There are certain lenses that, as if some irreverent co-worker or stubborn body part, just refuse to cooperate with some of our other gear; either they don’t fit nicely in our bags, or don’t play well with ND filters, or what have you. Extremely wide and fast lenses are a culprit, fisheyes no different. Even on smaller system fisheye lenses, the glass often extends past the filter thread like some sort of exposed eyeball without an eyelid, making good of the aforementioned issue.
The team over at CheesyCam have recently shared a video illustrating a ‘Hack Tip’ on how to get this problem, and how to do it on the fly, and on the cheap. Really it’s a rudimentary solution which proves sometimes back to basics can be a great thing, as all it really utilizes is a Rosoco filter/gel (ND), and some blue tack. With those basic materials one would silly adhere the gel to the rear of the lens rather than the front. Interesting, and given the demonstration results, rather effective. But…
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A Word Of Caution & Thoughts
It seems to have been missed by many ‘watching’ this video, but this is really only to be used on mirrorless systems. Given the placement by the mount, it could cause damage to the mirror on an SLR.
Aside from that, I see the value in having an ND filter on this or indeed any lens, but I’m always curious about people who spend a handsome sum of coin on good/decent glass, and then fix to it a rubbish quality filter. If you’re playing around or just casual shooting, that’s ok, but.. Not to mention these types of gels aren’t even low quality filters…
Source: DIY Photography