Lightweight 15mm Lens Support Bridge (video camera rigging)

Here's a universal lens support bridge for the Arri LWS / Lightweight 15mm standard (60mm spacing on centre). You can use it flipped up or down depending on your needs and your lens diameter. Making this saved me about $400, maybe it'll do the same for you.

This is for lenses with a 1/4-20 threaded receiver on the bottom, such as most PL zooms and some primes. It is not meant as a "rest" support for lenses without a receiver. 

There is a slot to pass through a ¼-20 bolt or machine screw to connect the lens. The length of the bolt will be dictated by the distance from the support to your lens. 

I have included files for a ¼-20 spacer washer, 15mm diameter in lengths of 5, 10, 15, 20, 20.75 and 25mm. You can mix and match, or modify the height to taste in your slicer.

The rod clamps use M4 nuts and bolts. I recommend sourcing (or printing caps for) finger tiedown bolts for the rod clamp bolts and the lens bolt - just as with a purchased lens support, it makes adjustments more practical without needing to keep a few screwdrivers on hand. I also recommend a ¼-20 wingnut to keep the bridge, spacer, and lens bolt together when not in use. 

>>> Parts you will need <<<

• x2 M4 nut

• x2 M4 bolt / machine screw, non-countersunk. Recommend finger tie-down.

• x1 ¼-20 bolt / machine screw, non-countersunk. Recommend finger tie-down.

• x1 ¼-20 wingnut (optional)

Here are some printable tie down knobs I used and have been working well (pictured):

• For ¼-20 lens bolt (requires hex cap head)

• For M4 rod clamp bolts (requires hex cap head)

>>> Printing <<<

I printed everything in ASA at .15 Structural on a Core One. Pictured is Prusa jet black.

ASA or a material with similar heat/moisture resistance and strength would be a good idea. PETG CF or ASA CF would be really cool for this if that's in your wheelhouse.

For the bridge: Print on it's side so the 15mm rod holes are perfect circles. 5 perimeters and 5 layers top and bottom, 50% infill, gyroid. I wanted it beefy but still lightweight. So far so good. It's taking weight but not a ton-- I would just make sure the rod clamps are all perimeter and not infill so that area is solid. You will need supports for the inside of the ¼-20 slot. The M4 bolt/nut holes are fine without supports (save yourself the frustration of cleaning those little spots out!).

For the spacer: 100% infill.

For the knobs: Up to you, they're so small so I did 100%.

Update, Dec 2025: Added STLs of standard length spacers for convenience. Tweaked the suggested printing specs.