Inconsistent exposures with D90

[owen_farmer]

<p>Thanks for the the responses. David Ralph's info that matrix metering should not be used with polarizing filters is appreciated. I made some measurements comparing the D90 exposures with readings from my Sekonic L-308S as follows. I laid a gray card on the grass in bright shade on a sunny day. At 1/30 sec the Sekonic read f8.0,6 (about 1/2 an f-stop between f8 and f11 for both reflected and incident readings. I set the camera to shutter-preferred at 1/30 sec and the 16-85 lens to 50mm and the ASA at 200, non-auto. I moved close enough to fill the viewfinder with the gray card image, focussed and shot. With matrix metering the pix info showed f7.1. With centerweight the pix info was f9. This says to me that matrix metering should not be used for atypical scenes. The centerweight reading was about +1/3 f-stop compared to the Sekonic. That agrees with my observations of actual photo exposures, ie., that I should usually set the camera to -1/3 exposure compensation.<br>

Owen</p>