Where did these stripes come from?

[Lars Daniel]

Can you guys help me here?
I would like to know what is the cause of the "light rays" in the upper right part of the sky?
I used a polariser (B+W linear), Lee ND grad and red filter. Lens is 90mm SA.
Sun was about 90 degrees right.

http://farm5.static.flickr.com/4099/4872434315_114555c764_z.jpg

[GPS]

Flare.

[evan clarke]

Sheet type filters in a Lee holder can produce reflections which can flare especially with a double filter setup like you had going...EC

[Lachlan 717]

How was it processed?

[Lars Daniel]

I am wondering if I had avoided it if I had shaded the filters from the sun coming from the side.
@Lachlan: Taco style in Peterson drum. But I do think it is optical.

[Lachlan 717]

I'll go with your thoughts on development not being the issue:

To me it looks like the Polariser is picking up stress lines on one of the pieces of glass in front of it. I am assuming here that the Polariser is behind at least one of the filters.

If you have ever looked through Polarising sunglasses whilst driving, you see similar patterns on tempered glass used on car windscreens and windows.

If this is an ongoing issue, you'll need to do some testing by removing one element of the set up at a time and taking test shots.

Also, perhaps PM Jay DeFehr in relation to this possibly being a taco issue?

[Lars Daniel]

To me it looks like the Polariser is picking up stress lines on one of the pieces of glass in front of it. I am assuming here that the Polariser is behind at least one of the filters.
Nope, the pola was in front (as it should).

[Jay DeFehr]

I know of no development defect that could explain this particular pattern. Looks optical to me, too.

[Lachlan 717]

Thanks, Jay.

I've never Taco'ed, so thought you were the best placed to respond.

[GPS]

I am wondering if I had avoided it if I had shaded the filters from the sun coming from the side.
l...

Correct.

[Lars Daniel]

Thanks, I think it is solved then. Using the Lee filter system is also new to me (as is LF), so there are some mistakes to be made and learn from.

[Steve M Hostetter]

a fail-safe way to shade your lens while your using a tripod is to always use the darkslide to shade the lens..

[Brian Ellis]

Too many filters.

[GPS]

a fail-safe way to shade your lens while your using a tripod is to always use the darkslide to shade the lens..

Nonsense. Many photographers many times ruined their picture in doing so. It is difficult to know when your dark slide shows in the picture and when not.

[Bob Salomon]

Parts of the sky are naturally polarized, other parts are not. When you use wider angle lenses you can pick up both parts of the sky. If you use a polarizer then you will get banding in the sky from the polarized and unpolarized sky areas. The wider the lens the more banding you will get.

[GPS]

Yes, but in such a case the banding will not be as regular and geometrical as it is in the OP's case.