Is this iris useful?

[MrChipShoulder]

Now the FWB601 has gone and the endless agonising days to wait for my new LG400 to arrive form the sop, I'm turning my thoughts to a new iris.

Up until now I have been using my basic Gehmann 510. It has served me well in bell target due to the varying amounts of light we have to deal with.

Being as the new Walther is a very high end rifle, I have been looking at 'full on' Gehmann iris, this one 'seems' to have all the toys :-

https://www.intershoot.co.uk/acatalo...Seller-31.html

I know the hole size is useful, but are the colour filters and twin polarisers? What exactly is a polariser? I did ask a team member if the colours are useful in bell target and he said they very much are due to the varying glair from the lit target face.

The rifle maybe over kill for bell target, so why not go overkill on the iris

Any thoughts?