I've been reseaching Renaat, Polar Pro, and SRP ND filters but I'm having a hard time making a decision. Any help from folks actually using these products would be greatly appreciated.

I'm just interestred in the best product, nothing else.

Just ordered a set from Renaat based on other feedback I've seen here.  Looked at a few others.  Bought a Tiffen 37mm ND.  It works well enough, but as others have expressed as well, I have to wonder if the weight will be a long term issue for the gimbal.

I've been using the ND8 CP and ND16 CP on my phantom3.  Same Same as inspire.    I find the the ND16 CP was too dark on overcast day and you had to run shutter speed at 1/50 to get good light but there was too much blur.   That's at 100 ISO.   The ND8 CP did very well at both 4K and 1080P  at shutter speed 1/60.      Video was pretty good.   If I had to buy one, it would be the ND8 CP from SRP.      I'd only use the ND16 CP on a very bright sunny day with sun overhead- no overcast.   

I own the full set of filters from Renaat.  I can't complain really about their quality or how well they work.  For the money... I'm very happy with the results I'm achieving and Renaat was a pleasure to work with!   Would I like a CP in addition to the ND?... Yes, and that's what SRP is offering.  I've used SRP ND/CP filters on a GoPro and they are really quality products as well but I can't speak for the new I1 versions as I haven't used them myself.  

Thanks guys! Anyone using the SRP CP/ND filters that can speak on their quality and effectiveness?

FYI . . . DJI is now offering their own ND filter . . . http://store.dji.com/product/phantom-3-nd4-filter

Rob88 Posted at 2015-7-15 00:30
FYI . . . DJI is now offering their own ND filter . . . http://store.dji.com/product/phantom-3-nd4-f ...

That's for the Phantom 3, i assume the OP is talking about Inspire ND filters. I recently tested the Renaat and Polar Pro sets, more info here...

http://www.pauljoy.com/2015/06/i ... t-2-renaat-filters/

http://www.pauljoy.com/2015/06/learning-to-fly-inspire-filters/

I've not tried the SRP filters yet but from my testing I'm currently using the Renaat filters.

InspirelessAggi Posted at 2015-7-1 06:47
I've been using the ND8 CP and ND16 CP on my phantom3.  Same Same as inspire.    I find the the ND16 ...

You should always use 1/48, 1/60, 1/120 shutter speeds at 24, 30 and 60fps video (respectively). The Inspire lacks 1/48 and (iirc) 1/120 so adjust to 1/50 and 1/125.

Basically, always shoot at shutter speed that is 2x your frame rate unless you're going for a specific look.

SimplePanda Posted at 2015-7-15 02:50
You should always use 1/48, 1/60, 1/120 shutter speeds at 24, 30 and 60fps video (respectively). T ...

True but I lean towards a faster shutter for less blur sometimes.  1/50 is my lower limit

InspirelessAggi Posted at 2015-7-15 04:48
True but I lean towards a faster shutter for less blur sometimes.  1/50 is my lower limit

To each their own. Turned out fine for Janusz Kamiński, after all.

SimplePanda Posted at 2015-7-15 07:40
To each their own. Turned out fine for Janusz Kamiński, after all.

Yep, but no so great for Jared