Kristoes

Quote from:
http://www.cambridgeincolour.com/tutorials/polarizing-filters.htm
"Polarizing lens cannot ordinarily be used with stitched panoramic photos".

Why not? What problems occur? I know nothing about this topic, yet really would like to use this tool with stitched panoramic photos.

I'm using a Panasonic Lumix DMC-FZ70.

Thanks

Photographer Jim Loc: Rio Vista, CA

Quick answer: The effect of the polarizer is dependent upon the angle of the sun in relation to the camera lens, with the strongest effect being when the angle is 90 degrees. When taking a panorama, the camera is panned in order to take the various over-lapping photos which will be used to make the pano. Each will therefore have a different angle in relation to the sun, and thus the filter will have a different effect in that image. Final result is usually a sky with uneven gradient ... Which usually looks bad

hammer531 Loc: Fall River , Ma

One of the problems that can occur is it may cause a slight color shift across any large amounts of sky in your panorama .

charles brown Loc: Tennesse

Given my limited knowledge and use of CPLs I would agree with the statement. The manner in which the CPL affects the photo would lead me to conclude that each image would be different and when combined have a unnatural look. Others here on UHH will be able to provide moe detailed information. Come to think of it inasmuch as the location of the sun affects the image outcome maybe it could be done but instead of taking all shots at once they might have to be taken over a span of several days. Would be a difficult challenge to say the least.

Kristoes

Really good answer, thanks so very much!

I understand the basic polarizing fundamentals, but given my awkward situation (see below), I was hoping to possibly correct the sky in postproduction. Pretty crazy idea, I know, but looking for anything other than the early/late/cloudy conditions option which is not always available.

I am helping my wife begin a new 2 year project and will need to edit vertical Raw panoramas from a Lumix DMC-FZ70 (20mm wide-angle, f2.8). Unfortunately, the subjects (huge, antique trees) will be back-lit (South facing moutaintop), hence the expected need for postproduction burning, dodging, HDR, etc. I've been told I need to underexpose (-.33?) for later recovery of shadow details. She will be using a pistol grip monopod with 90 deg. swivel for vertical panoramas.

Kristoes

Yes, I agree. I was wondering if the software in the camera's "stitch" program would even recognize photos and be able to function at all?

Kristoes

Wow! Really thinking out of the box! Pretty cool concept for an experiment with a really good, set tripod. Won't solve my problem, but neat idea!

nedell Loc: Holland NY USA

1st: use a tripod and not a monopod if possible.
2nd: If you use HDR you may be able to manage the project without a CPL. Using HDR would also solve the under/over exposure question.