blur effect

ive seen shots with waterfall's being blurred or fog rolling over a city but it has a water blur effect. what function is this on the canon camera's. av, tv?

I just shoot in raw with 25 second exposure.
HTH

Paul

It is the result of a long exposure. For waterfalls, maybe 1-2 seconds. For fog rolling, probably several minutes.

Welcome to POTN. A GND filter (graduated neutral density) is a necessity when in mid day light and in other situations when you need the slow shutter speed to blur the water without overexposing the overall scene. You must also use a tripod to remove any chance of blur caused camera shake. I usually shoot in M. If you want to stay with either Av or Tv, Tv would be the mode to use. That way you are setting the shutter speed for the effect you want.

Mike R wrote in post #9267487
Welcome to POTN. A GND filter (graduated neutral density) is a necessity when in mid day light and in other situations when you need the slow shutter speed to blur the water without overexposing the overall scene. You must also use a tripod to remove any chance of blur caused camera shake. I usually shoot in M. If you want to stay with either Av or Tv, Tv would be the mode to use. That way you are setting the shutter speed for the effect you want.

I think the OP will find a regular neutral density (ND) filter to be what they are looking for if they are struggling to get a slow enough shutter speed in good light for the blur that they desire.

A graduated ND filter is only dark across one fraction, in order to darken a sky in a landscape photo while leaving the exposure of the land untouched. It is a tool to manage too great of a dynamic range.

JeffreyG wrote in post #9267497
I think the OP will find a regular neutral density (ND) filter to be what they are looking for if they are struggling to get a slow enough shutter speed in good light for the blur that they desire.

A graduated ND filter is only dark across one fraction, in order to darken a sky in a landscape photo while leaving the exposure of the land untouched. It is a tool to manage too great of a dynamic range.

Agree. The GND filters I use are rectangular and large enough to use like an ND filter but I still consider them GND filters. You're right an ND filter is what he should consider when sky isn't involved in the composition.