Just to clarify, you have the 18-200mm f/3.5-5.6G ED VR II and when you shoot at the widest aperture a particular focal length allows, e.g. f/3.5 at 18mm or f/5.6 at 200mm, your shots come out approximately one-half stop underexposed. As soon as you move away from the minimum aperture for that particular focal length, your shots are all properly exposed. Is all that correct?My D5500 has a Nikon 18-200 ED2 lens and I've found a strange anomaly. When shooting at the lowest F No ie 3.8 or any other in the Zoom range then the pictures are approx. 1/2 stop underexposed. All other F no's are fine - is this a faulty lens ??
My level ofexpertise is I would say above average which I why m concerned. I havebeen in touch with Nikon UKand their excellent adviser was able to reproduce the issue with the samecombination. The 'techs' told his that this was 'within parameters and wascaused by the mechanical diaphragm being slightly longer than necessary' BUT itdoes seem to be only this lens camera combination that causes it. This isthe only lens I have unfortunately but trying it in a shop with another 18-200showed the same issue. Changing the body also made no difference. Its too late to return the lens for a different one so I seem to bestuck. P S & A modes are all the same issue which is why I am askingif anyone else has seen this problem or can make any suggestions. NikonUK HAVE offered t check out the equipment but I have been told they are likelyto be 'within tolerance' and returned without any changesJust to clarify, you have the 18-200mm f/3.5-5.6G ED VR II and when you shoot at the widest aperture a particular focal length allows, e.g. f/3.5 at 18mm or f/5.6 at 200mm, your shots come out approximately one-half stop underexposed. As soon as you move away from the minimum aperture for that particular focal length, your shots are all properly exposed. Is all that correct?
Does this happen with any other of your lenses (assuming you have some you can try)?
Put the camera Mode dial to the green "Auto" setting (full automatic); does the problem continue? If it does, I would say it's time to have a professional take a look at things.
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Sounds like you've found your answer. Not the answer I'd like but if Nikon is unwilling to correct what appears to be a known issue I'd have to say you are, in short, screwed. Half a stop of exposure can be pretty easily corrected in post-processing but beyond that it sounds to me your most realistic options boil down to: A. Live with this issue (and fix it in post if you choose to) or, B: Dump the lens and get something else.My level of expertise is I would say above average which I why m concerned. I have been in touch with Nikon UK and their excellent adviser was able to reproduce the issue with the same combination. The 'techs' told his that this was 'within parameters and was caused by the mechanical diaphragm being slightly longer than necessary' BUT it does seem to be only this lens camera combination that causes it. This is the only lens I have unfortunately but trying it in a shop with another 18-200 showed the same issue. Changing the body also made no difference. It's too late to return the lens for a different one so I seem to be stuck. P S & A modes are all the same issue which is why I am asking if anyone else has seen this problem or can make any suggestions. Nikon UK HAVE offered t check out the equipment but I have been told they are likely to be 'within tolerance' and returned without any changes