auto mode, it's 1201 x 1800 px, file size 218 KB. At 800 dpi, it's 3202 x 4798 px, file size 1.28 MB. At 1200 dpi, it's 4805 x 7198 px , file size 2.8 MB

    Cheers,

    Geoff
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  3. #18
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    Hi Geoff,

    Which DPI version/s are the photos of your bike, and you and your wife? When I click them up to maximum size I'm seeing the grain of the film. Your wife's trousers and your shirt are where it seems fairly obvious. IMO you are best to see how each DPI setting looks and settle on the best viewable 'density' before grain becomes apparent. There's no point in scanning beyond that resolution as you're only going to increase the storage capacity (and scanning time) it swallows up with no gain in quality.

    I had quite a few slides taken on 400 ASA film (to save using a flash) which I scanned at relatively low DPI (can't remember details now) for that reason.

  4. #19
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    Lightbulb

    Quote Originally Posted by Naki Rat View Post
    When I click them up to maximum size I'm seeing the grain of the film.
    I doubt that. What you may be seeing is an effect of the jpg compression.

    JPG is not loss-less.

    You can (usually) set the compression rate when saving a jpg file - 1 to 10 or maybe 1 to 12. This can have quite an effect on the size of the output file while not effecting the dpi. But it shows when you blow up very large.

    For the record, I scanned all my slides some years ago with a Nikon Coolscan. It has a native resolution of 2700dpi - so each slide works out at 1944x1296 pixels. I think I used a 6 for the compression - resulting in files at around 135 - 150 kBytes each.

    My suggestion is to scan at the very best resolution you can to get the most possible pixels, then play with the apparent dpi to get an acceptable image size, then choose a suitable jpg compression to keep the files manageable without losing too much of the image quality.

    In case you were wondering, my scanner was/is VERY slow. It took all evening to scan a single complete film.
    =mjc=
    .

  5. #20
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    Quote Originally Posted by Naki Rat View Post
    Hi Geoff,

    Which DPI version/s are the photos of your bike, and you and your wife? When I click them up to maximum size I'm seeing the grain of the film. Your wife's trousers and your shirt are where it seems fairly obvious. IMO you are best to see how each DPI setting looks and settle on the best viewable 'density' before grain becomes apparent. There's no point in scanning beyond that resolution as you're only going to increase the storage capacity (and scanning time) it swallows up with no gain in quality.

    I had quite a few slides taken on 400 ASA film (to save using a flash) which I scanned at relatively low DPI (can't remember details now) for that reason.
    Hi NR,

    The bike (negative) and honeymoon (slide) are both the 800 dpi versions for uploading to KB. I have no idea how they get altered from that when they appear on KB. That graininess you refer to also seems to be apparent when parts of the subject matter is in low light and you increase the brightness slightly. The honeymoon shot at sunset is a good example and it also shows up on the GB400 fairing if you try and adjust the brightness by much.

    I don't actually play with the image much after scanning other than the occasional blemish removal for entirely pragmatic reasons. With one or two exceptions, they will never be printed and only viewed on a computer screen. I simply don't want to spend any more time than absolutely necessary mucking about with them. Jim Cox hit on one of the reasons in terms of time to scan. I mentioned earlier that at 300 dpi, it's about 45 seconds per slide and 1 minute 45 seconds at 800 dpi. I didn't even bother to time 1200 dpi . There are a few which I might get printed and I could spend a bit of time just on them or even give them to a professional printing service.

    I still have maybe a couple of thousand images to process. I'm not going to put any more up here unless I find some bike ones which might be of interest, with the exception of the two below. I took the photos at Duxford in the UK back in 1985. TSR2 supersonic low level nuclear bomber holds special significance for our family. My Dad was in charge of wind tunnel testing of the scale models which lead to the final design. The Duxford TSR2 (there's one at Hendon too) was originally stored at the aeronautics department of Cranfield University when I was there. Quite often used to spend my lunch breaks looking at what they had there, including a Me163 Komet. The other aircraft is a Gloster Javelin all weather fighter. That particular aircraft was used for experimenting with the tailplane configuration. Early models only had a fin and there were a few crashes at high angles of attack when the wing masked the fin. Cool stuff!
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  6. #21
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    re TSR-2: I worked with a guy who was a toolmaker on the TSR-2 project. He told me when the project was canceled (political decision to replace the craft with an inferior US plane) all the jigs and tools that and others had made were cut up for scrap. He said that was the defining moment that made him decide the future England was never going to be anything and to emigrate to NZ.
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  7. #22
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    Quote Originally Posted by pete376403 View Post
    re TSR-2: I worked with a guy who was a toolmaker on the TSR-2 project. He told me when the project was canceled (political decision to replace the craft with an inferior US plane) all the jigs and tools that and others had made were cut up for scrap. He said that was the defining moment that made him decide the future England was never going to be anything and to emigrate to NZ.
    IIRC, there was some talk of buying the F-111 but I think that it was missiles taking over that finally sealed its fate. At the time of cancellation, the landing gear hydraulics still gave problems and there was a major problem with the terrain-following radar but both were solvable. Spot on about the jigs and tooling. It was also done with indecent haste.

  8. #23
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    Geoff,
    just a thought, can you save the scans as a TIFF instead of JPEG? If you can it might be worth trying.

    Just be aware that a TIFF will require more storage space than a JPEG.

  9. #24
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    Quote Originally Posted by Moi View Post
    Geoff,
    just a thought, can you save the scans as a TIFF instead of JPEG? If you can it might be worth trying.

    Just be aware that a TIFF will require more storage space than a JPEG.
    Mark,
    Don't actually know but it comes back to "fitness for purpose" as per my post above. I rarely use anything but jpeg with my digital camera. RAW once in a blue moon!

  10. #25
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    Quote Originally Posted by Blackbird View Post
    The Duxford TSR2 (there's one at Hendon too).
    Not at Hendon, but at Cosford.
    Looks like how I first saw her in the 80's before the spruce up that was well overdue.

    The "replacement" was supposed to be the F-111 (a design concept from Barnes Wallis) but this fell through once the the Americans and that prick Mountbatten had done their damage... The Buccaneer ended up filling the role.

    Typical of poor leadership, too many oars in the water and the result of the labour government killing off this project, was the end of independant British combat aircraft.
    TOP QUOTE: “The problem with socialism is that sooner or later you run out of other people’s money.”

  11. #26
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    Quote Originally Posted by Moi View Post
    Geoff,
    just a thought, can you save the scans as a TIFF instead of JPEG? If you can it might be worth trying.

    Just be aware that a TIFF will require more storage space than a JPEG.
    To get around the KB upload limit i used to scan on High res then do a screenshot of the high res scan.
    Also often a zip file or a PDF take up much less room
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




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  12. #27
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    Quote Originally Posted by Blackbird View Post
    Mark,
    Don't actually know but it comes back to "fitness for purpose" as per my post above. I rarely use anything but jpeg with my digital camera. RAW once in a blue moon!
    Geoff,
    I was thinking when you scan a negative or slide save the scan as a TIFF rather than as a JPEG. I've been told that a TIFF does not degrade in the way a JPEG can if you want to "adjust" it post scan.

  13. #28
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    Quote Originally Posted by Swoop View Post
    Not at Hendon, but at Cosford.
    Looks like how I first saw her in the 80's before the spruce up that was well overdue.

    The "replacement" was supposed to be the F-111 (a design concept from Barnes Wallis) but this fell through once the the Americans and that prick Mountbatten had done their damage... The Buccaneer ended up filling the role.

    Typical of poor leadership, too many oars in the water and the result of the labour government killing off this project, was the end of independant British combat aircraft.
    Yep, the F-111 had some problems with the wing deployment mechanism. One actually crashed on Cranfield University airfield on its way to base at Upper Heyford. The wings wouldn't deploy after a high speed run across the North Sea. The crew ejected in their containment module and were fine.

  14. #29
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    The TSR2 - such a shame, like the Avro Arrow - great aircraft killed off by policians.
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  15. #30
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    Quote Originally Posted by TheDemonLord View Post
    The TSR2 - such a shame, like the Avro Arrow - great aircraft killed off by policians.
    I read an article about the Arrow quite recently and it was a heck of a good aircraft. It just goes show that you can't trust politicians to do the right thing. Sadly, US business and political influence were, and still are behind a lot of innovative ideas from other countries getting killed off.

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