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  1. #1

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    feeling stumped by Fuji NPS 160 chart

    On a whim I decided to open up the box that contained the canister for Fuji NPS 160 and read the chart... (time on my hands as passenger in car). I was following quite nicely on the exposure guide but after some contemplation could not figure out the circled 1/2 in the chart. What does that mean? In the chart below it shows +1/2 for exposure compensation but it doesn't show a + or - for the one above. Any thoughts? I'm sure I'm going to be completely embarrased by the answer.
    Attached Thumbnails Attached Thumbnails NPS chart.jpg  
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  2. #2

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    What you couldn't make the image any smaller? From squinting it looks like F/16.5 at 1/250 with full sun. It's just sunny 16.

  3. #3
    Ed Sukach's Avatar
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    Quote Originally Posted by smileyguy
    On a whim I decided to open up the box that contained the canister for Fuji NPS 160 and read the chart... (time on my hands as passenger in car). I was following quite nicely on the exposure guide but after some contemplation could not figure out the circled 1/2 in the chart. What does that mean? In the chart below it shows +1/2 for exposure compensation but it doesn't show a + or - for the one above. Any thoughts? I'm sure I'm going to be completely embarrased by the answer.
    At first, I thought it was a modification of the "sunny 16" rule: "With the shutter speed set to the reciprocal of the ISO film speed, the aperture should be f/16." ... but ... it is going the wrong way. If the shutter could be set at 1/160th second, the aperture would be f/16 ... but most shutters cannot be set at 1/160th. If the shutter was set to 1/125th second, a slightly smaller aperture would be required ... f/16 1/2; f/16.5 - halfway between f/16 and f/22 - seems to be about right. However, the chart specifies 1/250th. Decreasing the exposure time one stop... and that would therefore require a half stop MORE aperture, or f/11.5 at 1/250th.

    Sounds like an error from Fuji (errors happen to the best of them) to me.
    Carpe erratum!!

    Ed Sukach, FFP.

  4. #4

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    I think the first one is "beach" but like I said I can't really read it. Sunny is the second one at F/11.

  5. #5

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    Let me try again with the size... :embarrassed:
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  6. #6
    rbarker's Avatar
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    [SIZE=1]Nick is correct. It's just "sunny 16" with the setting a half-stop higher. [/SIZE]
    [COLOR=SlateGray]"You can't depend on your eyes if your imagination is out of focus." -Mark Twain[/COLOR]

    Ralph Barker
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  7. #7

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    It's just sunny 16 but since cameras don't usually offer 1/160 or 1/320 they adjust the F/stop.

  8. #8

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    And if your camera doesn't have half stop markings I suppose you can't/shouldn't use this film. Many of my camera/shutters only have 1/3 stop markings so I probably should keep using B&W film. ;-)

  9. #9
    Ed Sukach's Avatar
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    Quote Originally Posted by BrianShaw
    And if your camera doesn't have half stop markings I suppose you can't/shouldn't use this film. Many of my camera/shutters only have 1/3 stop markings so I probably should keep using B&W film. ;-)
    Let's see ... the difference between f/ 16 1/2 and f/16 1/3 - is 1/6th of a stop.

    One sixth of a stop??? Do you think that anyone can, or needs to be that accura....

    Oh, wait a minute - a "smiley". That explains it... you are yanking our chains!!!
    Carpe erratum!!

    Ed Sukach, FFP.

  10. #10

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    Thanks for all the brilliant replies, folks!

    So, if I understand this correctly it is a slight alteration of the sunny 16 rule? So the chart is indicating f16 and a 1/2, f11 and a 1/2, etc.?? I must be dense, I don't think I would have figured that out by looking at that chart. Oh well...
    Wesmore Digital
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