Canon CN20 50-1000mm Top Handle Mount
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Mounts to top of the Canon 50-1000 lens and provides an ARRI 3/8-16 mounting point for top handle. PROOF-OF-CONCEPT ONLY
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Note: This is a proof-of-concept design only. Do not carry your expensive lens with a handle that is screwed into 3D-printed threads!
The Canon CN20x50 50–1000mm is a large and heavy lens, so a top handle makes it considerably easier to carry and handle. Unfortunately, there are very few dedicated handles available, and they can be expensive. For example, the popular Denz carrying handle costs around US$950.
My design provides a mounting point at the rear of the accessory for an ARRI-style 3/8"-16 locating mount, allowing a compatible handle to be attached. Positioning the handle further towards the rear of the lens gives a more comfortable carrying position and better balance than the available Denz design.
Another advantage is that the handle can be quickly removed and reattached. Rather than having to fiddle with small screws every time the lens is packed away, the handle can remain separate during transport and be attached quickly when the lens is ready to use.
I've also included a second mounting point towards the centre of the accessory. This could be used for another accessory or handle configuration, and a cold shoe could be added towards the front for mounting a microphone or other accessory.
The design uses four M4 × 12 mm cap-head screws for mounting. Other top handles require different screw lengths for the front and rear mounting points. Using the longer front screws in the rear mounting position can result in the screw protruding too far and potentially causing expensive damage to the lens. To eliminate this risk, I adjusted the mounting offsets so that the same 12 mm screw can be used at all four mounting points. At the rear of the mount, the screw protrudes less, providing for safer installation and simplifying assembly.
The final version would ideally be CNC-machined from aluminium as a single piece. This would allow the rear handle mounting point to be moved slightly further back, while also allowing the front of the accessory to be made more rounded and compact.