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The 7Artisans 10mm f/2.8 Fisheye is part of a unique group of lenses. There are some seriously wide-angle rectilinear lenses available for mirrorless full-frame cameras, but fisheye lenses really take off the blinkers.
The 7Artisans 10mm f/2.8 Fisheye ED is an ultra-wide-angle lens for full-frame cameras. It comes in a rugged aluminum body and has an enormous 178 angle of view. As a diagonal fisheye, it illuminates right into the corners of the image. The look of the shots is convincing with an impressive sharpness and great bokeh. With the closest focusing distance of 17cm, you can creatively set the scene for your subject. 11 optical elements in 8 groups produce high imaging performance. A stepless aperture ring has been installed for silent stopping down when shooting movies. The aperture and focus adjustment is manual.
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This new 7.5mm f/2.8 from 7Artisans produces rectangular images that cover the entire APS-C format, unlike Circular Fisheye lenses which produce round images within the rectangular field. The equivalent focal length on a Fujifilm APS-C camera is approximately 11mm. You can learn more about circular fisheyes from our article: Meike MK 6.5mm f/2 Circular Fisheye Lens Review. And if you already own a Circular Fisheye, here are some useful tips to help you maximize enjoyment: 10 Tips for Shooting with a Circular Fisheye Lens.
Overview & First Impressions
Solid, high-quality feel in the hand. The focus ring completes its arc in about 1/5 of a turn and the aperture ring is click-free for silent video production. The bulbous front element is nicely protected by the built-in lens shade. The lens mount is metal and the included front lens cap is sturdy metal and snug. Overall, this lens is quite impressive.
Full Field Fisheye vs. Circular Fisheye
This is a Full Field fisheye. The image it captures wraps across the entire frame, which in this case is APS-C in size. The alternative type is the Circular Fisheye that creates a round image in the middle of the frame.
The advantage of the Full Field model is that it can be used more-or-less like a super-wideangle, as long as the user is aware that the 190 coverage is certain to introduce some apparent distortion, generally in the form of converging parallel lines.
The second generation of 7Artisans 7.5mm f/2.8 is an improved design. A single glass component with a higher refractive index is used in the front element group to replace the first generation cemented glass. The rear group is now Hoya ED optical glass and it effectively limits chromatic aberration.
Field Performance
Make sure that the camera body is configured to function with manual lenses. Some cameras must be set to fire without a lens attached, since the electronic camera body is unable to detect a manual lens that has no electrical contacts.
Exposure is not automatic. Set the camera on Aperture Priority and select a suitable f/stop. I shot mainly around f/5.6 or between f/5.6 and f/8. All Full Field fisheye lenses have a tendency toward vignetting (corner shading) and that phenomenon is exacerbated by very small apertures. Surprisingly, I encountered only minimal shading with the 7Artisans lens. This is the first 7Artisans lens I have reviewed; I hope this is a characteristic shared throughout their entire lineup.
Disclaimer: no fish were harmed during the manufacture or testing of this lens. One of the temperamental blowfish got a bit puffed up about it, but it deflated quickly. He was just a bag of hot air, anyway.
Log in or register to post comments COMMENTS Great Lens - But Submitted by dcxdan on September 28, 2021 - 5:33pm I'm not sure this is my 7Artisans 7.5mm Fish Eye lens - bought mine in January of this year. But I hope they made the aperture ring clickable. Mine is NOT, and does not stay on what aperture I set it at. What a pain to use with it moving all the time. But, for the money it produces great photos.
Hi. I'm a panoramic photographer (360) and I use a Nikon Z7 (FX) with 8 - 15 fisheye lens and a complete 360 results with 4 shots with this setup. I would like to try with Z30 APS-C but I have de doubt about how many shots I would need with this 7Artisans.
Maybe would you know the answer?
AB,
I'm surprised you get satisfactory results using a fisheye to shoot a four-panel panorama. How do you align the horizons? Could you possibly upload one image to the Shutterbug Photo of the Day gallery? I'd love to see one, and I'm sure our readers could learn something.
Regarding your specific question, no, I'm sorry I can't provide an answer. You can do the math, though, simply divide the lens's horizontal angle-of-view into 360 unless you need to overlap small margins on either end of each frame.
Jon
A few weeks ago 7artisans temporarily suspended the orders for their new 10mm f/2.8 fisheye full-frame mirrorless lens for Nikon Z-mount. Pre-orders are now open again at the Photo Rumors Online Store (the free shipping is expected to start by the end of June).
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As this is the first fisheye lens we reivew here it might make sense to have a short look what differentiates a fisheye lens from a normal ultra wide angle lens.
The TTArtisan 11mm 2.8 is a diagonal fisheye, meaning it covers a field of view of 180 diagonally. There are also circular fisheyes that cover only a round image with a field of view of 180 in all directions.
But this is not the whole story, without going too much into detail of different fisheye projections (you can do that here or here) the shape of objects closer to the corners stays closer to what they actually are. You can see that in the comparison above, the reflection of the lamp is round in the fisheye image while it is streched in the image of the rectilinear lens. So, depending on what part of the image you look at, the distortion of a fisheye lens may actually be less, not more.
In terms of the color scheme this looks very much like a Leica M lens including the famous red dot. Markings are yellow/white (seem to be slightly engraved and filled with paint) and the focus ring has a very nice resistance and turns about 90 from the minimum focus distance of 0.17 m to infinity.
The aperture ring is a more basic design without click stops and with varying distance between the stops. It also features a small tab which is useful as it is very narrow and a bit on the stiff side.
The lens seems to be mostly made from metal and a metal slip on lens cap is included as well. My lens also shipped with an 11mm optical viewfinder, which will be useful for Leica M users, but I am not sure whether it is an optional accessory, so if you need it be sure to get it with the lens.
With our usual approach we cannot get decent values on the vignetting of fish-eye lenses. What I can tell you is that the vignetting figures are significantly lower than those of rectilinear ultra wide angle lenses, especially compact ones.
Also similar to the Voigtlander UWA primes and some of the wide Laowa primes (12mm 2.8 and 15mm 2.0) this lens shows some slight green color cast in the corners which can become visible with bright skies.
The center actually looks really good starting from wide open and even the midframe does not lack far behind. Only the corners benefit from stopping down a bit, but f/4.0 is enough to make the whole frame look good when focusing at the center.
There is still a bit of filter stack induced field curvature with this lens. Unlike most other wide angle lenses designed for Leica M mount the penalty when using this lens on a Sony instead of a Leica camera is not as big in terms of sharpness, but have a look at the coma section, where the difference is more obvious.
With the minimum focus distance of just 0.17 m you can get really close to your subject and might even be shading it with your lens.
Already wide open the image quality is very good in the center and further increases on stopping down a bit.
There is quite some field curvature and also some other aberrations off center at this distance though, but this should hardly be an issue in the field with a fisheye lens.
The comparably fast maximum aperture coupled with the minimum focus distance of only 17 cm allows to get quite a decent amount of bokeh in your shots, but being an ultra wide fisheye lens you need to be really close to your subject to do so.
The TTArtisan 11mm 2.8 fisheye features 7 aperture blades. This is rarely good news for distinct sunstars as can be seen from the crops above. Between f/2.8 and f/5.6 the sunstars are frayed and not well defined, only at f/16 they become pointed.
This is a highly subjective topic so you might want to have a look at this article and decide for yourself, what you prefer.
The coma correction is okay at f/2.8 and good from f/4.0, but the field curvature becomes a problem here: if you focus on the center the corners will look worse (and vice versa). This is very unfortunate for astrophotography, where you want all of the sky at infinity in focus.
All the fisheye lenses I tried so far (4 including this) had noticeable lateral CA and the TTArtisan 11mm 2.8 fisheye is no exception here. The correction in camera for Jpegs or in Lightroom still does a good job, so this is hardly something to worry about.
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