treciprocity.1 - filmtools - various tools for photographic film development and darkroom printing
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       treciprocity.1 (703B)
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            1 .Dd $Mdocdate$
            2 .Dt RECIPROCITY 1
            3 .Os
            4 .Sh NAME
            5 .Nm reciprocity
            6 .Nd calculates compensated exposure time for film reciprocity failure
            7 .Sh SYNOPSIS
            8 .Nm
            9 .Ar film
           10 .Ar time
           11 .Sh DESCRIPTION
           12 Photographic films suffer from low-intensity reciprocity failure
           13 during long exposures (usually >1 s). This program returns the
           14 compensated exposure time.
           15 .Bl -tag -width Ds
           16 .It Ar film
           17 specifies the film type and can be one of the following:
           18 .Bl -bullet -compact
           19 .It
           20 panf
           21 .It
           22 fp4
           23 .It
           24 hp5
           25 .It
           26 delta100
           27 .It
           28 delta400
           29 .It
           30 delta3200
           31 .It
           32 sfx
           33 .It
           34 xp2
           35 .It
           36 acros
           37 .It
           38 tmx
           39 .It
           40 tmy
           41 .It
           42 tmz
           43 .It
           44 trix
           45 .El
           46 .It Ar time
           47 is metered exposure time in seconds or format MM:SS
           48 .El
           49 .Sh AUTHORS
           50 .An Anders Damsgaard Aq Mt anders@adamsgaard.dk