ACTINO - U light meter User manual

Venmo @mike-butkus-camera  Ph. 2083
PayPal Name  Lynn@butkus.org      www.PayPal.me/lynnbutkus

Here  sli"tcr irgain  rqi"c $retii*$  ei' me.iisurinp incidenl
                                liehl.
By this we meon the use of the instrument for meosuring photo-
metric volues pointing it wrth flop shut toword the light source
or comero respectively.
As hos olreody been soid in lhe foregoing, this method is
preferobly used when toking photogrophs in folse liqht. We
lhen meosure the light holding the instrument with flop shut
in the direclion of the object stonding ogoinst the incident Jight.
Meosuring the pholomelric vclue will olso prove necessory when
the incident lighi is more thon sufficient, which is indicoled by
lhe pointer deflecting to lhe right when meosuring in the usuol
      , L      woy with flop open directed to the obiect.
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                  Reflected light meosuring    MD#

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                 lncident light meosuringD           www.butkus.us        A&

l{ere  s?[?c*i *.gain 'iF;e' nrof!5g$';:gs'' me':ssu'ring ,incidenf
           :                      lighl.
By this we meon lhe use of the instrument for meosuring photo-
metric volues pointing it wrth flop shut toword the light source
or comero respectively.
As hos olreody been soid in lhe foregoing, lhis method is
preferobly used when toking phoiogrophs in folse li9ht. We
then meosure the liqht holding the instrument with flop shut
in the direclion of the object stonding ogoinst the incidentlight.
Meosuring the pholometric vclue will olso prove necessory when
the incident light is more thon sufficient, which is indicoted by
ihe pointer deflecting to lhe right when meosuring in ihe usuol
           woy with flop open directed to the obiect.
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           A4rg
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indicotes thot this is the odiustment for o speed of
 24 fromes per second. The omoture movie cqmero user
 con thus reod the shutter speed for on oppropriote
 number of fromes.
 Pholomelry
 ln the post, exposure time wos goged by measuring
 the light reflected by the obiect. ln recent times, o new
'method is procticed, colled photometry, by meosuring
 the light striking the obiect. However, We only re-
 commend this method in coses of very bright illumi-
 notion, €.g., exposures ogoinst the sky, counterlight,
 etc. To perform meosuring by this method, with the
 ACTINO U, close the light odmission window in fronf
 of the photoelectric cJlt ond meosure through the
 white flop. Proper exposure time con then be reod off
 in the monner described obove.
 Speciol ottention is cqlled to the foct thot this method
 is only odvisoble where the first mentioned system is
 no longer odequote, thot is, when light roys of such
 intensity ore encountered thot the opocities in q picture
 completely recede
 For noturo I colour photogro phy, use the sensitivity
 stoted on the film, but increose exposure time where
 dork colours predominote. The volue indicqted by the
 exposure meter is explicit. Possible foctors of error
 ore the loss of light coused by the different types of
 lenses, irregulor shutter operotion, or vorying sensi-
 tivity of film emulsion. We recommend thot fhe" photo-
 gropher study the relotionship between th'e'exposure
 meter ond his comero by first moking .q 'nurnber of
                      www.butkus.us

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