I just picked up my first manual legacy lens, and I'm having a bit of a problem with metering and the camera selecting an appropriate shutter speed when in Aperture Priority Mode. It seems that with exposure compensation at 0, the camera will only automatically set the shutter speed up to 1/1.3". As I step down the aperture on the lens manually, the shutter speed indicator begins to blink, indicating that the image will be underexposed, but it will not automatically increase the length of the exposure. I can get past this by upping the exposure compensation, or by simply setting the exposure manually. However, I would like to take advantage of the camera's automatic metering capabilities. Any ideas on why this is?