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B4 Broadcast Lens Adapter (Sony E-mount) — image 1

B4 Broadcast Lens Adapter (Sony E-mount)

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A set of files to adapt broadcast lenses of 48mm, 38mm, and 35.74mm flange distances to Sony E-mount cameras.

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A set of files to adapt broadcast lenses of 48mm, 38mm, and 35.74mm flange distances to Sony E-mount cameras.

Video: https://youtu.be/gs_-Hb7HiKc

4 parts required to build an adapter: "BAYONET", "BAYONETBACK", "EMOUNT", "BARREL"

Parts that require screw fixtures exported with option for M2 heat set insert (3mm holes) or roughly #4 wood screws (2mm holes).

Barrel part is exported for 3 flange distances:

48mm is the B4 standard, most common

35.74mm is lenses made for 1/2" 3-CCD cameras from JVC, Hitachi, Panasonic, others, but not Sony

38mm is lenses made for 1/2" 3-CCD Sony cameras.

If you've got a lens but don't know what camera it goes to, you might just have to trial and error to see which flange distance yours is. I believe anything past 1992 with this bayonet mount is gonna be standardized to 48mm distance.

Screw pattern is slightly irregular to guarantee correct angles of assembly. Just make sure you install the "BAYONETBACK" part the intended way (chamfers for screw holes facing out), otherwise lock/unlock orientation will be a bit off.

Files are provided in .stp to maintain some editability for you.