Archived posting to the Leica Users Group, 2001/09/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Everything I've read, including the information sheet packed with my new filters, indicates that the filter factor for a Medium Yellow filter (Y2) is 2X, or 1 stop. So, while checking my gear this morning I decided to check the needed exposure compensation using two Pentax spotmeters, the digital Zone VI modified meter and the standard, but calibrated, Spotmeter V. Both showed that the needed exposure compensation would be about 1/3 stop more with the filter than without. I metered off a white truck, the overcast sky, and a building. Always about 1/3 stop. Off some other colors there was a slight difference in the readings between the Zone VI meter and the standard meter, which is to be expected, but in no circumstance did either of the meters indicate the need for an additional full stop with the Y2 filter. I suspect this discrepancy may be due to the sky being overcast and there being less blue light for the filter to absorb. Since I'll be doing some work with hand-held meters and manual cameras, can we discuss this situation a bit. One thought that crossed my mind was to make the exposure readings off a grey card, which I'll try later when I'm outside and away from the computer. Any thoughts on that idea. - -- Shel Belinkoff mailto:belinkoff@earthlink.net - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html