Dealing with Vignetting

[Cessna954]

I've had a number of images rejected recently on the grounds of Vignetting. This may because I've changed to a full frame camera, as opposed to a 1.6 crop, so a great deal more of the lens area is being used in the image. The camera lens mix is a Canon 5DS R and 200-400 with the built in 1.4TC. When importing images through Lightroom I always apply the lens correction profile for vignetting and distortion.

I'll be honest and accept I don't have the greatest eyesight these days, which probably explains why I can't see vignetting in the following example that caused it to be rejected:

https://www.jetphotos.com/viewqueued_b.php?id=6525736

As I can't see the Vignetting I'm having difficulty in determining how I can go about with a manual adjustment that meets with JP requirements.

Is there a way of accentuating Vignetting in Lightroon or PS, as we do with dust spots, so that we can deal with it?

All help gratefully received.

Neil

[guy691]

I have trouble seeing vignetting too looking at the raw photo. I think the screeners check using the dust checker, which equalizes the photo and makes differences in colors more clear.

The way I usually do it in GIMP is to equalize the photo (Image>Auto>Equalize) to see roughly where it needs to be edited, then undo and use the burn tool (black spheres icon) set on dodge/midtones mode to brighten those areas.

While shooting I've also found it helps to increase the aperture by a few steps, since it blocks out sections of light that might be cut off by the edges of the lens.

I hope this helps, happy spotting!

[dlowwa]

I've had a number of images rejected recently on the grounds of Vignetting. This may because I've changed to a full frame camera, as opposed to a 1.6 crop, so a great deal more of the lens area is being used in the image. The camera lens mix is a Canon 5DS R and 200-400 with the built in 1.4TC. When importing images through Lightroom I always apply the lens correction profile for vignetting and distortion.

I'll be honest and accept I don't have the greatest eyesight these days, which probably explains why I can't see vignetting in the following example that caused it to be rejected:

https://www.jetphotos.com/viewqueued_b.php?id=6525736

As I can't see the Vignetting I'm having difficulty in determining how I can go about with a manual adjustment that meets with JP requirements.

Is there a way of accentuating Vignetting in Lightroon or PS, as we do with dust spots, so that we can deal with it?

All help gratefully received.

Neil

If you're shooting with a full-frame, you'll almost certainly need to stop down the aperture to avoid vignetting, especially with any kind of TC. The edges & corners are noticeably darker on the right side of your image. You might not notice it easily in your own, but trust me, when you see 400-500 images a day, it's pretty easy to spot. It's even noticeable in the thumbnail, so there isn't really any need to use special software to find it.

Best thing would be to avoid it in the first place by stopping down, like I said, but you can try post-processing techniques to remove it. I generally try to avoid those myself, however, as they tend to introduce other unwanted elements into the image like banding or compression in the sky.

I have trouble seeing vignetting too looking at the raw photo. I think the screeners check using the dust checker, which equalizes the photo and makes differences in colors more clear.

The equalizing tool is NOT used to check for vignetting.

[777MAN]

I've had a number of images rejected recently on the grounds of Vignetting. This may because I've changed to a full frame camera, as opposed to a 1.6 crop, so a great deal more of the lens area is being used in the image. The camera lens mix is a Canon 5DS R and 200-400 with the built in 1.4TC. When importing images through Lightroom I always apply the lens correction profile for vignetting and distortion.

I'll be honest and accept I don't have the greatest eyesight these days, which probably explains why I can't see vignetting in the following example that caused it to be rejected:

https://www.jetphotos.com/viewqueued_b.php?id=6525736

As I can't see the Vignetting I'm having difficulty in determining how I can go about with a manual adjustment that meets with JP requirements.

Is there a way of accentuating Vignetting in Lightroon or PS, as we do with dust spots, so that we can deal with it?

All help gratefully received.

Neil

hi, I shoot Canon FF and went through a similar issue there’s an interesting explanation here: https://www.lenstip.com/439.8-Lens_r...ignetting.html

I pretty much echo what Dana says about stopping down - f8-11 is the sweet spot. I also find it can be emphasised with a bright object (plane) in the centre, almost gives a halo effect going out from the centre with the dark corners
T

[marc1201]

I've had a number of images rejected recently on the grounds of Vignetting. This may because I've changed to a full frame camera, as opposed to a 1.6 crop, so a great deal more of the lens area is being used in the image. The camera lens mix is a Canon 5DS R and 200-400 with the built in 1.4TC. When importing images through Lightroom I always apply the lens correction profile for vignetting and distortion.

I'll be honest and accept I don't have the greatest eyesight these days, which probably explains why I can't see vignetting in the following example that caused it to be rejected:

https://www.jetphotos.com/viewqueued_b.php?id=6525736

As I can't see the Vignetting I'm having difficulty in determining how I can go about with a manual adjustment that meets with JP requirements.

Is there a way of accentuating Vignetting in Lightroon or PS, as we do with dust spots, so that we can deal with it?

All help gratefully received.

Neil

Neil,
if you shoot in raw, you need to select the right lens profile in adobe camera raw for your lens. Doesn't fix it completely, but the vignetting is much less then.
If you don't shoot raw, i recommend to do so.

The example is in dutch, but you'll understand

Marc

[Peter Lund]

I got the same problem at times.
The picture below was rejected and only if I equalize I can see it, but only on the left.
https://www.jetphotos.com/viewqueued_b.php?id=6512389

I use a full frame camera aswell (Nikon D800) and PS has a linse correction profile for the linse I am using, but still.