D
Don
Two more observations; one serious (focusing), the other (standard
image size) more cosmetic.
Migrating from LS-30 to LS-50, all of a sudden, film curl and
therefore focusing becomes an issue! On the LS-30 everything was so
fuzzy that it didn't make a lot of difference - not that much can be
physically (and easily) done when the film is cardboard-mounted
slides. However, with the increased resolution and resolving power of
the LS-50 there is clearly a noticeable focus problem with about 20
clicks (and more!) difference between the center and the edges not at
all unusual. Sampling focus around the image and then manually setting
an (un)happy medium just doesn't seem satisfactory.
One option may be to scan more than once focusing on different parts
of the image and then merging. So just when I thought I was free of
multi-pass scanning (to fix LS-30's lack of dynamic range) I may have
to go back to it to correct the focus. :-( Although that's much easier
to do than contrast merge, it's still a major pain, especially with
file sizes of the 4000 dpi, 14-bit scanner and, most of all, increased
misalignment of multi-pass scans due to more precision.
Finally, I like to have the same image size for all scans. At 2700 ppi
on the LS-30 I settled for 3600 x 2400 pixel crop which was just
perfect. Beautiful numbers divisible by everything under the sun! This
is so I can reduce my "digital negative" cleanly by various amounts
depending on intended usage e.g. for display on a desktop monitor,
display on a PDA, etc.
The trouble with 4000 ppi is that the standard image size is now very
awkward. The beautiful 3600 x 5400 crop is just a tad too large.
Instead, the closest usable crop (for mounted Kodachrome slides, at
least) appears to be around 3500 x 5250. And those numbers are just
soooo ugly! ;o)
Yes, I know, use 3600 x 5400, reduce and then trim afterwards but
that's just yet another messy step I'm trying to avoid because the
goal is a streamlined and efficient workflow. Oh well, you can't have
everything...
Don.
image size) more cosmetic.
Migrating from LS-30 to LS-50, all of a sudden, film curl and
therefore focusing becomes an issue! On the LS-30 everything was so
fuzzy that it didn't make a lot of difference - not that much can be
physically (and easily) done when the film is cardboard-mounted
slides. However, with the increased resolution and resolving power of
the LS-50 there is clearly a noticeable focus problem with about 20
clicks (and more!) difference between the center and the edges not at
all unusual. Sampling focus around the image and then manually setting
an (un)happy medium just doesn't seem satisfactory.
One option may be to scan more than once focusing on different parts
of the image and then merging. So just when I thought I was free of
multi-pass scanning (to fix LS-30's lack of dynamic range) I may have
to go back to it to correct the focus. :-( Although that's much easier
to do than contrast merge, it's still a major pain, especially with
file sizes of the 4000 dpi, 14-bit scanner and, most of all, increased
misalignment of multi-pass scans due to more precision.
Finally, I like to have the same image size for all scans. At 2700 ppi
on the LS-30 I settled for 3600 x 2400 pixel crop which was just
perfect. Beautiful numbers divisible by everything under the sun! This
is so I can reduce my "digital negative" cleanly by various amounts
depending on intended usage e.g. for display on a desktop monitor,
display on a PDA, etc.
The trouble with 4000 ppi is that the standard image size is now very
awkward. The beautiful 3600 x 5400 crop is just a tad too large.
Instead, the closest usable crop (for mounted Kodachrome slides, at
least) appears to be around 3500 x 5250. And those numbers are just
soooo ugly! ;o)
Yes, I know, use 3600 x 5400, reduce and then trim afterwards but
that's just yet another messy step I'm trying to avoid because the
goal is a streamlined and efficient workflow. Oh well, you can't have
everything...
Don.
