Hi I am using a Nikon D100 with a Quantary 70-300mm lense, and two zoom lenses (teleconverters 2x and 1.4x). When I click to take the picture, it shows OFF (blinking) at the control panel (in place of shutter speed). And doesnt take picture. One out of 5 times, it does take pictures. But other times it will just show OFF. I am working on an optical experiment. If any body could solve this, it would be really appreciable, as I just have 2-3 more days to work on this experiment before I leave this place. Best Alok
