B+w Cpl

[babykailan]

i had a hoya cpl and there is a white marking to indicate the neutral position (i think!) .
is there a neutral position for the b+w cpl? i have the 67mm slim cpl.

[Isaiahfortythirtyone]

neutral position? hmm why would u wnat a neutral position? a CPL can either give u bluer skies or a warmer looking image. just look thru the viewfinder and decide which u want. (: btw, are u the same babykailan from HWZ?

[babykailan]

Originally Posted by Isaiahfortythirtyone neutral position? hmm why would u wnat a neutral position? a CPL can either give u bluer skies or a warmer looking image. just look thru the viewfinder and decide which u want. (: btw, are u the same babykailan from HWZ?

yes. the one and only babykailan in sg.

i want a neutral position because i want to use it as a reference point to make sure i did not overdo the polarization.

[unseen]

you do know the 90 degree rule ya, for max polarization effect..
heh heh it's not called "neutral" position. It's just a marker that if you point towards the source of light, you'll get the greatest polarization effect.

[babykailan]

Originally Posted by unseen you do know the 90 degree rule ya, for max polarization effect.. heh heh it's not called "neutral" position. It's just a marker that if you point towards the source of light, you'll get the greatest polarization effect.

all i am asking is is there a position in the cpl which gives me an unpolarised effect, or at least the min. effect. and is this position indicated clearly - with a marking or above the words B+W .. or? lol...

i want to be able to see the frame i am taking before and after the polarization. i am not asking about the technical aspects of taking good polarized photos.

[student]

Originally Posted by babykailan all i am asking is is there a position in the cpl which gives me an unpolarised effect, or at least the min. effect. and is this position indicated clearly - with a marking or above the words B+W .. or? lol... i want to be able to see the frame i am taking before and after the polarization. i am not asking about the technical aspects of taking good polarized photos.

In any polarizer, there is always a position where the polarizing effect is maximal, and another position where the polarizing effect is minimal.

However there are many factors that affect the polarizing effect, such as direction of sun (and light) that makes using such "guide" as in the hoya filter a joke. These are gimmicks that cheaper products use to confuse and attract customers.

When you use a polarizer, look through the viewfinder to determine the effect you want, from minimal to maximal.

[babykailan]

oh.

can i surmise that there is no so-called "neutral" position in a cpl then? that is because what is "neutral" in a certain angle, may not be "neutral" in another angle due to how a cpl works?

in that case, i will probably leave the b+w cpl where it is after the last shot and adjust again for the next shot, instead of returning it to a "neutral" position everytime after a shot. i know it sounds silly but i'm such a control freak. lol...

[student]

Originally Posted by babykailan oh. can i surmise that there is no so-called "neutral" position in a cpl then? that is because what is "neutral" in a certain angle, may not be "neutral" in another angle due to how a cpl works? in that case, i will probably leave the b+w cpl where it is after the last shot and adjust again for the next shot, instead of returning it to a "neutral" position everytime after a shot. i know it sounds silly but i'm such a control freak. lol...

I do not know what you mean by "neutral".

To me, "neutral" in a polarizer is minimal polarizing effect. From then on, it is a gradual increasing polarizing effect to the maximun, provided the light circumstances are such that a good polarizing effect can be achieved.

If you are a control freak, then you should not use such a "neutral" line as set by the manufacturer who should know better. Use what your eyes tell you.

If you are a control freak, then you should "control" everything, such as determining the "settings" of exposure yourself, instead of letting the camera do it for you.

[kongping]

I have a B+W 77mm Slim CPL.

There is no 'neutral' mark.

[panzerpunk]

Intensity = Max Intensity x cosA x cos(pi/2 - A)

where A = Angle of polariser from pi/2 and thus pi/2 - A is Angle of analyzer