Black corners on photos???

Did a wedding yesterday.....and in the middle of the outdoor ceremony I started to get black corners on my pics I though something may have been on the front of my lens, checked..nothing and had to keep shooting. It seemed to go away on its own.

Next started shooting formal shots and noticed it again....quietly told my assistant to do the shooting that I was having some probs. My assistant told me she had also just started having the same issue.!!!!

Realized all be it a bit late that it was the lens hoods . We both took them off and had no more trouble.

What I dont understand is why??? I have done several wedding and never had this problem before...the only time I have had issue is if I have tried to get some acute angled shot. I keep the hoods on all the time.

On reveiwing my shots I noticed it was only on the wider angle shots 17mm-30 mm.

I am at a loss........both of us to have the same issue.

Any input as to why this may happen would be greatly appreciated..

ps...mine was the 17-55 with the petal shaped hood. My assistant was using the 17-85 with petal hood.

Are you using Canon hoods or aftermarket?

Canon hoods.

The only thing I could think of is that you were getting vignetting because you were using an aftermarket hood. If you're using the correct Canon hood (the one specifically made for the lens you're using), then as far as I know, vignetting should not occur. Have you double-checked to see that the hood you're using is the correct part number for the specific lens?

Yes it is.......as I have said above I am really at a loss to explain this. I have never had this happen before. It was opposite corners that were affected...before I twigged it was the hood I had to shoot .....to crop.

We had exactly the same issue with genuine Canon hoods when we had 17-55 f2.8 IS and 24-105 f4 IS ...seems it was all too easy to knock them without realising (especially on a busy dancefloor) and have them turn enough to appear in picture. Maybe there's a wide manufacturing tolerance of fit and some copies move easier than others?

No use for Canon but I really like the hood on our Nikon 24-70 f2.8 because it clicks securely into place and you have to push a button to release it.

Rob

RobKirkwood wrote in post #8758066
We had exactly the same issue with genuine Canon hoods when we had 17-55 f2.8 IS and 24-105 f4 IS ...seems it was all too easy to knock them without realising (especially on a busy dancefloor) and have them turn enough to appear in picture. Maybe there's a wide manufacturing tolerance of fit and some copies move easier than others?

No use for Canon but I really like the hood on our Nikon 24-70 f2.8 because it clicks securely into place and you have to push a button to release it.

Rob

Yes... if you are using genuine Canon hoods, they shouldn't show up in the field of view. My guess is that they somehow got twisted.

Some hoods are a better fit than others, some work loose over time through use.

When I shot crop bodies the hood on my 10-22 wasn't particularly tight and all it took was a little knock for it to turn slightly and show up in shots.

I lost the genuine Canon hood from my 24-70 lens and thought I would try a cheapo option but deffo wont do that again, its flexible and doesn't click into place very securely so it doesn't get used.. hoods are good for protecting the lens and against flare but also very useful in wet and windy conditions to keep water off the front of the lens.

When hoods get knocked or twisted you can see them in the corners of the image. Make sure the hood's fitted properly and clicked into place and you won't see them any more. It's happened to me a few times.

Thanks everyone....I hope the fix is as as simple as a loose hood, it had me worried.
Maybe just a coincidence that my assistants came loose as well.

It was an extremely physically demanding wedding. The bride and bridesmaid arrived on horses. We were literally running to keep up with the horses....And I am no spring chicken. This jarring may have worked the hoods loose without us knowing.
cheers Val

Try using some black masking tape to secure the hoods in place...the tape shouldn't leave residue on the lens barrels, but will give you tons of peace of mind.

Nice tip....thanks Tim

Another way to make the hood more secure is to heat it up, just enough to make it slightly pliable, then squeeze it so that it's just a tiny bit out-of-round.
If you have done it right, it should fit much tighter on the lens. If you haven't done it right...it might not fit at all.

Were you using any filters? Perhaps you might have been getting some vignetting due to those, if applicable.

using a polarizer on top of a UV and it happens all the time... so I'm sure the hood got twisted on them both.