Gar Luc 6:39pm, 5 May 2008
Hey everyone,

Just found this group and figured I would ask a simple question for some help.

In this picture below the corners are much darker than the rest of the photograph. My shutter speed was 1/1000 when I took it and I might thing that has something to do with it but I am not sure; perhaps it's metering? Your advice is very much appreciated.

Heron
MOD
Surely Not 10 years ago
unfortunately (or fortunately if you like it!) there's not much you can do about this. It's called vignetting and happens at wider angles - sometimes you can improve it by using a smaller f-stop, or just photoshopping it out...
Gar Luc 10 years ago
Ok thanks for the response. Yeah guess there wasn't much I could do since the F was all the way down at the time. Thanks again.
gigantic rock [deleted] 10 years ago
Hmm. You shot it at 5.6@1/1000 so it shouldn't have been a wide enough aperture to cause vignetting like this. Did you have a lens hood on?
MOD
Surely Not 10 years ago
i find if i use a circular poloriser on the 18-135 i get BAD vignetting at wide angles (although that's prob just me not using the filter correctly...)
secondcareer PRO 10 years ago
This particular shot is telephoto, not wide angle, according to the exif (300mm equivalent on 35mm). Looking through your other shots I see the same vignetting, but it's not pronounced because the backgrounds are not uniform as in this one. It's the lens. I'd blame it on cheap glass, but I could be very wrong. What are you shooting with?
MOD
I think it is a combination of speed and light source. It looks to be a very intense light situation, yet the ISO for this shot is 400. There is a lot of noise in the image if you look at the original size. With a 1/1000th shutter at f5.6 and ISO of 400, I think that combined with a possibly lower end piece of glass all combined together to create the vignetting. As secondcareer stated above, because this is common throughout other images in your photostream, it is a good suspicion that this is a low cost telephoto lens. With a very intense light source, it is not getting an even distribution of light and it is more pronounced in this image because of the common color throughout the background.
The exposure bias is 2/3. Is that intentional?
MOD
I believe that the camera is auto adjusting due to the metering mode being in pattern and the high contrast between the subject and the background. The camera is changing the aperture or the shutter speed to adjust for this divergent lighting situation. Exposure bias is usually measured in thirds.
Gar Luc Posted 10 years ago. Edited by Gar Luc (member) 10 years ago
Hey again

I'm using a 55-200 Nikon lens, here's the link to it www.amazon.com/Nikon-55-200mm-4-5-6G-AF-S-Nikkor/dp/B000O...
I was using a lens hood while taking this picture, I was standing some what in the shade and the bird was in the clear day light. I always use the lens hood, I'm going to assume that I should have taken the hood off since I was standing in the shade. The exposure adjustment was not on my part but was from the camera I would assume since I left the EV in the center at 0.
I'm going to leave my ISO setting on auto from now to see if that will help out. I do plan on getting a new lens within a few months once I have it in my budget but a question that I want to ask is how I can improve my shots with my current lens? Basically, what am I doing wrong as far as settings are concerned?
I just got into photography a few months ago and I love it, but I would very much love to improve and learn from mistakes but would love for someone to offer me advice on how I can change my faults.

Edit: I also just realized this happens mainly when I zoom all the way down, I guess my lens that I thought was good is crap :(

Thank you all for your responses!
MOD
raddad! aka Randy Knauf PRO Posted 10 years ago. Edited by raddad! aka Randy Knauf (moderator) 10 years ago
Gary, the type of advise you are asking for can only be done on an individual photo basis. Even then you will get a dozen different recommendations from as many people. There are two things I recommend you do. The first and what I consider the most important, shoot a lot of photos. Take your camera with you everywhere. Try the different settings on your camera and look at the results. Learn from your mistakes. Even consider taking a notebook and writing down notes for each shot to re-enforce what you learn. In the first year that I had my first dslr, I shot over 10,000 photos and I'm still learning. The second thing is to look to your community college or Adult Education programs for photography classes. If none are available, there are several online classes available, but I have never taken any of those, so I cannot directly recommend a particular class.

Good luck and have fun taking photos!
Gar Luc 10 years ago
Gotcha thanks again for the help and suggestions. I have been meaning to take a photograph class but haven't got around to that just yet. Thanks again and take care everyone.
darren_crabb 10 years ago
Gary, regarding your comment about taking the lens hood off ... a lens hood (presuming it's the right one for the lens) should not affect the picture at all as it's merely a shade that is out of the picture, I certainly wouldn't expect it to create the vignette that you are seeing on your picture, unless it was the wrong type for the lens or not fitted properly. The only time when a lens hood becomes a waste of time is when you are shooting directly at the sun and it's in the picture .... not much a hood can do about that!

Personally, I'd put it down to the glass you're are using and the lens you have is very much in the consumer price bracket, and I wouldn't expect too much in the way of lens correction. I'm a Canon user so I'm not familiar with the Nikon lenses, but from experience I got a 90-300mm consumer lens with my camera when I bought it, and I thought it was great .... until I bought a 70-200mm L series lens which makes me understand what the difference in optical quality means. I can still take great pictures with the 90-300mm but it doesn't handle the tricky light situations so well and tends to give less contrast. On the other hand I can still take crap shots with the 70-200mm down to bad technique! I recommend borrowing or hiring a different lens and see if you still get the problem.
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