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Review title: Not for D5100....
Product review: The fit and threading is okay. However, when you place this on a D5100 (or 5000) you are likely to get a "lens not attached" message. You can use the camera in "manual" mode, but them you will have to set aperture, iso, etc. manually. If you want to be able to use this with a lens, but have the camera automatically set aperture, iso, etc., it won't work - since the camera does not recognize that a lens is attached and there is no way I know of to bypass that.
