Lensrentals is known for its in-depth teardowns of the latest and greatest camera gear, but not everything has to be about destruction. For a change of pace, Lensrentals has decided to build a lens rather than destroy it.

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In particular, Roger and his team have shared the above video and an accompanying blog post highlighting the construction of the the widest fisheye lens in existence, the C-4 Optics 4.9mm F3.5 Hyperfisheye Prototype.

Photos kindly provided by Lensrentals

Much like the 1970s Nikkor 6mm f/2.8 fisheye lens, the C-4 Optics 4.9mm F3.5 Hyperfisheye Prototype is so wide that it can actually see behind itself. It takes it a step further though; Instead of the 220-degree field of view of the Nikkor lens, the C-4 Optics fisheye, of which only two have been made, has a 270-degree field of view. Not only is it wider though, it's also sharper and has less distortion and vignetting.

An individual element is stacked on top of another during the construction of the lens.

The entire construction is a doozy from beginning to end, with individual elements costing as much as $5,000, but as always Lensrentals manages to get it down with impeccable results. The final result is an unusual-looking lens that has legs and a backplate to help support the massive hunk of glass and metal.

'For those of you who are curious, a smaller Sony camera (A7xxx) fits nicely protected within the legs,' says Roger in his blog post. 'For larger cameras the bottom platform can be removed, the legs extended or removed, and various apparatus (rods, follow focus, aperture control, etc.) mounted directly to the cheese plate.'

Roger notes the lens won't be available to rent, so don't get your hopes up. To see the full build and soak up the details, head over to Lensrentals.