Photo's too bright on slow shutter speed with Nikon D3100?
I can take slow shutter pictures at night with no problems, see the link below
I could take a picture like that just fine by lowering the ISO to 100 and putting it on a 15 second shutter speed but if I try to take a picture during the daylight ( of water for example) its too bright
do I need a neutral density filter? If so what type as I'm so new to this
is this okay?
No, you need to pay attention to your meter.
You don't NEED a 15 second exposure in daylight, you need to learn about exposure. Reflections from water, and other non-metallic surfaces, can be controlled using a polarising filter.
Neutral Density filters DO allow long exposures in daylight, and there's a place for such things (most of us like it when there's enough light to play with) - but you have to learn the rules before you break them.
First off, you need to learn what your camera's telling you, so learn what the exposure meter and those numbers and flashing lights in the viewfinder mean.
Your photo is too bright because the aperture can't go less than f32 or whatever the minimum aperture of your lens is at the shutter speed you chose.
You can take long exposure photos in daylight using a lot of and filters or an and fader, e.g. In the link and the second link is a photo I took with this type of fader at its darkest setting.
Chances are if you are not in manual mode, you are exceeding the parameters of your lens. Does the display flash HIGH or LOW?
If you are in manual mode, what does your exposure meter say?
And with 15second shutter even when stopped down fully and with ISO 100, you will likely need a and filter. I would suggest a 2 or 3 stop filter.
During the day time, you do not need a shutter speed of 15 secs for normal shots. But if you want to take moving water and blur the movement, then you would need probably just 2 to 5 seconds. AND use the smallest aperture you have on the lens.
If you are still getting over exposure then a and filter would help.
Can you lower the ISO below 100?