Originally Posted by
_tf_
Just to answer my own question, in case someone else stumbles on this, the wet mounting accessory for the V850 can't be used with the 4990, focusing distance of the V series is significantly greater than that of the 4990 series, so the scans are out of focus. Officially the 4990 focus distance from the flatbed glass is 1mm (in my case the optimal distance seems somewhere around 1.1-1.2mm), the wet mount accessory surface is 3.2mm above the flatbed. For the same reason wet mounting directly on the 4990 flatbed also produces suboptimal results — as someone else already mentioned, if buying one of these bargains, best to make sure the original film mounts are included.
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