Discussion Forum: fade dark ring problem with sigma 8mm.

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Topic: fade dark ring problem with sigma 8mm.

Message posted by atomicmak on February-21-2006 at 2:39am

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Standard Member

India
November-19-2005
54 Posts

Nikon Capture software is the best i've found to convert raw to tiff file but it has one limitation of removing that dark ring vignette from raw file which photoshop has the facility to remove.

other than every option is really good in Nikon Capture 4.3

can anyone have worked on that part in Nikon Capture to remove that vignett?

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mak
www.vox360.in

Message posted by smooth on February-21-2006 at 7:24am

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Australia
November-23-2002
5401 Posts

You don't need to remove it. It is not used in the stitch and doesn't show in the final panorama because of the amount of overlap.

Regards, Smooth

Message posted by atomicmak on February-21-2006 at 1:30pm

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India
November-19-2005
54 Posts

it make some darker spot on bottom as i use 4+T at some pano and 4 only for some.

if not used top/bottom it make dark cross on top and bottom.

anyway i right now use photoshop but would wish to use nikon capture to have it godd image quality enhancement with more controls if just ring problem can solve.

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Regards
mak
www.vox360.in

Message posted by smooth on February-22-2006 at 12:35am

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Australia
November-23-2002
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Typically the areas you speak of we simply use the Healing and Cloning tools in Photoshop to rectify.

Regards, Smooth

Message posted by Thomas on February-23-2006 at 4:06am

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Gold Member

May-18-2002
157 Posts

I use PTLens from epaperpress.com to correct the images of the Sigma 8mm. Conversion of my raw files is done with CaptureOne or with RawShooter.

Thomas

Message posted by Electrick on February-23-2006 at 4:01pm

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United States
February-21-2006
2 Posts

I have had this problem using other software but I think the fix will be the same. I usually shoot in raw with my canon, and then use the "apply camera raw settings". In the advanced mode you will see a lens tab. Go in ther and set your vignetting midpoint and amount. I am using +70 amount and 30 as the mid point. This works well to my eye but I have seen some advice to set the amount to 100 and midpoint to 0. You'll have to experiment to see what works for you.

Hope that helps.

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