OMAX - FBA_CS-A36CALM1 0.01mm Microscope Camera Calibration Slide (Stage Micrometer)

excellent quality, excellent price!

Excellent

This slide has a one millimeter scale, subdivided into tenths and hundredths (i.e. ten-microns). You can imagine, therefore, that the graduation lines are quite thin. Despite this, the outline of those graduations is precise and clear. Does the job well, and easy to use because of that clarity.

The microscope calibration slide I recently purchased met all expectations and was delivered very quickly. I am 100% pleased with the product and the with the shipping time!

The ruler is a thick film metalization layer on the glass. This makes the quality much higher than the optically exposed film slide that I broke and had to replace! Nice!

Its a little tricky to correctly position the sample to be able to see the calibrates, but it works

just......wow!

Seller Amazon does themselves a disservice by not showing a clearer image of the calibration marks on this slide. The marks are photo-lithographed metal, probably sputtered onto the slide in a vacuum chamber similar to a semiconductor manufacturing process. The circle surrounding the 1.0 mm ruled line is about 3 mm in diameter and approximately 30-45 microns wide. The 1.0 mm ruled line is divided into major divisions of tenths, or 100 microns per major division. The major divisions are delineated by longest lines. Each major division is divided into two intermediate divisions by intermediate-length lines; so 50 microns per intermediate division. Each intermediate division is divided into five smallest divisions of 10 microns each. I estimate the line width delineating each small division to be about 2 microns wide; so were talking about very precision manufacturing for this calibration slide. Note that I cannot vouch for the absolute accuracy of the length of the full 1.0 mm graduated line. I can simply report that the full graduated line is divided very evenly and precisely into 100 small (~10 micron) divisions. Very impressed. The only negative that I have to report is that the ridges inside the plastic cover do not support the slide thickness very precisely. Consequently the slide has some play within the case when transported. Wrapping the slide back up in the thin paper in which it is originally packaged inside the plastic storage case solves that problem.

just what it should be.

Excellent for what were using it for - scale for a single image to calibrate other images on that stereoscope at the same optical zoom.