Vignette with 24-120

Skwaz

Senior Member
Below is 7 shots with this lens at , 24 , 28 , 34 , 50 , 70 , 85 and 120 , of a grey sky , if exif doesn’t show all at f4 1/500 +33ev aper priority matrix metering , no lens hood no filters , question what causes this vignette , seems to be bad at 70, 85 4C877E47-8C33-44BD-BBDB-FF916105D192.jpeg

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C9F4B38C-017B-4727-846E-E0B93771120C.jpeg

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Horoscope Fish

Senior Member
Below is 7 shots with this lens at , 24 , 28 , 34 , 50 , 70 , 85 and 120 , of a grey sky , if exif doesn’t show all at f4 1/500 +33ev aper priority matrix metering , no lens hood no filters , question what causes this vignette , seems to be bad at 70, 85
It's common for lenses vignette to one degree or another. A lens correction profile in Lr or Camera Raw should remove it, in part or in full. There are also manual controls for removing lens vignette if the profile is not fully up to the task.
 

TwistedThrottle

Senior Member
Theres's vignette control in most cameras, too. What causes it? 24-70 is a difficult lens to make, 24-120 is that much more difficult especially in fast glass. Lenses that stick to either wide or telephoto are more consistent. Lenses that go pretty wide to pretty long have to make compromises. The trade off would be to carry 2 lenses instead of 1 or bump the aperture a stop or 2. At least with vignette, its easily fixed either in camera or in post.
 

BackdoorArts

Senior Member
As stated there's vignette control in your camera, but it is only applied to JPEGs and the preview, but not the Raw file. For that you need to, as also stated, apply the vignetting correction available in Camera Raw/Lightroom. The 24-120mm is a great bang for the buck lens, but with every budget/"kit" lens you're going to find something that needs to be overcome. I've got one and it practically lives on my D750. I don't remember ever seeing vignetting like that, but since early on I've applied the lens correction as a part of the Lightroom import, so if it exists on my copy then it's largely overcome by the profile corrections applied (it corrects distortion and chromatic aberration as well).
 

STM

Senior Member
It is not at all unusual for lenses to vignette wide open. It almost always improves with stopping down.
 

BF Hammer

Senior Member
It is actually pretty common for lenses to vignette at the widest apertures. And as previously stated, it improves when you stop down normally. Have you tried checking for the soft corners at f/4 in the 70mm-85mm range that Imaging Resources found? Really all lenses have compromise in their engineering to some degree.

https://www.imaging-resource.com/lenses/nikon/24-120mm-f4g-ed-vr-af-s-nikkor/review/

At 70mm and above we begin to note some issues with sharpness. In particular, corner softness is fairly high when used at ƒ/4 from 70-120mm; a small patch of central sharpness, surrounded by 3-4 blur units of corner softness. It's worst at 85mm, where the corner softness is in the range of 5-6 blur units. However, stopping down to by just one stop to ƒ/5.6 almost completely cures this problem, and we note the same excellent performance of the wide- and mid-range angles. Fully zoomed-in performance (120mm) is actually a bit better than that found at 70 and 85mm.

With the lens mounted on the full-frame D3x, corner issues are much more problematic; what was excellent on subframe becomes merely good on full, and what was mediocre becomes quite poor indeed.

Specifically, wide-angle and mid-range performance is still fairly good, but in this case optimal performance is no longer found at the lens' widest aperture settings, as corner softness is now a factor. Stopping down reins in the corner softness, and so the recommendation here for optimal sharpness is to stick to ƒ/5.6, where we see between 1-2 blur units across the frame.

 
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