Circular Polarizer

[MattF]

Hi,

I just received a HOYA 62mm circular polariser for my 450D with Tamron lens. When I try to take pictures with it, I set the shutter speed to something like 1/400, and when focusing in the viewfinder, the aperture value flashes, and won't take the picture. As soon as I remove the polariser, this problem is fixed, and I can take the picture with 1/400 shutter speed.

So why does the camera need slower shutter speeds with the polariser on?

Thanks,
Matt

 

[andrewc]

A polariser cuts at least one stop of light, so it was telling you it couldn't correctly expose at that speed.

 

[MattF]

I was trying to use it about an hour ago. The sky is grey and lighting is pretty bad. Will I still have the same problem when taking a landscape in the bright sun of midday, with blue skies?

I think I need a tripod..

 

[Hawker]

Will I still have the same problem when taking a landscape in the bright sun of midday, with blue skies?

I would doubt it, I'm sure you'll be fine, I use mine all the time outside and can't remember having any problems using it hand held. Just remeber it's on when the light goes or it gets dark

 

[andrewc]

Does it work if you leave the shutter speed at 1/400 but raise the ISO or open up the aperture?

 

[Dino f]

How about just switching to Apt priority
Dean

 

[jerry12953]

With my polariser and 50ASA film I used to be shooting on about 1/45 second at f5.6 most of the time, and usually had to use a tripod.

So at 100ASA that would be 1/90th at f5.6.

Polariser cuts out about 2 stops when used at max.

 

[33L]

i always tend to shoot landscapes on tripods anyway but im sure i could get away without one for half the shots.