# Blue Vignetting issue

**URL:** <https://forums.negativelabpro.com/t/blue-vignetting-issue/1469>\
**Category:** Troubleshooting and Bugs\
**Created:** [March 30, 2020, 8:25pm UTC](https://forums.negativelabpro.com/t/blue-vignetting-issue/1469 "2020-03-30T20:25:17Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![nate](https://yyz1.discourse-cdn.com/flex029/user_avatar/forums.negativelabpro.com/nate/32/4_2.png) [@nate](https://forums.negativelabpro.com/u/nate)\
**Post date:** [March 31, 2020, 3:12pm UTC](https://forums.negativelabpro.com/t/blue-vignetting-issue/1469/2 "2020-03-31T15:12:19Z")

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Hi,

See this thread for things to try from a setup standpoint:

> [@Orange spots/blotches/fog/casts?](https://forums.negativelabpro.com/t/orange-spots-blotches-fog-casts/598):
>
> I’m getting some weird orange spots/blotches/fog/casts on some pictures after scanning my negatives with a DSLR and a light pad. I’m scanning in a room with all other lights turned off, I’ve tried it with and without the pane of glass on top that I use to hold the negatives flat, and I have mask on top of my light pad to block out extraneous light. The negatives themselves are clean, and so is my lens, sensor, and light pad. Sometimes the scans come out clean, sometimes with the marks, and they…

Also, in this particular photo, I would try changing the “BlackClip” point (try -10 or so)… and maybe also starting with the “linear” tone profile… part of what is exacerbating the issue here is that the conversion algorithm has been quite aggressive with the black point and the contrast levels.

Cheer!  
-Nate

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