TG-06 and shutter speed

PuravidaUK wrote:

However, on a discussion in a different forum, a couple of people with the camera say this only works in flash mode - and that with ambient light the camera appears to ignore the selected shutter speed when their is less light.

Of course it ignores the selected shutter speed under low light conditions. Think of it. Suppose you set minimum shutter speed to 1/200 and maximum ISO to 800 (the highest that I personally find to be marginally acceptable for the TG-6, YMMV). So you sit in a dimly lit room and try to take a photo. If the camera honored the requested shutter and ISO values you'd have a grossly underexposed photo. No way around that except to get a large sensor camera that can take acceptable photos at much higher ISOs. Here's how I tried to explain the TG-6's auto ISO operation in a different forum:

"Minimum shutter speed works in aperture priority mode with flash turned off—within limits. Let's say you've used "Custom Menu>C>ISO-Auto Set" to set minimum shutter speed to 1/500 (the fastest possible) and maximum ISO to 400 (the slowest possible). And let's say you've set aperture to f/2.8 (or whatever). In very bright available light the camera will go to default ISO (100) and use a faster shutter speed than 1/500 in order to avoid overexposure. As available light is reduced, the camera will slow shutter speed and maintain default ISO until a shutter speed of 1/500 is reached. With still lower light, the camera will begin increasing ISO while maintaining 1/500 shutter speed. Once available light is so low that ISO 400 at 1/500 results in underexposure the camera will start reducing shutter speed as needed. (Obviously, setting maximum ISO to a higher value will give you more latitude here.) Aperture is fixed all the while. This is how it's supposed to work, and it does. I use it all the time to shoot fast-moving fish while snorkeling."

All that said, during daylight snorkeling there is usually enough ambient light to get a proper exposure within the selected auto ISO parameters. And even if there's not quite enough light the camera will try to keep the shutter speed as close to the speed you've selected as possible.