> > Hello, > I have an EOS 30. Last week i did a symple test with my new gray card. > I placed it in the sun and put my camera on IsO 125 ASA. And did a light > metering with the whole card in the viewer. And i used a 50mm > F1.8 II lens. > I found that the camera was showing 1/250 F16 instead of the > expected 1/125 F16 acording to the F16 exposure rule. > My good old Chinon was showing the right exposure. > > Is this normal behaviour for an EOS 30 or am i doing something wrong ?? > > greeting Jan v. Veen
Hi Jan, The sunny 16 rule is rather wildly variable as can be 18% gray cards even from the same manufacturer. The standard is to hold an 18% gray card at a 45 degree angle for a meter reading. Even so your latitude, time of year, time of day, amount of moisture and dust in the air will affect the EV you get on any given day or hour. Your old meter may just be off. Something to try out that often has surprising results, shoot an image of the your gray card or a nice scene with a roll of medium speed SLIDE film using the camera body's metered exposure value, bracket 1 full stop up and down. Be sure to put a visible note in the frame with the exposure used for the frame. Rewind the film leaving the tail out and reload it into the other body advancing the film 2 or 3 frames past the other camera's last exposure and re-shoot the same scenes using the metered exposure value from the new body, bracket 1 full stop and include those visible notes. In my little experiment I used Kodak Select ISO 100 Ektachrome and a Kodak 18% gray card, my old manual Minolta SRT-101 body and 50mm f/1.4 lens yielded very nearly the same film density at the metered EV as my EOS 5QD and EF 50 1.4USM but with different metered exposure values! They differed by more than 2/3 of a stop in metered EV but the results on film were the same! I also used my trusty 25 year old Pentax Digital Spotmeter and it matched up with the EOS 5QD exactly! Regards, Chip Louie * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
