Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Ernst Dinkla
<edinkla@...> wrote:
>
> Roger wrote:
> 
> > 
> > The Photomatix blends are a bit mushy as I have since discovered I
> > need to lock focus between first and second scans.
> > 
> It is not just focus shift but there can be some shift of 
> the film frame too between scans. That's what makes the 
> difference between multisampling and multiscan in detail loss.

Yes, that's very true and easy to see (lay one scan over the other in
Photoshop, pin register and lower opacity and it's clear they aren't
quite lined up).

My scanner does not do single pass multisampling and Vuescan's
multipass multisampling and multiple exposure both have some alignment
issues (among other problems.) Focus shift just makes things worse.

Photomatix is fairly sophisticated when it comes to alignment (it's
quite usable for "high speed HDR"- combining three bracketed handheld
shots) and I find it deals with my scan alignment issues well enough,
too.  Worth a try to compare with your current workflow.  If you're
using a Coolscan with Vuescan also google Erik Krauss' "super advanced
workflow" for a way to use analog gain to remove the C41 mask.

Roger