Manual exposure control?

[Joern]

Dear Silverfast,

the prescan histogram of many of my old slides shows limited maximum intensity of the raw scan data (no colour channel above 55, say). The dark areas then suffer from very bad brightness and colour resolution. Is there any possibility to make use of the full (255) range? E.g., by manually increasing the exposure time? I use Silverfast 6.6.2r3 with reflecta CrystalScan 7200. I tried Multiscan but the effect, if any, was negligible.
Thanks in advance, Joern

[LSI_Ketelhohn]

Dear Joern,

Is the film material maybe very dense?
If other images are scanned correctly the scan itself will show the correct data.

MultiSampling however does not increase dynamic range.
Only Multi-Exposure can do that.

kind regards,
Arne Ketelhohn.

[Joern]

Dear Arne, thank you. Following your information I bought and installed Silverfast 8Ai, but on starting the program it stopped immediately with error message (unnumbered) "Es gab ein Problem, den Scanner zu starten ...". Then, at reflecta I got a new driver : CVX5_Windows_5.11.65.msi . However, installation failed because of presence of another instance. I deinstalled the older Silverfast version (6....), but nothing changed. Can you please help me? Jörn

[LSI_Ketelhohn]

On a MAC please follow these instructions.

On PC please follow these.

kind regards,
Arne Ketelhohn.