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<blockquote data-quote="downunder" data-source="post: 369603" data-attributes="member: 29516">I have summed up the problem in the below message I sent to the seller asking to return the lens :&quot;I have found that it does not meter correctly in any mode - and it should do on the D7100, D700 and D300 cameras that I have tried. It is a faulty lens. For some reason, it won't allow cameras to meter correctly. To give you an idea of the dramatic change in shutter spead readings on the camera screen when viewed at the one scene and set on aperture mode - at f2.8 1/1250sec (underexposed); at f4 1/400sec (just right); at f5.6 1/80sec; at f8 1/20sec resulting in massive overexposure at F8. When I get the exposure correct it takes beautiful photos. However, the only way I get the exposure correct is to place cameras in A mode. I then check the shutter speed at F4 which appears to be where the exposure is correct in A mode, and then use a factor of 1/2 the shutter speed for each stop down from F4 eg. in the case above f5.6 1/200sec (or double for F2.8). I then have to switch the mode to manual, set my calculated shutter speed for the aperture I am using, and take the photo but that is a slow way to take a photo, even for a manual focusing lens.&quot;</blockquote>

[QUOTE="downunder, post: 369603, member: 29516"] [COLOR=#000000][FONT=arial]I have summed up the problem in the below message I sent to the seller asking to return the lens :"I have found that it does not meter correctly in any mode - and it should do on the D7100, D700 and D300 cameras that I have tried. It is a faulty lens. For some reason, it won't allow cameras to meter correctly. To give you an idea of the dramatic change in shutter spead readings on the camera screen when viewed at the one scene and set on aperture mode - at f2.8 1/1250sec (underexposed); at f4 1/400sec (just right); at f5.6 1/80sec; at f8 1/20sec resulting in massive overexposure at F8. When I get the exposure correct it takes beautiful photos. However, the only way I get the exposure correct is to place cameras in A mode. I then check the shutter speed at F4 which appears to be where the exposure is correct in A mode, and then use a factor of 1/2 the shutter speed for each stop down from F4 eg. in the case above f5.6 1/200sec (or double for F2.8). I then have to switch the mode to manual, set my calculated shutter speed for the aperture I am using, and take the photo but that is a slow way to take a photo, even for a manual focusing lens."[/FONT][/COLOR] [/QUOTE]

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