Hi, Please try the following test with your F5, any AF-D Nikkor lens and 3D color matrix metering: 1. mount your F5 on a tripod. 2. aim at any scene that can give you step 4 and 5 result. 3. make sure your F5 is in Single Servo AF mode. 4. select center focus area and remember the exposure reading. 5. select other focus area and find a scene that the exposure reading is different from reading of step 4, remember the exposure reading. 6. with the same lighting condition and composition, switch the focus mode to Manual Focus mode. 7. select center focus area and the same focus area in step 5, you will find the exposure readings are different from using AF mode. Actually, after several tests, I found that under the same lighting condition and composition, if the exposure readings are different with different focus areas (even the objects are not in focus, i.e. you don't have to press the shutter release button to get different readings), you will get the same exposure reading with different focus areas when you are in manual focus mode. In conclusion, it seems to me that the 3D color matrix metering only work with AF mode and not with manual focus mode. Is my conclusion right? Or is there something wrong with my F5? Thanks in advance, FS Please use [EMAIL PROTECTED] if you want to send me Email.