WA Polarizers

[gus]

Thanks Gus, and yes I did use a polarizer on it. 18-70 DX @ 29mm, A mode f4.


AJ
Hmmm...am looking buying one for my 10-22 & one for my 400. Our light here is very strong & i often cannot get the sky as it is.

Tks.

[DavidTO]

Hmmm...am looking buying one for my 10-22 & one for my 400. Our light here is very strong & i often cannot get the sky as it is.

Tks.

You have to be really careful with polarizers on wide lenses, since the polarity of light changes across the sky, you can end up with shots like this one, where the polarization changes across the image:

http://davidrosenthal.smugmug.com/photos/34051568-M-1.jpg

It CAN work right, but it'll fail more often than narrower lenses.

[gus]

You have to be really careful with polarizers on wide lenses, since the polarity of light changes across the sky, you can end up with shots like this one, where the polarization changes across the image:



It CAN work right, but it'll fail more often than narrower lenses....tks for that. Its the same diameter as my 400 so i will try it on both.

[DavidTO]

...tks for that. Its the same diameter as my 400 so i will try it on both.

Don't let it stop you, Gus, just wanted to point it out to you.

Read more about it here. (http://www.luminous-landscape.com/tutorials/polarizers.shtml)

[thdizzy]

You have to be really careful with polarizers on wide lenses, since the polarity of light changes across the sky, you can end up with shots like this one, where the polarization changes across the image:

It CAN work right, but it'll fail more often than narrower lenses.
David - 2 questions relating to the fact that I just bought the new Tonkina 12-24.

1. Is there any way to avoid the 'blue circle' seen in your image and in my image below -
http://thdizzy.smugmug.com/photos/35388037-L.jpg

2. Will vari-ND filters (Sing-Ray with Cokin P series holder, just ordered) also give me problems when capturing wide?

Thanks in advance for your reply.

[DavidTO]

David - 2 questions relating to the fact that I just bought the new Tonkina 12-24.

1. Is there any way to avoid the 'blue circle' seen in your image and in my image below -
http://thdizzy.smugmug.com/photos/35388037-L.jpg

2. Will vari-ND filters (Sing-Ray with Cokin P series holder, just ordered) also give me problems when capturing wide?

Thanks in advance for your reply.


Maybe a mod can split this off so we don't hijack the thread...

My understanding of polarizing filters is that they are most effective with shooting the sky at an angle 90 degrees from the sun. In other words, they are least effective looking at or away from the sun. But when you're shooting across it, the polarizing filter is most effective. The problem with wide angle lenses is that they cover such a wide area of the sky that these differences become very apparent. That's all I know. Maybe someone else can chime in with a more technical explanation that could help you. But I think it's just something that you have to live with when polarizing wide angle shots of the sky.

[ian408]

I split to give the topic of Polarizers on WA a bit more exposure.

Ian

[pmccurdy]

Where is that picture taken, Todd. That's a spectacular landscape!

Patrick

[ian408]

Where is that picture taken, Todd. That's a spectacular landscape!

Patrick

I think it's from the White Mountains looking towards the Eastern Sierras.

Ian

[thdizzy]

Where is that picture taken, Todd. That's a spectacular landscape!

PatrickIan is right.

I captured that image in the White Mts. an hour or so after sunrise. I am at 10,000 ft. looking West towards the Sierras.

[gluwater]

David_S85 gives a good explanation of Circ Polerizers inthis thread. Hope it helps.

[gus]

David_S85 gives a good explanation of Circ Polerizers inthis thread. Hope it helps.
Thanks glu...i will certainly have a look.

Gus

[gus]

Ok...got my 1st polariser today (gubbs shouldnt we be spelling that with a Z ?)

Off to the rain forest tomorrow to see what greens & blues i can get.

Will you lot please stop helping me find ways to spend $ !!!

Gus

[ridetwistyroads]

what about using two CP's to widen the angles they can block light from? Anyone try this?

[David_S85]

what about using two CP's to widen the angles they can block light from? Anyone try this?
Two polarizers cancel each other out, making it appear that no filter was applied. All you'll get is more vignetting, and more lens distortion from the additional 4 layers of glass. :wink