Model K2/S Long-Distance Microscope
Model K2/S with Standard Objective,
Optional CF-2 objective and S-Type Lens.
For over twenty years, Infinity's Model K2 has been the world standard in long-distance microscopes. Now, improvements in its internal construction make Model
K2/S Infinity's definitive, state-of-the-art instrument capable of resolution and magnification comparable to that of a regular laboratory-type microscope—but
at many times greater working distances.
No other manufacturer's long-distance microscope provides operational ranges or potential resolving powers equal to Infinity's K2/S.
Internally-focused by Infinity's patented AVS system, the K2/S can literally be used to the limits of optical microscopy. Essentially, the K2/S can be configured
to image a "Blood Moon" down to a blood cell—even, if required, with a 1.4 NA oil immersion microscope objective—in transmitted or coaxial illumination.
As if that were not enough, the K2/S is considerably lighter in weight than competitive instruments. This means that equivalent accuracy can be obtained from
less-expensive positioners which do not have to bear such bulk or weight.
A refractor (like typical laboratory microscopes), the K2/S is suited for experiments where other long-distance microscopes—particularly the artifact-producing
mirror/lens (catadioptric) systems—can not be used. After all, today's experiment may not be next month's—especially if it is necessary to confirm the findings
of others who have used the K2 (now, K2/S) in their work. A recent scientific paper (presented here not as a testimonial but as a technical analysis that stands
on its own merits) details how and why researchers chose to use the K2 long-distance microscope for their experiment:
http://www.tu-braunschweig.de/Medien-DB/ism/pchristian-kaehler.pdf
K2/S Configurations
Three Operating Ranges
For two of the three K2/S operating ranges, a Standard or CF-Series Objective is directly attached to its front dovetail. The third range is obtained by attaching
the InFocus™ Microscope Objective Holder with an adapter for any infinity-corrected microscope objective made by Infinity Photo-Optical (Achrovid™,
Mitutoyo, Olympus, Nikon, Edmund or Edmund REFLX™. Depending on the objective, the K2/S can be used in transmitted or coaxial illumination (by interfacting
the Coaxial Illuminator).
Standard (S) Range (infinity to 560mm)
Model K2/S InFocus™ Objective Holder
& Microscope Objective Adapter
(for transmitted/reflected illumination)
The Standard Range is the greatest offered from any long-distance microscope on the market today. For focus from infinity down to 560mm, the Standard Objective
is used in conjunction with the internally-positioned S Lens. The two lens systems work harmoniously as a matched system. This unique approach assures the
finest imagery ever offered by any K2 model in the Standard Range of operation. However, any previous K2 can be modified to "S" status by adding a
simple Upgrade Kit and using the new Standard Objecitve with it).
Close-Focus (CF) Range
By removing the S Lens (which does not disturb the mounting of the K2/S on a fixed stand or positioner), CF-Series Objectives can be exchanged with the Standard
Objective for progressive focus from 660mm (CF-1) down to 51mm (CF-4). Depending on the chosen objective, primary magnification ranges from 0.9x to 10.7x.
Additional amplifiers permit these primary magnifications to be further enlarged.
High-Power Micro Mode
Model K2/S InFocus™ Objective Holder
Shown with Coaxial Illuminator,
Microscope Objective Adapter
and Achrovid Objective
The K2/S can also operate in the high-powered micro mode by simply attaching the InFocus(tm) Microscope Objective Holder and the appropriate adapter for infinity-corrected
objectives: Infinity Photo-Optical Achrovid™, Mitutoyo, Olympus, Nikon, Edmund, Edmund REFLX™, etc.. Whether
in coaxial/epi- or transmitted illumination, these K2/S accessories permit it to achieve high magnifications-literally to the potential limits of optical microscopy.
The Universal Imager
Truly, if a single product could be a universal imager, the K2/S would surely qualify. Defying obsolescence, every K2 made since 1986 can
be upgraded to "S" status. For these and many other reasons, the K2/S is literally in a class by itself. Truly, the World Standard is now even better!
We invite you to investigate the full potentials of the Model K2/S. The PDF files below offer complete dimensional and configurational information—as
well as magnification tables and other data.