I bought myself another 2nd-hand lens yesterday, the EF8-15mm f/4 L fisheye. I've been considering one for a long time, but they don't come up locally all that often.
While it works well, it is not in perfect condition; it looks like the protruding front element has made contact with one or two things over the years, as it has a few very fine scratches, and the weather seal was pretty well mangled, as is relatively common with used L series lenses.
The seals aren't protected when the lens is capped and stuffed in your bag, and they're made of a fairly soft silicone, so they're easily snagged and torn if you aren't careful.
The new RF series caps are a bit bigger and protect the seal, so I have contemplated either getting a few of those, although they're a rather tight fit on the EF lenses, or perhaps 3D printing an extra ring to attach to the EF caps to cover up the seal.
Fortunately, the weather seal is a fairly straightforward repair now I've found a ready source of affordable replacement seals. I've made this repair on several of my lenses now with good results.
Hopefully I'll have some wacky fisheye photos from this lens to share soon.


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