Circular Polarising Filters

[Eyon]

I have found myself shooting pictures of something called a Seabreacher recently. It's kind of a jet ski come submarine come ultimate toy type thing for the water. Ive never photographed water based subjects and was wondering the benefits of a polarising filter to add to the end of my lens.

Given the below shots, what would I be set to gain from the filter? Would it improve my photographs with less water reflections, or is it pointless with so much movement?

95mm polariser for my Sigma 150-600 is £££ and wouldn't want to waste the money on one if the benefits were minimal or none.





Advice appreciated.

 

[Kodiak Qc]

what would I be set to gain from the filter? Would it improve my photographs with less water reflections, or is it pointless with so much movement?

A CPL does wonders as long as you understand it powerful but nar-
row filed of effect. Light must be coming at a +/- 90° angle to the lens
considering the reflective surface as the base of the angle.

Since the CP is dealing with light, the movement itself is insignificant
but in one aspect: if it takes the reflective surface too far over or under
the said 90°. At that point, it acts like a neutral density filter.

 

[HoppyUK]

For darkening blue skies, the polarising angle is 90 degrees, but for reflections it's 30-40 degrees to the surface (Brewsters Angle). Reflections on the water will be around that, making it darker, but I'm not sure what benefit that would be and you'd lose 1.5-2 stops of light.

 

[Eyon]

Thanks for the help chaps, I think you've saved me £200! Due to the nature of the subject, I can't guarantee the direction which I'll be facing from the Sun so it seems pointless to buy the filter.

Cheers,
Ian

 

[Stumpy]

What an amazing thing. Looks like the mini sub from the Tin Tin books.