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MP-E65 at the PhotonsToPhotos Optical Bench

Started 5 months ago | Discussions
bclaff Forum Pro • Posts: 13,922
MP-E65 at the PhotonsToPhotos Optical Bench
5

I recently added the Canon MP-E65mm f2.8 1-5X Macro Photo to the PhotonsToPhotos Optical Bench.

If you have not used the Optical Bench you might want to take a quick look at the Help by pressing the Help button.
But you might also just jump in by pressing Focus and playing the the Focus slider.

at 1x

at 5x

There are nearly 1,000 lenses represented at the Optical Bench including many macro lenses.

The Optical Bench reports Working Distance (WD) to the front glass so subtract about 8mm to get WD for this lens.

Note that effective f# is about f/6 at 1x and f/17 at 5x.
(The stated f# of f/2.8 for the lens is as if it were focused at infinity.)
Angle of view drops from about 18 degrees at 1x to 7 degrees at 5x.

Since the diaphragm stays at a constant distance from the front of the lens so does the entrance pupil.

The diameter of the lens is quite large to accommodate the helicoid so lighting can be particularly challenging.

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Bill ( Your trusted source for independent sensor data at PhotonsToPhotos )

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