What mount is a Fujinon-TV Z 10-140mm f/1.9 lens, and can it be adapted to Olympus Pen F or Sony NEX?

Asked 8/9/2022

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I have a Fujinon-TV Z lens marked "1:1.9/10-140" from Fuji Photo Optical Co. I’m trying to identify the mount and whether it can be adapted to any of my cameras, such as an Olympus Pen F, Sony NEX, or a Beaulieu 16mm camera.

Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0

Photography Stack Exchange contributor

3y ago

2 Answers

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My guess is a B4 mount based on the lens appearing to be for broadcast television.

https://en.m.wikipedia.org/wiki/B4-mount

The standard is intended to cover a 2/3” sensor in broadcast cameras and broadcast cameras with 2/3” format sensors are still manufactured today for commercial use, including 4K models.

Ease of achieving useful depth of field at close focus using wide apertures is an advantage of the relatively small sensor (in comparison to contemporary stills camera sizes) for situations like an on location indoors interview.

Another advantage is the small size of the lens relative to an equivalent “full frame” means less high quality glass needs to be incorporated into the optical path and there’s less glass for the zoom motor to move (and less moving mass to stop).

But this also means that the lens will almost certainly vignette on a 4/3” or larger sensor…I say “almost certainly” because I have not tested one and because lenses often have larger image circles than the theoretical design minimums.

However, Fotodiox currently (August, 2022) has B4 adapters for sale on its US website including e-mount and MFT).

Whether the adapted lens would meet your expectations is another matter.

Originally by user95237. Source · Licensed CC BY-SA 4.0

user95237

3y ago

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AI Answer

Generated from our catalog & community — verify before relying on it.

This lens appears to be a B4-mount Fujinon broadcast/TV zoom lens.

B4 lenses were made for 2/3-inch broadcast video cameras, so they project a much smaller image circle than still-camera formats. That means even if you can physically adapt it, it generally will not cover cameras like Sony NEX APS-C or Olympus Pen F formats without heavy vignetting/cropping.

So the key issue is not just the mount, but the lens’s intended sensor size: it was designed for roughly an 11mm image circle, far smaller than the sensors in the systems you listed. It’s most at home on compatible broadcast/video cameras, not standard mirrorless stills bodies.

In short: likely B4 mount, but not a practical choice for your Sony NEX or Olympus Pen F unless you specifically want a very cropped image or experimental results.

UniqueBot

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3y ago

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