All Tests Canon EOS (APS-C) Canon EOS (full F.) Nikon DX (APS-C) Nikon FX (full F.) Nikon 1 (CX) Sony Alpha (APS-C) Sony Alpha (full F.) Micro-Four-Thirds Four-Thirds Pentax K Pentax Q Samsung NX Fujifilm X Leica M DSLR Reviews PZ Rating System Lens Test FAQ Show 7Artisans 12mm f/2.8 (Sony E-mount) - Review / Test Report - Analysis Lens Reviews - Sony Alpha/NEX (APS-C) Article Index Introduction Analysis Sample Images & Verdict Page 2 of 3
DistortionOne of the most surprising aspects of this lens is the distortion characteristic. Mirrorless lenses tend to show heavy barrel distortion and rely on auto-correction. Instead, the 7Artisans 12mm f/2.8 shows a negligible amount of pincushion distortion (0.6%).  VignettingThe light falloff isn't quite as impressive though. The vignetting exceeds our usual scale for APS-C format lenses at f/2.8. Stopping down improves this gradually but the falloff is still very visible at f/8 (~1.4EV). To be fair - the Zeiss Touit 12mm f/2.8 and Sony 10-18mm f/4 didn't excel here either. MTF (resolution)The resolution characteristic is quite good albeit of course, not without flaws. The center quality is excellent straight at f/2.8. The borders/corner are soft at this setting though. Stopping down boosts the quality and you can expect a good outer field at f/5.6. Interestingly the corners are better than the borders throughout most of the range - this is quite rare. The sweet spot is at f/8 with good to very good results at the borders/corners. Diffraction has a higher impact beyond f/11. f/11 remains quite usable though. Field curvature is present but not extreme. There are some variations in terms of centering (optical alignment) but that's to be expected at this price point. Please note that the MTF results are not directly comparable across the different systems! Below is a simplified summary of the formal findings. The chart shows line widths per picture height (LW/PH) which can be taken as a measure for sharpness. If you want to know more about the MTF50 figures you may check out the corresponding Imatest Explanations 7artisans Photoelectric 12mm f/2.8 for Sony E (New) 7artisans Photoelectric 12mm f/2.8 for Fujifilm X (New) 7artisans Photoelectric 12mm f/2.8 for m43 (New) 7artisans Photoelectric 12mm f/2.8 for EOS M (New) Thông số kỹ thuật 7Artisans 12mm f/2.87artisans Photoelectric 12mm F/2.8 Specs Tiêu cự 12mm (35mm Tiêu cự quy đổi: 18mm) Khẩu độ tối đa f/2.8 Khẩu độ tối thiểu f/16 Ngàm ống kính FUJIFILM X Ống kính Format Coverage APS-C Góc nhìn 102° Khoảng cách lấy nét tối thiểu 7.87" / 20 cm Thiết kế quang học 10 thành phần trong 8 nhóm Số lá khẩu 7 Kiểu lấy nét Lấy nét thủ công Ổn định hình ảnh Không Kích thước filter Không có Kích thước (ø x L) 2.48 x 2.44" / 63 x 62 mm Trọng lượng 10.41 oz / 295 g Thông tin hộp sản phẩm Cân nặng 1.095 lb Kích thước hộp (LxWxH) 4.5 x 4.45 x 3.6" Re: 7artisans 12mm F2.8 - lens review (on Fuji X mount) 3 I had had the 7artisans 12/2.8 for my Fuji X cameras, and then went through the Fuji XF 14/2.8 and the XF 10-24/4 until I realized that the much-less-expensive 7artisans 12/2.8 had the focal length toward which I was tending anyway. It's also considerably smaller (and faster) than the 10-24. I'm impressed with sharp and rectilinear the 12/2.8 is. My sole complaint about it is that the bulbous front element is prone to damage. Although I am careful with my lenses, the cap came loose from the lens while being jostled around in my camera bag, resulting in the edge of the metal cap's causing a small scratch halfway between the edge and the center of the element. Although it's likely not to have any effect on the image, it made me wish that I'd paid another $20 or so for the filter adapter and a 77mm UV filter to protect it. Aside from that, I'd advise anyone to have no trepidation about buying this lens. It may be 7artisans' "best" lens. These were shot with this lens on the Fuji X-T4: Fujifilm X-t4 + 7artisans 12mm f/2.8 lens Fujifilm X-t4 + 7artisans 12mm f/2.8 lens Fujifilm X-t4 + 7artisans 12mm f/2.8 lens Sony a7R III Fujifilm X-T4 Sony 24-70mm F2.8 ZA SSM Carl Zeiss Vario-Sonnar T* 7artisans 12mm F2.8 Fujifilm XF 16-80mm F4 +1 more Keyboard shortcuts: FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads Color scheme?Blue /Yellow You may also likeLatest sample galleriesLatest in-depth reviewsThe fourth camera in Leica's SL series of full-frame mirrorless cameras sees the 60MP BSI sensor from the Q3 and M11 models arrive with a significant interface redesign. The Fujifilm X100VI is the sixth iteration of Fujifilm's classically-styled large sensor compact. A 40MP X-Trans sensor, in-body stabilization and 6.2K video are among the updates. The Nikon Zf is a 24MP full-frame mirrorless camera with classic looks that brings significant improvements to Nikon's mid-price cameras. 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