Macro Mode
The camera's Macro Mode, the high-quality Ricoh lens, and the sensitive
CCD camera work together to help you clearly focus on objects as close
as 8 cm (a minimum surface area of 30mm by 22.5mm) without using a
close-up adapter. You enjoy the same crisp level of definition that
you capture with regular-distance shots.
2x Digital Zoom
Push your photography further with the RDC-4200's 2x digital zoom feature.
The camera digitally enlarges the image in the center 1/4 of the normal
SXGA image to full screen size. The enlarged image is captured in the
VGA (640 x 480 pixel) mode. And the expanded flexibility of the digital
zoom means that, when used along with the camera's 3x optical zoom,
you can get up to 6x zoom performance equivalent to using a 210mm lens!
 Interval
Shooting
Ricoh allows photographers to explore the flexibility and unique results
of interval photography with the RDC-4200's interval timer. Time becomes
your ally as you document the movements of your subject in action; from
the first stirrings of a morning flower to the last rays of the setting
sun. Capture images over a 3-hour period, spaced anywhere from 30 seconds
to 3 hours apart.
Text Mode
The Text Mode of the RDC-4200 is designed to takepictures of text that
maintain high standards of legibility, even if images are later compressed.
It raises the contrast and makes full use of the camera's high resolution
so that pictures of text stand out. It's perfect for capturing a digital
copy of an important document.
High-quality Ricoh Optics
  The high quality of the RDC-4200 begins with the Ricoh
zoom lens assembly, consisting of 9 glass elements in 9
groups, including 2 aspherical lenses. Excellent distortion
correction performance makes it possible to achieve extremely
fine 200 line/mm resolution for crisp, colorful photographs.
What's more, a multistep focusing process delivers precise
subject capture. Your photographs are clean and clear.
Ricoh-developed Algorithm Technology
Capturing good images digitally doesn't stop with a quality Ricoh lens;
advanced analog-digital conversion techniques are required as well.
Years of experience with digital cameras have helped Ricoh to develop
an A-D conversion algorithm that takes a subject's analog image information
and constructs a digital picture from it with colors that faithfully
reproduce the source. The algorithm works by comparing a single CCD
pixel's color value with the color values of the surrounding pixels.
With this broader range of information available, more accurate color
values can be assigned across the entire image.
This brand-new technology also allows users to downsample images more
accurately than ever before possible. The technique downsamples 1280
x 960 pixelimages to 640 x 480 pixel images by analyzing the color values
of a group of four pixels, and then calculates the most appropriate color
when it compresses the four into one pixel. The compressed image maintains
sharp edges and high color contrast--detail that can be lost with other
compression techniques.
Professional Imaging Quality
The RDC-4200 offers three different JPEG compression ratios for each
of the camera's two resolution modes, as well as one non-compressed
option. Whether you choose the professional-quality (1280 x 960-pixel)
mode or the VGA (640 x 480-pixel) mode, you're free to capture exactly
the level of quality you need. What's more, you can apply Ricoh's new
compression algorithm to downsample a 1280 x 980-pixel image to VGA
format at 640 x 480 pixels while preserving precise image quality.
The pictures that you take look their best--even when compressed.
3x Continuous Optical Zoom
 The
superior quality Ricoh optics deliver zoom performance
equivalent to a 35-105mm zoom lens on a 35mm camera, and
make capturing the right shot quick and easy. Rather than
blowing up the image digitally and losing resolution, the
lens allows you to focus on your subject--and then frame
it precisely with a 3x optical zoom that maintains the
same crisp level of definition.
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