lumelix wrote:Hi Robert
You can check if there is still some vignetting visible in the Images from LR.
But two Images of the upper row side by side in an Image Editor and move them one above the other.
Then you can see some differences from vignetting very easily.
The MF 85 mm should not be a Problem, but I suggest only use to f/8. With f/16, you loose sharpness because of diffraction.
Boley wrote:
Do you think that shooting at f8 would perhaps reduce some of this vignetting?
It would be a pity if I am unable to correct this problem as I really like using this lens.
Thanks for your advice.
Robert
lumelix wrote:Should not be a Problem to get this issue solved. And it is worth the effort, this lens is one of the best ever made by Nikon ( http://www.kenrockwell.com/nikon/85mm-f14.htm )!
Boley wrote:Thanks Klaus, very valuable information. I will try the lens correction in APG and then also PTGui and see how I go.
Robert
Boley wrote:Now that I have got a consensus from everyone that the problem is vignetting I know where to focus, so to speak.
mediavets wrote:Boley wrote:Thanks Klaus, very valuable information. I will try the lens correction in APG and then also PTGui and see how I go.
Robert
As I recall PTGui incorporates vignetting correction code 'borrowed' from the Hugin project.
AFAIK APP/APG do not have vignetting correction.
klausesser wrote:mediavets wrote:Boley wrote:Thanks Klaus, very valuable information. I will try the lens correction in APG and then also PTGui and see how I go.
Robert
As I recall PTGui incorporates vignetting correction code 'borrowed' from the Hugin project.
AFAIK APP/APG do not have vignetting correction.
PTGui and HugIn both are GUIs for the Panotools afaik - but PTGui /Pro is much more advanced than the free HugIn.
best, Klaus
lumelix wrote:Banding because of vignetting depends from overlapping. Seems that in this case overlapping horizontally is better than vertically to avoid vigneting issues.
I found always vignetting issues with APG even using a 600mm tele at f8, when overlapping is really small (less than 20%).
mediavets wrote:
See: http://www.ptgui.com/panotools.html
"PTGui started in 2001 as a Graphical User Interface for Panorama Tools, hence the name. Panorama Tools, originally written by Helmut Dersch, was the most versatile package for creating panoramic images at that time. ............
.........Over the years nearly all functionality of Panorama Tools has been integrated into PTGui and Panorama Tools is no longer needed to run PTGui, but the Panorama Tools optimizer and stitcher can still be used.
Also: http://www.tawbaware.com/forum2/viewtopic.php?t=4704
klausesser wrote:IF a lens produces vignetting at all - it´s on the far ends of the frame. That means: IF the long side of the frame shows vignetting, then the short side must be showing much heavier vignetting ;-)
When the camera is mounted in portrait-mode the vignetting must be visible not as vertical stripes but as horizontal stripes in that case.
best, Klaus
klausesser wrote:Well - and what´s that supposed to tell us in terms of the issue we talk about here?![]()
best, Klaus
P.S.: you see - when PTGui can deal perfectly wit the lens without banding - why would APG fail?
lumelix wrote:Yes, this is in theory
lumelix wrote:But I always shot Portrait mode, and if it occurs, always have this banding vertically, on the short (!?) side of the Images.
lumelix wrote: It's typically if you use APG with images that have vignetting.
lumelix wrote:Could be also dependend of the algorithmus of the blending engine in APG.
lumelix wrote:Perhaps, PTGui have a better solution there.
lumelix wrote:If you read destinys post about "the best stitcher", you can see that I'm not happy with the blending engine, still not also in V3.5b2.
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