Circular Polariser question

[Big_Ham]

I'm going to be using one for the first time next week when I go and shoot loads of cars, hopefully it'll be sunny etc.

It's a Hoya filter, but my only question is why is the end spinable, and why is there a line on the edge of it.

Surely since it's a circular polariser it shouldn't make a difference which way it's rotated?

Thanks

BH

 

[CSB]

It rotates so you can change which part of the frame the polariser is effecting. Best thing I can suggest is go out and try it.

 

[Canon Bob]

.

Surely since it's a circular polariser it shouldn't make a difference which way it's rotated?

It's because it's a circular polariser that you have to rotate it.

Maybe read this to help you understand.

Bob

 

[Teshi]

It rotates since it increases or decreases the amount and angle of the reflection bouncing off the surface.

This gives you as the user to decide where to reduce reflections the most. As the sun moves throughout the day, so does the origin of light. By giving the user control, it can be handled. It will not eliminate it completely but reduce in certain parts which you will notice.

Come evening, I would recommend taking it off.

Heres one with a polariser used to reduce reflections on the side panels

If I used it on the windscreen, I would have run the risk of reflections from other cars at the shoot which I did not want.

Hope that helps.

 

[Big_Ham]

What a read Bob, so twist it until it looks right then. .

Thanks chaps.

 

[mrgubby]

And here is a composite test shot using one to remove windscreen glare

 

[jockwav]

That is a great example.

 

[andyred]

And here is a composite test shot using one to remove windscreen glare

I must say, this is a fantastic example to highlight what / how one works

 

[mrgubby]

That is a great example.

I must say, this is a fantastic example to highlight what / how one works

Thanks , it's one my favourite shots

 

[rickj]

I use one all the time when taking pic of koi in the bowls as it takes of the reflections