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LaserWriter IIg - very low copy count
Looks and prints like brand new
Original price: $4,599
My price today: $495

GENERAL INFORMATION
The LaserWriter IIg was introduced at the Fall 1991 Seybold Conference
on 
Desktop Publishing. The printer uses the same 300 dpi Canon SX engine as
it�s predecessors the SC, NT, and NTX. The IIg was under development at
Apple for a long time and it represents a major advance in controller
technology over previous Apple models. The IIg is a major improvement
over Apple's previous top-of-the-line LaserWriter II NTX.

The IIg offesr improved print quality based on Apple's proprietary
technology called FinePrint�. FinePrint is similar to HP's Resolution
Enhancement. FinePrint is an edge enhancement scheme that only smooths
the jaggies. FinePrint does not guess when to sharpen points or inside
corners at line crossings as HP's RET does. A new LaserWriter driver
allows Mac users to turn FinePrint on or off. Fineprint operates at
print time on the 300-dpi raster data created by the PostScript
interpreter. In this way it improves print quality without degrading
print speed or significantly increasing the manufacturing cost of the
printer.

The IIg includes another new proprietary Apple technology, called
PhotoGrade� and used for printing high-quality scanned images. With
PhotoGrade, the resolution is still 300 dpi, but pixels are printed in
different sizes and in particular patterns within halftone cells, to
produce output that truly looks gray. Apple claims Photograde produces
over 65 recognizable levels of gray.

PhotoGrade improves the quality of scanned images differently than the
600-dpi resolution schemes used by DP-Tek and QMS in their 300-dpi
SX-based products. With PhotoGrade gray scale, color information from
the computer is converted into a mosaic of four-point stars made of
eight-pixel dot patterns called cells. The amount of toner deposited in
each pixel space is varied
by the amount of time the laser beam is switched on. Due to effects
caused by the interaction of neighboring pixels, the maximum theoretical
number of gray scale patterns cannot be realized on an SX engine. Of the
over 130 possible combinations of patterns and pixel intensities
possible in a four-point star (eight-pixel halftone cell), Apple
engineers have identified 67 combinations that will consistently produce
distinguishable shades of gray.

The 600-dpi improved resolution schemes of other manufacturers begin
with higher-resolution bit-map information instead of color information.
Boundaries are defined to greater precision, and smaller dots are used
to fill the grid. Special techniques are used to induce dots to fall
between
successive scan lines in order to improve vertical resolution.

Both PhotoGrade and 600-dpi resolution schemes require more RAM and
processor overhead than conventional 300-dpi resolution. The IIg
features the faster 25 MHz 68030. Both controllers can accommodate up to
32 megabytes of RAM.

The IIg also includes Adobe PostScript Level 2, which is designed to be
fully compatible with original PostScript and offers additional
capabilities and speed improvements. Another new feature is simultaneous
interface connection. The IIg features Ethernet using Apple's 15 pin
AAUI protocol, and it can
be simultaneously connected to Ethernet, LocalTalk, and RS-232. The IIg
includes HP LaserJet IIP (PCL 4+) emulation, which is an improvement
over the LaserJet Plus emulation offered by the II NTX.

The improvements incorporated in the IIg are significant. PhotoGrade
represents an important milestone in the evolution of printer
controllers for Canon engines. The EtherNet capability of the IIg allows
faster data transfer, which is especially important for scanned images.
By Apple's
standards, the introductory prices for these advanced machines were very
competitive.

-- 
======= Jim Cleary - Albuquerque, New Mexico
Refurbished - Mac computers
Apple LaserWriter and HP LaserJet printers
"http://www.flash.net/~redchile/" ========