kcj wrote:
What does anyone know about the Meike 8 mm fish eye lens
I don't have one.
In fact, I don't have any fisheye at the moment. They are simply not a type of lens I use a whole lot. I've had them in the past, but sold them after a while because they weren't getting any use. Another response suggested renting, which is an option. But the Meike at $155 or so isn't a big investment, it would probably cost that or more to rent a high-end fisheye for two or three weeks!
But I do know there is one version for APS-C format mirrorless Sony e-mount, Canon EF-M, Oly/Panasonic micro 4/3 and Fuji x-mount.
There's also another version or variant of the lens claiming full frame/FX capability available for Canon EF and Nikon F-mount DSLRs.
I was very surprised to see it listed as rectilinear fisheye, which fills the entire image area,
even on full frame. On full frame often ultra short focal length 8 and 10mm fisheye like this only produce a round image within the image area, with a border of black around that (as shown in a previous response). According to all the listings I find for the Meike 8mm, that's not the case with it, at least with the version for Canon and Nikon DSLRs. (P.S. Canon's own discontinued full frame fisheye was 15mm. They now only offer an EF 8-15mm f/4L zoom fisheye, which makes a circular image on full frame at 8mm and a rectilinear one at 15mm... Oh and I just checked at Lensrentals.com and the cost to rent the Canon 8-15mm for a week is $73 before shipping, insurance and tax).
The Meike 8mm is manual focus AND manual aperture. Depending upon your camera, you might need to set it to "shoot without lens", because there is no electronic communication between lens and camera, so the camera doesn't "know" that lens is installed and might try to prevent the shutter from releasing.
Manual focus is no problem with a lens like this. A fisheye has such great depth of field you would hardly need to focus it much of the time.
The manual aperture isn't a very big deal, either. On most cameras you should still be able to use Aperture Priority auto exposure, as well as Manual + Auto ISO AE and plain Manual exposure mode (no Auto ISO).
I do have another Meike lens, a 12mm f/2.8 ultrawide angle that I bought to use on Canon M5 mirrorless camera (APS-C). It's similarly manual focus and manual aperture control only, as well. Frankly, I was surprised how nicely built it was, when it arrived! The body is all metal, the lens hood is plastic but fits well, and even the clip on lens cap is decent. No complaints from me! It even has decent sharpness and image quality, as you'll see in the blossoming Jacaranda tree image below (sorry, I don't recall what aperture I used and there is no EXIF data about that recorded with a non-electronic lens like this... it was probably a middle aperture like f/5.6 or f/8). Shot with a 24MP camera, I've prepped the image below to print 16x24", but haven't actually gotten it printed yet. This is a scaled down version for posting here, within the size limits of UHH. A higher resolution camera like a Canon M6 Mark II with 32.5MP might not work as well with this lens. The same might be true with the DSLR version of the lens, if it were used on a demanding and unforgiving camera like 50MP Canon 5DS or 45MP Nikon D850.
For a real budget priced lens, I wouldn't hesitate to recommend the 12mm Meike (which is also sold under the Opteka brand name). It's a far better lens than I expected for the price I paid (I bought a demo unit for quite a bit less than the usual price new).
Even though I don't have it, I suspect you'd find the 8mm fisheye is similar quality. There are some reviews of it online, if you do a Google search. You might also find it selling under the Opteka brand name (like the 12mm). At any rate, it's not a big investment and so long as you buy from a reputable dealer like B&H or Adorama, it would probably be returnable if you don't like it.