shared reference silicon wafer for comparisons

[Scarodactyl]

Those do look very interesting. Definitely curious about performance and pricing.

[leanderborg220]

I`m getting really confused about the coverage thing maybe because I`m still learning these things !
I assume that there should be a specification for circle coverage of an objective . I was assuming that coverage spec on sheet is listed as something like Real FOV (mm),(Eyepiece φ24mm)[mm], (Imaging device1/2-inch [mm].

Here below I`m comparing this spec [ON SHEET] of the Mitu 10x with the Sigma-koki 10x which are identical. So in reality there should be no difference in coverage I assume. Please correct me if I`m saying something wrong.

[lothman]

Here below I`m comparing this spec [ON SHEET] of the Mitu 10x with the Sigma-koki 10x which are identical. So in reality there should be no difference in coverage I assume. Please correct me if I`m saying something wrong.

Those datasheet coverage for ø24 eyepiece or 1/2" are the same, but on full frame camera you have 24x36mm sensor what needs a ø43mm image circle. Most microscope lenses do not cover this large image circle, at least not with sufficient resolving power. That is where Mitutoyo lenses shine.

[leanderborg220]

Here below I`m comparing this spec [ON SHEET] of the Mitu 10x with the Sigma-koki 10x which are identical. So in reality there should be no difference in coverage I assume. Please correct me if I`m saying something wrong.

Those datasheet coverage for ø24 eyepiece or 1/2" are the same, but on full frame camera you have 24x36mm sensor what needs a ø43mm image circle. Most microscope lenses do not cover this large image circle, at least not with sufficient resolving power. That is where Mitutoyo lenses shine.

Thanks for clearing things lothman. So the specs are only valid for a 1/2" sensor or that relates also differently? I intend to use a crop frame camera.

[Scarodactyl]

In addition to Mitutoyos outperforming their nominal specs, it is a common thing to copy the original item's spec sheet whether your imitation really matches it or not.