The only micrometric tracking eyepiece that is still manufactured with the original Genuine Ortho lens set!
This means perfect sharpness, no reflections and no distortion across the entire field of view – just like the original Ortho design that Carl ZEISS launched as a pure measuring eyepiece. The focal length of 12.5 mm offers the optimal combination of high magnification, excellent viewing comfort and a generous eye relief.
Any guide star can be brought between the lines of the built-in micrometer scale by simply rotating the eyepiece - only then can the many off-axis systems in existence become really useful tools for astrophotography.
Using double reticule eyepieces or eyepieces with a simple reticule you are often forced to blur the guide star so that it does not suddenly disappear behind the thick reticule lines leading to complete failure - immediately costing you 2 magnitudes.
The fine etching of the micro guide eyepiece micrometer scale means you can safely keep sharply focused stars between the lines, allowing you to use much fainter stars as guide stars.
