ND on long telephotos

Hojomo wrote:

I got the Sigma 150-600mm f/5-6.3 DG DN OS Sports Lens awhile back and had wanted to get a chance to use it more this summer. I am instead planning on doing that this fall in Washington & Oregon to get some landscape and wildlife footage. Also some people/city shots.

The only thing I need to plan for at this point is ND. I will be using both an S1H & Sigma FP to acquire the (4k/6k raw with Atomos) footage. 180 shutter/30fps & going to attempt some slo-mo (to the extend these bodies can) as well.

For the landscape (locked off) shots I want maximum sharpness (FP doesn't have AA filter, so figuring it for these ones) and so I would prefer to minimize any hit from the ND.

What ND system/option would you purchase for something like this? I have multiple options with my other lenses, variable ND & fixed (all screw on). Based on subject I might be 5/6.3 or down to F13 at any given time.

I personally have never needed more than a three stop nd filter for wildlife {bird} video stuff with my telephotos, but once autumn/winter have set in, i rarely need them at all.

That said, i have pretty much switched entirely to vnd's, for their versatility.

As your Sigma has a bayonet-fit hood, you may find that a screw-in hood will allow easier operation of a vnd filter....otherwise you would have to add/remove the bayonet hood to make adjustments to the filter {assuming you intend to use a hood}...which would be a slow/cumbersome method.

Although your sigma takes an 86mm filter, be aware that some 86mm vnd's may have a wider overall diameter than a standard solid filter rim { maybe even have a 95mm front filter thread}, which would probably not allow your bayonet hood to fit over it.