Nikkor 105/2.5 AIS instruction manual

Discussion in 'Nikon' started by ivan_nonov, Jun 17, 2013.

  1. Hello guys,

    I am looking for the instruction manual for this lens. I am particularly interested in the 'Depth of Field' chart (in meters).
    I know that the Generic DOF calculators online are pretty close, but I would really like to get the 'official' numbers. :)
    If anyone has the manual, can you please scan/photograph it and send it to my email -
    Thank you in advance!
  2. You probably already know this, but if you look at the lens you'll see coloured lines marked on the silvery ring between the aperture and focus rings. Those colours correspond to the coloured aperture numbers on the aperture ring and indicate the "official" depth of field limits for those apertures.

    Alternatively, you can stop down the lens to the aperture you intend to use and see for yourself what will be in focus.
  3. I believe there are a couple of the (original?) manuals available on e-bay right now. Just do a search for the lens and they should come up.
  4. Hi James,
    Yeah, I know about the markings on the lens and the DOF preview and I use it, but here I am looking for the exact numbers to the centimeter. :)
  5. Hi Gary,
    You are right. There are manuals here and there, but I don't think it's worthwhile to give at least $10 for such kind of information I am looking for and waiting couple of weeks for it to arrive. :)
  6. I wonder what you're doing to require such precision that an online calculator can't provide?
  7. Hope this works:
  8. Hah.... this is for the pre-AI versions, right? I'm pretty sure it's the same for the AI(s) ones. Jeez... how didn't I see that on!? :D
    Thanks a lot, Gary! :))
  9. This is pre-AI. There were three, of so, different versions and lens formulas but all should behave similarly.
  10. Let me know when you have the jpg so I can pull it out of my gallery. Thanks
  11. Done, you can remove it. :)
    Thanks again!
  12. Here's the same page from the instruction sheet for the AiS version of the 105/2.5 if you want to compare:
  13. "Getting DOF down to the centimetre:"
    The easiest way is to change the focus screen to one that has a small split image. Its called a K screen if I recall.
    Apart from that, the only way is to stop down and check visually. If you use glasses adjust the viewfinder diopter before you start. Without doing that you won't achieve focus reliably.
  14. And while I am at it. how can one have an instruction manual? Or did you mean a spec sheet? Instructions are...
    1. Clean front and rear elements with a brush
    2. Mount on camera
    3. Set aperture
    4. Focus
    5. Shoot
    What else is there?
  15. Thanks a lot for the DOF chart for AiS, Michael! :)
    As I suspected, the data is the same as the one for the pre-AI version.
    BTW, I noticed that the far point when focused at 15m@f/22 is 523.4 meters. Is this a typo? :)
    Should't be infinity at that point?

    Francisco, I get your point. :) It's just that this is how they call these leaflets with the specs. Anyways, you are totally right.
  16. Francisco, how would a split image screen help determine depth-of-field? And how could you possibly judge distances by eye down to the nearest centimetre, unaided and with monocular vision through the viewfinder? In any case, no modern screen shows true depth of field; they're all designed for brightness, not to accurately show DOF.
  17. Sorry, double post
  18. For very critical work, I always found that it worked better to "pretend" that I was one stop less than actual when using the DOF lines on the lens. I know that there is a circle of confusion definition of in focus that never meant as much to me as just being sure that what I wanted in focus actually was.
  19. The DOF is pretty much determined by the photographer his/herself. The chart is no more accurate than doing your own calculation (or using online calculator) it's only the official Nikon definition.
  20. As BeBu Lamar says, DOF charts and scales are at best only approximate. DOF is determined by ultimate image size and viewing distance, subject matter, photographer's taste, and many other factors.

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