polarisers

[jeanie]

how do you use a polariser?screw on and fire away?

can photoshop CS2 replicate the end result of using a polar?

[Henessy]

I don't think cs2 can replicate the same thing. If I am not wrong, you are supposed to screw on the polariser and shoot.

[ryuggen]

screw on the polarizer and turn the front panel. It gives a 'more blue sky'. Not only that, you can shoot through glass, water and flat area without much reflection.

[Deadpoet]

Originally Posted by jeanie how do you use a polariser?screw on and fire away? can photoshop CS2 replicate the end result of using a polar?

Photoshop will not be able to recreate teh effects of a polarizer.

Here is a good link to a very comprehensive yet simple explanation.

http://www.cs.mtu.edu/~shene/DigiCam...polarizer.html

[ortega]

a pola's main purpose is to cut polarised light

after putting it in front of your lens, you still need to fiddle around with it for maximum effect

[jeff49er]

FYI the BW cir polarizers 77mm at CP are sold out

No choice I had to get the Hoya.

Cir polarizers are good for outdoor shoot and have to use your fingers to rotate till u get the effect u want.

[glensky]

Originally Posted by jeanie how do you use a polariser?screw on and fire away? can photoshop CS2 replicate the end result of using a polar?

hav commercial plugin 4 that.

[ernest_ted]

most of the time the lens hood gets in the way, esp during rotating the filter...

mayb thats me

[zac08]

Originally Posted by glensky hav commercial plugin 4 that.

Well, then.... pray tell... how do you replicate the effects of a CP-L when you're shooting at surfaces of water and trying to capture the fishes just under the surface without the CP-L and using CS...

[blive]

Originally Posted by ernest_ted most of the time the lens hood gets in the way, esp during rotating the filter... mayb thats me

Well, don't use lens hood. Use your hands if neccessary to shield the sunrays.

[ernest_ted]

Originally Posted by blive Well, don't use lens hood. Use your hands if neccessary to shield the sunrays.

for my case sometimes not easy nor possible..
if u r using 17-35mm or 28-70mm fairly easy and still possible
if u r using 70-200mm cannot lah too heavy

[jeanie]

but people told me polarisers must shoot what 90 degrees to the sunlight or whatsoever.can someone explain in detail?

[ortega]

Originally Posted by ernest_ted for my case sometimes not easy nor possible.. if u r using 17-35mm or 28-70mm fairly easy and still possible if u r using 70-200mm cannot lah too heavy

use a tripod?

[ortega]

Originally Posted by jeanie but people told me polarisers must shoot what 90 degrees to the sunlight or whatsoever.can someone explain in detail?

something like that, but best is to use your eyes and judge as you turn the pola
once you see what works best, just go for it

[jeanie]

Originally Posted by ortega something like that, but best is to use your eyes and judge as you turn the pola once you see what works best, just go for it

so i meter with the polar on?
or meter first then polar on?

[ortega]

Originally Posted by jeanie so i meter with the polar on? or meter first then polar on?

you have ttl metering so meter with pola on

[Michael]

Originally Posted by jeanie but people told me polarisers must shoot what 90 degrees to the sunlight or whatsoever.can someone explain in detail?

This time for the public, but only the short version

light is a funny thing, it acts sometimes like a particle and sometimes like a wave. With a polariser we are using its wave properties. As the sun light travels through the atmospere it is scattered or spread causing the blue sky during the day and reddish skies at dawn or dusk. Scatter light is polarized and it is strongly polarized perpediculare to the direction of primary source (the sun). Hence, polarizing effects are strongest 90deg to the sun.

let me know if you want the long version as well...

[Hobbesyeo]

Originally Posted by jeanie so i meter with the polar on? or meter first then polar on?

What I do is to compose first, then turn the polariser until i get the effect i want, meter then shoot.

[Michael]

Originally Posted by jeanie so i meter with the polar on? or meter first then polar on?

with pola on, cause in any case you loose about 2 exposure steps...

[jeanie]

Originally Posted by Michael This time for the public, but only the short version light is a funny thing, it acts sometimes like a particle and sometimes like a wave. With a polariser we are using its wave properties. As the sun light travels through the atmospere it is scattered or spread causing the blue sky during the day and reddish skies at dawn or dusk. Scatter light is polarized and it is strongly polarized perpediculare to the direction of primary source (the sun). Hence, polarizing effects are strongest 90deg to the sun. let me know if you want the long version as well...

you know me.i want the full details.i dun wan to learn 1/2 1/2 bucket of water.

so HOW do i measure 90degrees?