You can buy the Freewell K2 at this link at the discounted price of $349 for a limited time http://gopb.co/k2

What was initially just a look at an impressive variable ND system became a video about understanding all the different types and associated problems. I couldn't understand the difference between the K2 and Freewell's previous ones and all the others I had. They wouldn't tell me, so I had to find out for myself!

The research and tests I needed to do were endless, as there is so much misinformation and a substantial lack of understanding about them.

I hope I have clarified everything here, and it will make you finally understand why your variable ND behaves a certain way. I learned so much making this, and I hope you do too from watching it.

Affiliate links (THANK YOU!)

Sony ZVE1: https://gopb.co/zve1
Sony a7R V: https://gopb.co/a7rv

Tamron 35150mm F/22.8: https://gopb.co/tamron35150
Sony 24mm F/1.4 GM: https://gopb.co/sony24
Sony 35mm F/1.4 GM: https://gopb.co/35mmgm
Sony 35mm F/1.8: https://gopb.co/sony35
Sony 100400mm GM: https://gopb.co/sony100400

Xrite colour checker passport: https://gopb.co/xrite

Freewell magnetic VND: https://gopb.co/freewellmagvnd
Freeewll split VND: https://gopb.co/freewellvnd

My cat channel: @OneManFiveCats

0:00 Introduction
2:29 Initial tests
4:31 What are polarisers?
6:01 What type of variable NDs are there?
7:47 The Variable ND colour shift and the problem with Dual CPL VNDs
9:28 The problem with linear polariser variable NDs and the K2 solution
11:08 Filming screens with variable NDs
12:13 Why variable NDs need to be split range
12:59 The Freewell K2 advantage
14:35 Drop in filters for the Freewell K2
15:46 The things I don't like about the Freewell K2
17:07 Sony FX6 electronic variable ND
17:47 Final thoughts