Variable ND Filter
Can anyone recommend a good variable ND Filter that they have experience of.
I am currently using a Canon 7D and a Canon EF 24-105mm f4 L IS USM Lens and would like to try some long exposure photography. To assist i want to get a ND filter and was wondering whether to start of with a variable filter and if they are any good.
I appreciate that it probably won't be as good as a fixed standard filter, but to start off with think this may give me a good amount of flexibilty for the price.
Any advice would be appreciated.