Compensation for Circ Pol?

[russellsnr]

Hi, I use a hand held spot meter for exposure and normally shoot or try to shoot land/seascapes, I am going to visit a museum and will need to shoot through glass at subjects lit artificially, when I shoot outside I compensate by 2 stops when adding a polarizing filter. To try and reduce reflections from the glass I will use the pol filter so will I still need to compensate exposure by 2 stops?
Thanks
Russ

 

[Garry Edwards]

Assuming that you're shooting digital and in raw, a 2 stop compensation will be in the right area.

As always, the effectiveness of the polarising screen and the amount of compensation needed will be affected by the angles.

 

[markmullen]

Hi, I use a hand held spot meter for exposure and normally shoot or try to shoot land/seascapes, I am going to visit a museum and will need to shoot through glass at subjects lit artificially, when I shoot outside I compensate by 2 stops when adding a polarizing filter. To try and reduce reflections from the glass I will use the pol filter so will I still need to compensate exposure by 2 stops?
Thanks
Russ

Yes, there or thereabouts. I often find museums pretty dark inside so you might need to ramp up the ISO quite high to get a decent handholdable shutter speed, a lot of museums won't allow tripods.

 

[russellsnr]

Thank you for the replies and mark hit it on the head, tripods are not allowed
Russ