What is vignetting?

[hamlet]

Hi everyone,

I want to discuss vignetting today. What is it and how much of an effect does it have on your overall picture quality even when you remove it in post? Does the corrected part that had vignetting have lesser quality than the parts that didn't?

 

[texkam]

Vignetting - Wikipedia, the free encyclopedia

BTW, this is the first of many results under Google.

 

[tirediron]

A vignette is simply a shaped crop. Are you referring to lens vignetting, that is when the FoV of the lens is cropped by a lens hood/filter, or one which is added in post?

 

[amolitor]

The OP suggests that the topic is vignetting introduced by the lens.

The vignetted parts will be underexposed, so correcting that in post will probably add noise, as a general rule of thumb. You could fool around, and expose to the right to minimize the damage.

A lens with vignetting is probably less well corrected in other ways out there. You're probably using the lens outside of its designer's intent, so there's no telling what's going on out there. It might be excellent apart from the vignette, it might be terrible in a dozen ways. Each lens design will be different.

 

[Big Mike]

Vignetting is a darkening of the outer parts of an image. It occurs naturally with most lenses, so the centre of a photo will often be a little bit brighter than the edges. One of the challenges of lens design, is reducing vignetting and trying to get an image that is consistent corner to corner. Also, in-camera processing and raw processing software will often have some vignette compensation...also with the idea that they want to make the exposure even across as much of the image as possible.

Other instances of vignetting are when something gets into the path of light in front of the lens. For example, thick or multiple stacked filters screwed onto the front of the lens, or a lens hood that is too small or improperly installed.


Now, with all that being said, I actually add a vignette to most of my photos, intentionally. A darkening (or just contrasting) of the edges of an image, can serve to help keep the viewer's eye in the frame. The longer a viewer's eye stays in the frame, the easier it is for them to really look at the image. You might say that is makes the image more interesting, in a way.

Sometimes I try to make it very subtle, so that nobody would really notice it (without seeing a before and after) but sometimes I lay it on really thick and it's very apparent...just depends on the image and what I'm trying to do with it.

 

[hamlet]

The OP suggests that the topic is vignetting introduced by the lens.

The vignetted parts will be underexposed, so correcting that in post will probably add noise, as a general rule of thumb. You could fool around, and expose to the right to minimize the damage.

A lens with vignetting is probably less well corrected in other ways out there. You're probably using the lens outside of its designer's intent, so there's no telling what's going on out there. It might be excellent apart from the vignette, it might be terrible in a dozen ways. Each lens design will be different.

Thank you, i was referring indeed to the lenses vignetting. So when corrected in post it will be of a lesser quality.

 

[Braineack]

STOP.

 

[amolitor]

GO.

 

[astroNikon]

For vinaigrette
simply mix In a medium glass mixing bowl : combine oregano, thyme, oil, vinegar, salt and pepper. Mix together and pour mixture into a bottle. Then pour liberally over your salad.

OOh vignetting

never mind :blushing:

 

[astroNikon]

my 18-105 lens with the OEM hood has very slight vignetting at 105 from the lens hood. None without it.

So it can get introduced by a variety of means.
3rd party len hoods also cause alot of it.

 

[bratkinson]

my 18-105 lens with the OEM hood has very slight vignetting at 105 from the lens hood. None without it.

At 105??? That seems odd to me. I'd expect a too-long or just plain 'wrong' lens hood to vignette at the wide end (18) where the field of view (aka: angle of view) is at its widest.

 

[480sparky]

At 105??? That seems odd to me. I'd expect a too-long or just plain 'wrong' lens hood to vignette at the wide end (18) where the field of view (aka: angle of view) is at its widest.

A lens will have vignetting even with no hood or filter attached.

But there's something seriously wrong with a 18-105 that vignettes a hood at the long end.

 

[ronlane]

Hi everyone,

I want to discuss vignetting today. What is it and how much of an effect does it have on your overall picture quality even when you remove it in post? Does the corrected part that had vignetting have lesser quality than the parts that didn't?

Wouldn't have any overall effect on my picture. If I knew that I was getting it, I would leave room for it when composing the shot and then crop it out in post. If that is not possible, I would enhance it in post to make sure that it looked like I did it on purpose. (I would probably look at getting another lens that didn't do it.)

 

[astroNikon]

my 18-105 lens with the OEM hood has very slight vignetting at 105 from the lens hood. None without it.

At 105??? That seems odd to me. I'd expect a too-long or just plain 'wrong' lens hood to vignette at the wide end (18) where the field of view (aka: angle of view) is at its widest.

I'd have to double check but I think that is what was happening. Makes no sense as you said it should, if anything, occur at 18.

either way, I use my 80-200/2.8 for sport shots now.


maybe I accidentally poured some vinaigrette on my 18-105 ...

 

[Joves]

my 18-105 lens with the OEM hood has very slight vignetting at 105 from the lens hood. None without it.

At 105??? That seems odd to me. I'd expect a too-long or just plain 'wrong' lens hood to vignette at the wide end (18) where the field of view (aka: angle of view) is at its widest.

I'd have to double check but I think that is what was happening. Makes no sense as you said it should, if anything, occur at 18.

either way, I use my 80-200/2.8 for sport shots now.


maybe I accidentally poured some vinaigrette on my 18-105 ...

Or you were having a veganette moment when you posted that.