Archived posting to the Leica Users Group, 2001/09/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Use a camera with a TTL meter. M6, any R camera, and let the camera worry about it. For my 4x5 camera, I use a Gossen Luna Pro Digital. It will read the filter and program the filter compensation into the meter. It seems to be right on and sometimes disagrees with the info that is on or comes with the filter. They couldn't put "factor = 1.83x or 2.36x. But the Gossen can read that and set itself up appropriately. Love that Gossen Luna Pro Digital for outside work, the Luna Star F2 for inside work. Same electronics, different package. Jim At 11:53 AM 9/16/2001 -0700, you wrote: >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 - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html