Scanning Large Format

[r_hofland]

The idea is to scan for either end of the OD range of the film (about 4 total) and then interpolate the extremes into the final image. I don't see why this can't be done in digital imagery using a computer program to sample a series of bits from nearly identical scans (just different tonal depths and then filtering out the artifacts). I suspect it would take a fair amount of time and thus not be worth it for most images, but for the few of great interest or value, why not?

[r_hofland]

Says: Troy Ammons , mar 12, 2005; 04:22 p.m.

the 10000 has an optical resolution of 600 dpi.

 

FYI-- Epson states:

 

Epson Expression 10000XL- Photo

$3,199.99

 

* 2400 x 4800 dpi

* 3.8 Dmax, Transparency Unit

* Hi-Speed USB 2.0, FireWire? (IEEE 1394)

 

The stated resolution is hardware since I find this on the specs page:

 

 

 

 

E10000XL-PH

Our Price: $3,199.99*

Product In Stock

 

 

 

Product Information

Overview

Features & Benefits

Specifications

What's in the Box?

Software

Accessories

Warranty

Technical Support

 

Buy Now

 

Where to Buy

 

 

Specifications

 

Scanner Type

 

* Flatbed color image scanner

 

Photoelectric Device

 

* Color Epson MatrixCCD? line sensor

 

Optical Resolution

 

* 2400 dpi

 

Hardware Resolution

 

* 2400 x 4800 dpi with Micro Step Drive? technology

 

Maximum Resolution

 

* 12,800 x 12,800 dpi with software interpolation

 

Effective Pixels

 

* 87,840 pixels/line (2400 dpi)

 

Color Hardware Bit Depth

 

* 48-bits per pixel internal, 48-bits per pixel external (External bit depth is selectable to 48 bits depending on the image editing software.)

 

Grayscale Hardware Bit Depth

 

* 16-bits per pixel internal, 16-bits per pixel external (External bit depth is selectable to 16 bits depending on the image editing software.)

 

Optical Density

 

* 3.8 Dmax

 

Scaling (Zoom)

 

* 50% to 200% (1% increments)

 

Brightness

 

* 7 levels

 

Focus Control

 

* AutoFocus optics system (CCD and lens unit)

 

 

 

 

I DON'T KNOW HOW ITS IMAGE QUALITY WILL COMPARE TO THE NEW Perfection 4990 WHICH STILL IS NOT LISTED ON THE U.S. WEBSITE. I believe the 4990's resolution will be the same as the 4870-- 4800x9600:

 

Scanner Type

 

* Flatbed color image scanner with Digital ICE? technology for Film and Photo Prints

 

Photoelectric Device

 

* Color Epson MatrixCCD? line sensor

 

Optical Resolution

 

* 4800 dpi

 

Hardware Resolution

 

* 4800 x 9600 dpi with Micro Step Drive? technology

 

Maximum Resolution

 

* 12800 x 12800 dpi with software interpolation

 

Effective Pixels

 

* 40,800 x 51,600 (4800 dpi)

 

Color Hardware Bit Depth

 

* 48-bits per pixel internal, 48-bits per pixel external (External bit depth is selectable to 48 bits depending on the image editing software.)

 

Grayscale Hardware Bit Depth

 

* 16-bits per pixel internal, 16-bits per pixel external (External bit depth is selectable to 16 bits depending on the image editing software.)

 

Optical Density

 

* 3.8 Dmax

[r_hofland]

Epson 4990 now at B&H! Dynamic Range= 4.0 Dmax

 

http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=371657&is=REG

[michael_briggs2]

Don't take the manufacturer's specs for resolution and dynamic range as gospel truth. The manufacturers are notorious for being "optimistic" with these numbers.

[michael_chmilar]

There are (in order):

<OL>

<LI>Lies.

<LI>Damned Lies.

<LI>(Consumer level) Flatbed scanner specs.

</OL>

[kelly_flanigan1]

When I got our one and a half thousand dollar 600 and 1200 dpi class professional flatbeds about a decade ago; conventional thought was that flatbeds would peak at a real 1200 ppi in resolution; when compared to high end drum scan. Today my "amateur" Epson 2450 and 3200 scanners better this barrier; but not by much. The decade old "scanner" seminar I attended seemed to give a decent guess on the future; and warned of specs that are bloated; and add little real resolution.