Neutral density lens filter

[tamcrochet]

Ok, earlier I was asking about water proofing my camera. So I had to make a trip to the camera shop. I found the rainsleeves there and that is all set, but I had to stop and look at the other goodies.
I ended up getting a lens filter to try out. It's a Neutral Density (ND4x). The photo on the box makes it look like it would be fun at Niagara Falls to capture the flowing water.
Anything I should be aware of while trying this lens out?
Also should I still have the UV lens on at the same time?

[goldboughtrue]

Nothing to be aware of using the ND filter. It's basically a dark piece of neutral colored glass to let less light in so that you can use a longer shutter speed in brighter light than normal. There's no reason to stack your UV filter because the more filters you have on, the lower the IQ. If you use high quality filters the IQ won't degrade by much, but there's no reason to have more than you need.

[Tdragone]

If you're trying to get Niagra in the liddle of the day; you'll need more than a 4x filter to smooth out Niagra. For an additional 2 stops; slap your polarizer on with it for more effect.

Good Luck, use a good tripod ad post pics!

[tamcrochet]

I have lots of pics, but with 100 6th graders I didn't get to work much with my filters. I will post as soon as I download them. I had a great shot lined up with a rainbow but it didn't show up well. I live near NF so I can go back anytime that I want, and I plan to this summer. My shotting was cut short due to a student passing out from the heat. Where should I post the pics? Under sharing photos? Is there some gadget out there to help with rainbow photos?

[argyle]

Rainbow shots can be tricky...ideally, you'd like to have a darker background (storm clouds, dark blue sky, etc) to make the rainbow stand out. Also, an ND filter wouldn't be much help...you'd get much better results with a polarizing filter...