Uploaded May 2014 | Updated September 2026, 3 days ago

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I am testing the Panasonic GH4 in UHD 4K mode with a Canon ENG lens, B4 mount, with the lens' doubler engaged. Video clip uploaded is straight from the GH4.

Testing here for blooming at wide open aperture, DoF, how the bokeh looks, etc. In general, I am impressed with what I getting out of the B4 lens.

Produced by Anthony Burokas of IEBA.com
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