Filming with DSLR's made it possible to get smooth and pretty Bokeh and DOF however the bad with wide open lenses like F1.2 or f1.4 is that during a sunny day its too bright and you need to set the shutter speed close to 1/4000 however which makes the movements in the shots look choppy. However you can buy ND filters however its annoying to have several different ND filters and needs to stack them get proper lighting to lower the shutter speed to around 1/60. However stacking several ND will lessen the quality of the shot and bad ND filters can cause Redness cause they don't filter the red colours or Infra-red colours enough.
However there is a solution using Vari ND which you dont need to carry tons of different ND filters and can place just one Vari ND filter on your lens and turn the ND filter to adjust the ND stops to change the brightness. However the filters aren't that cheap they cost around 50 to several hundreds of dollars.
The ones from 50 dollars are not that expensive and can be found on Ebay and are shipped from China. However to be really even cheaper than 50 Dollars, you can actually buy two cheap polarisers and stack then on top of each other. It can be two Linear polarisers, a linear in front of the CPL polariser or two CPL polarisers. However if you got two CPL polarisers you need to follow the video below.
DIY Variable ND filter from DvRebellion.com on Vimeo.
However the only bad with DIY Faders are that they are not really build to be perfect ND Faders or Vari ND and in the Higher / Darker ND regions there might be a certain colour change. However it is mostly when the at the Darkest end which not always be used that much.
Also a tip is not to buy CPL for all your lenses cause that would be way to expensive. The best is to buy it for the largest lens mostly that would be a filter of 77mm and then buy stepper or stepdown rings so you can fit the filer on lenses with smaller filter threads.
However there is a solution using Vari ND which you dont need to carry tons of different ND filters and can place just one Vari ND filter on your lens and turn the ND filter to adjust the ND stops to change the brightness. However the filters aren't that cheap they cost around 50 to several hundreds of dollars.
The ones from 50 dollars are not that expensive and can be found on Ebay and are shipped from China. However to be really even cheaper than 50 Dollars, you can actually buy two cheap polarisers and stack then on top of each other. It can be two Linear polarisers, a linear in front of the CPL polariser or two CPL polarisers. However if you got two CPL polarisers you need to follow the video below.
DIY Variable ND filter from DvRebellion.com on Vimeo.
However the only bad with DIY Faders are that they are not really build to be perfect ND Faders or Vari ND and in the Higher / Darker ND regions there might be a certain colour change. However it is mostly when the at the Darkest end which not always be used that much.
Also a tip is not to buy CPL for all your lenses cause that would be way to expensive. The best is to buy it for the largest lens mostly that would be a filter of 77mm and then buy stepper or stepdown rings so you can fit the filer on lenses with smaller filter threads.