Issues with stitched pans (Page 2): Then a 24mm would have produced the same spread and vertical cropping would have produced the same shot without any hassle. That is what I would...

cahale Loc: San Angelo, TX

manofhg wrote:

While there are some dust issues in the form of spots that I can take care of, that wasn't causing the vignette effect. The original images were shot at 200 mm.

Then a 24mm would have produced the same spread and vertical cropping would have produced the same shot without any hassle. That is what I would have done. But you obviously are free to do it any way you want. Nice shot, by the way.

UTMike Loc: South Jordan, UT

Photoshop has a neural filter to remove jpeg artifacts that look very much like the issue you have here.

jcboy3

manofhg wrote:

I shot several pictures that I was able to stitch ... (show quote)

There are come circular patterns that are the result of dust on the sensor or on the lens. These should be fixed before merging into a panorama, using other images that don't have the dust spot in the same location.

There are a number of shadow patters that are due to lens vignetting or use of a CPL. Do not use a CPL for ultra wide angle shots or panoramas. As for vignetting, this can be mitigated by taking a lot more shots so that only the central part of the images are used. Severe vignetting should be fixed before merging, and it is best to crop the images to eliminate the worst vignetting. Which is not a problem if you have enough images.

Using an indexed rotator on a tripod is a very effective way to get a sufficient number of well spaced images. You want at least 70% overlap.

MJPerini

While there are a few dust spots in the image I can clearly see what you are talking about. It looks to me like a CPL.
Polarization only works at certain angles to the sun. It is very easy to get uneven skies with a polarizer, ESPECIALLY when sweeping multiple frames across a large angular view.
I tend not to use polarizers on Panos for that reason. I realize it would be natural to reach for a CPL for haze reduction in a scene like that, and it Looks to me like you did.
This is not usually fixable, but what I have done is do a minimal edit on each frame with an eye toward evening out the skies, then exporting each file as a 16b TIFF into a folder, Then importing those into the stitching program.
One of the ways the unevenness manifests in your picture is in the recurring patches of Pink in the sky, I would try slightly desaturating some of those in the TIFFS. It may or may not work, but good luck

Grahame Loc: Fiji

manofhg wrote:

I shot several pictures that I was able to stitch ... (show quote)

If you have LR or ACR open all your individual images in it together. Use the 'Colour Sampler' tool towards the top left and right corners at the same scene position of each to balance the difference in brightness between each caused by vignetting.

Orphoto Loc: Oregon

Vignetting, sort of. Am guessing you have optical automatic lens correction turned on in your photo editing program. Instead of applying a vignette, it is over correcting and giving you lighter corners. Then it dutifully stitches them together giving you this irregularity.

Go back and manually back off the vignette control until you have even lighting across the frame.

manofhg Loc: Knoxville, TN

Orphoto wrote:

Vignetting, sort of. Am guessing you have optical automatic lens correction turned on in your photo editing program. Instead of applying a vignette, it is over correcting and giving you lighter corners. Then it dutifully stitches them together giving you this irregularity.

Go back and manually back off the vignette control until you have even lighting across the frame.

Thanks, that's what I intend to do. I appreciate all those who commented and helped to identify the problem for future shots as well as hopefully make this shot still usable.

imagextrordinair Loc: Halden, Norway

manofhg wrote:

I shot several pictures that I was able to stitch ... (show quote)

Use all manual settings including a daytime K value for white balance. If the lighting varies between frames you can have issues.

I would just do a quick sky replacement with a similar look in PS to fix this image...

selmslie Loc: Fernandina Beach, FL, USA

manofhg wrote:

I shot several pictures that I was able to stitch ... (show quote)

You used manual exposure. However, another issue could be Auto WB which might change the WB slightly (tint, in this case) depending on which way the camera was facing for each shot.

If you captured the images raw you can set the WB to the same temperature and tint for each of the images before stitching.

selmslie Loc: Fernandina Beach, FL, USA

Rongnongno wrote:

Dust on the sensor, nothing to do with your stitching.

Also, this is the wrong section, use the Gallery or the panorama section.

Wrong, as usual.

This image would not have attracted the proper attention in the gallery.

rcarol

manofhg wrote:

I shot several pictures that I was able to stitch ... (show quote)

I can't speculate on the cause of the issue but using Photoshop or one of many other available applications, perform a sky replacement.

JFCoupe Loc: Kent, Washington

I have had a similar result if I take a series of images with my Olympus 12-100 lens at the wide angle range of the lens. I try to remember to set the lens at about 25 MM (50mm FFE) when I am going to stitich images. I also find that shooting my stitiched pano shots to put the camera in portrait position as well.

SuperflyTNT Loc: Manassas VA

cahale wrote:

Those circular patterns are dust on either your lens or your sensor. Also, while stitching yields nice results sometimes, this shot looks like it could have been made with a wide-angle lens and then cropped to produce the panorama effect.

Dust in the lens wouldn’t look like that. It’s the sensor. And maybe this could have been done with a wide angle lens and cropped, but not with the same detail you can get when stitching.

SuperflyTNT Loc: Manassas VA

Rongnongno wrote:

Dust on the sensor, nothing to do with your stitching.

Also, this is the wrong section, use the Gallery or the panorama section.

Wrong-no-go is wrong again. The gallery is just for displaying photos, not asking questions. I’m not familiar with the panorama section but his questions weren’t specific to it being a panorama. You should really consider adding a “W” to prefix your username so readers would know what to expect.

manofhg Loc: Knoxville, TN

imagextrordinair wrote:

Use all manual settings including a daytime K value for white balance. If the lighting varies between frames you can have issues.

I would just do a quick sky replacement with a similar look in PS to fix this image...

Thanks, I'll try daytime K, but while I've considered the sky replacement, (never done it before), I didn't think about searching for a sky from possibly the same area. Again, I've never attempted a sky replacement either though.