>I have a question concerning the AE-Lock feature on my F70. The manual >says in page number 74 that if you want to use the AE-L button, you >should select spot or center weighted metering. Does anyone understand >why? If I lock exposure on a gray-like surface, then matrix metering >should deliver the same exposure value as center weighted or spot! Generally AE lock used is to limit the meter reading to a particular part of a scene. However, if you use an 18% gray card, then spot, center, and matrix should give the same value. I think their comment is directed at folks like me who "aim" the camera at, for example, some green grassy area that I pre-visualise as appearing 18% gray in the final image. The matrix metering wouldn't have as limited a view as center weight or spot. As mentioned earlier on the Velvia thread, the common consensus seems to be Velvia very saturated = ISO 50 and less saturated (but still very saturated compared to other types of film) is ISO 40. Good luck to you. Douglas Miller [EMAIL PROTECTED]