Vignetting Not Allowed Query

[pshaun714]

Good morning,

I'm bringing up a topic that I'm sure has been discussed at length, and I apologise if it feels repetitive. I'm finding that many of my Jetphotos rejections are due to "Vignetting not Allowed." I want to be clear that I never intentionally add vignetting to my photos. I understand that using a wide aperture can cause this, and stopping down the aperture is the typical solution.

I rarely shoot wider than f/8, which I wouldn't consider a particularly wide aperture. This effect seems most prevalent when shooting at 400mm with my Canon EF 100-400mm f/4.5-5.6L IS II USM on my 5D Mark IV full-frame body (I don't experience this on crop sensor cameras).

Referring to the Upload Guidelines (https://www.jetphotos.com/uploadguidelines/), the sample image provided under section 4.6 Vignette clearly shows significant vignetting, making the rejection understandable. However, I'm struggling to understand rejections for vignetting that isn't visible to the naked eye, but only mildly apparent when using Jetphotos' powerful "Check for Dust" tool. The vignetting/dark corners isn't even noticeable using the equalize function in Photoshop. The fact that it's visible in the "Check for dust" tool results in a rejection that I find frustrating.

Here's an example: https://www.jetphotos.com/viewqueued_b.php?id=12420544. This photo was rejected for both softness (which I can see and agree with to some extent) and vignetting. Perhaps I'm missing something, but is the vignetting truly noticeable without this "Check for Dust" tool?

I'm interested in hearing from others who have encountered this issue. Have you successfully tackled it by consistently stopping down to f/10-f/13? Please note, I do make use of Photoshop's Lens Correction which helps with the situation on many occasions, but on other cases the vignetting might be to difficult to correct.

I'm particularly eager to hear from Jetphotos screeners/moderators on this topic. Is it possible to appeal a rejection if the vignetting is only visible through the "Check for Dust" tool?

Rant over, thank you for your time and insights.

Kind regards,
Shaun

[jakerepp]

Honestly yeah, I can see the darker corners of the frame. It is pretty subtle, though, and fair to question if it's worth rejecting over, but it's easier to reject any amount of vignetting than to have arbitrary standards of 'severity'.

I, of course, am not a screener.

[Alex - Spot-This !]

Hi,
The dark top corners are really a bit too visible unequalized so the rejection is valid.
As general tips, try not to go under F8 on a sunny day, and if your lens has a tendency to show too much vignetting, you might want to give more space around the ac when shooting so the vignetting is gone when reframing the shot on editing.
Finally, the remove vignetting tools on Camera RAW are pretty spot on if used carefully and you might want to play a bit with it if you need to save an image

Regards
Alex