Re: DR vs. f-stops

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From: Nick Makris (nick@mcn.org)
Date: 09/10/03-11:36:02 AM Z

Keith, Yes - Is that a real number? My situation is that I have a color analyzer that in the white position is able to tell me how many stops there are between base and the most dense part of the neg. Actually, 30 on the scale = one stop. I can increase the range of sensitivity by stopping down the enlarger lense and changing the resistance control, so efffectively I can read an extensive range of values, but I can't seem to find anything that relates that to DR.

This limits my understanding of the comments on the list when DR is being referenced.

Thanks for the reply,

N
  ----- Original Message -----
  From: Keith Schreiber
  To: alt-photo-process-l@skyway.usask.ca
  Sent: Wednesday, September 10, 2003 10:11 AM
  Subject: Re: DR vs. f-stops

  Do you mean something like: 1 stop = 0.3 density units ?

  Keith
    ----- Original Message -----
    From: Nick Makris
    To: alt-photo-process-l@sask.usask.ca
    Sent: Wednesday, September 10, 2003 8:45 AM
    Subject: DR vs. f-stops

    Dear Sensotomitrists(sic),

    For those of you really into the technical side of all this, you probably have the answer(s) to these questions.

    Is there a linear association between f-stops and dynamic range?

    Regardless of whether it's linear or not, what is the association?

    Many thanks,

    Nick

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