Hi Dick,
A tailor make adapter ring is required for joining the Lx-5 and the DCA, otherwise, by using the original adapter ring, serious vignetting happens through out the zoom range.
With the calculated adapter ring, vignetting will only happens at the two extreme ends, say when coming around 24mm (5.1mm) and 90mm (19.2mm). Very sharp in overall.
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Last edited by cwchan at 18/09/2010 08:54 ]