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Sigma 50-500 Bigma and Kenko Pro300 1.4X Problem ?


Letchworth, UK
109 posts

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NickR Registered since 28th Oct 2005
Fri 02-Dec-05 11:23 PM

I've just purchased a Kenko Pro300 1.4X teleconverter, I am using it with my D50 and Sigma 50-500 Bigma.

I notice that it can still AF (with some hunting), but the metering seems very unstable. For example, when I focus on something, the metering keeps jumping e.g. between 1/200 and 1/60. Some picture come out ok depending which shutter speed is used when the shot is taken. Some shots are over exposed?
I was wondering if anyone has similar problem? Or know of a workaround.

By the way the Kenko Pro300 1.4X works fine on my Nikkor 300mm F4 AFS.


Nick ,Hertfordshire, UK