> One big
> problem with the Sigma lens, though, is the fact that it is not compatible
> with the 1.4xA since the extending front element of the 1.4xA protrudes too
> far. Does anyone know of a way to fix this? What would happen if I put a
> small extension tube between the 1.4xA and the Sigma lens?
you will loose infinity focus and get a "macro" TC.
> 700mm f5.6 lens, and the 350mm with the 2xA just did not make the grade. I
> have no experience with the Zuiko 600mm, but feel it is really a bit too
> slow for my work. This novel is concluded. Thanks for reading....snore!!
May I suggest to buy an off-brand 1.4 TC? Maybe there's a Sigma for OM.
Marco
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