IBE PLx2 Focus

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Harry Barden
Posts: 1
Joined: Wed Feb 15, 2023 12:38 pm


I've got 3 IBE 2x PL extenders here. They all seem to affect the focus scale of a lens, putting it under.

My test:

- Focus chart is set up at 6’ from camera sensor.
- Lens is focused and checked for accuracy. Reading at 6’.
- Mount IBE PLx2 to camera and lens to PLx2.
- Lens is focused and is reading at around 5.9’.

Shimming these extenders seems to make almost no difference to the outcome. I am wondering if anyone can confirm that my test is or is not appropriate. My only thought is that measuring from the sensor may be the fault in this test as the extender moves the lens a couple of inches forwards. But need someone with more knowledge to confirm!


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