SG-image MF 7.5mm F2.8 Fisheye

Focal length: 7.5 mm
Aperture: f/2.8
Weight: 326 g
Filter diameter: –
Min. focus distance: 12 cm
Length: 54 mm

Overview

The SG-image MF 7.5mm F2.8 Fisheye is a manual focus fisheye lens for APS-C and Micro Four Thirds cameras. SG-image offers it for Sony E, Fujifilm X, Nikon Z, Micro Four Thirds, Canon EF-M, Canon RF and Leica L. With a 168 degree angle of view it produces the curved, stylized look typical of fisheye optics, where straight lines near the edges bend. The manufacturer recommends it for creative projects, unusual architecture shots and playful experiments.

Optical design

According to SG-image the lens has 11 elements in 9 groups. The diaphragm has 7 blades and runs from F2.8 to F16 on a clicked aperture ring. The minimum focus distance is only 0.12 m, with a maximum magnification of 1:1.1 listed in the spec sheet. The front element is a bulbous fisheye element, so the lens has no filter thread and the spec sheet states that filters are not supported. SG-image does not name special glass types.

Focusing and handling

Focusing is manual. SG-image points out that the very deep depth of field of such a short focal length makes manual focusing easy, and that you can often set a distance and rely on hyperfocal focusing to keep most of the scene sharp. The aperture is set on a ring with click stops, so the lens works almost like a point-and-shoot tool once you have chosen a setting.

Build and size

The lens has an all-metal construction according to the manufacturer. It measures 63 mm in diameter and 54 mm in length and weighs about 326 g. These values come from a single spec sheet for all seven mounts. Without a filter thread, lens protection has to rely on the supplied cap and careful handling.

Where it fits

Fisheye lenses for these systems are plentiful in the database. The 7artisans 7.5mm F2.8 Fisheye is the closest comparable lens, offered for Fujifilm X, Canon EF-M, Micro Four Thirds and Sony E. Samyang offers the 8mm F2.8 UMC Fisheye II for Sony E, Fujifilm X and Canon EF-M, and for Micro Four Thirds there is the Samyang 7.5mm F3.5 UMC Fisheye MFT.

Pros and cons

Pros

Strong 168 degree angle of view
Very short minimum focus distance of 0.12 m
F2.8 maximum aperture is fast for a fisheye
Metal construction
Offered for seven mounts

Cons

Manual focus only
No filter thread, filters are not supported
At about 326 g it is heavy for a small fisheye
Limited use outside of creative or special-effect work
No weather sealing mentioned

Verdict

The SG-image MF 7.5mm F2.8 Fisheye is an inexpensive way to try fisheye photography on an APS-C or Micro Four Thirds camera. The very close focusing and deep depth of field make it easy to use, but the missing filter thread and the specialized look mean it works best as a second lens for creative projects.

Technical Specifications

min focal length: 7.5 mm
max focal length: 7.5 mm
max f (min zoom): f/2.8
max f (max zoom): f/2.8
min. aperture: f/16
Elements: 11
Groups: 9
Weight: 326 g (0.72 lb)
Filter diameter: –
min focus distance: 12 cm (4.72 in)
Length: 54 mm (2.13 in)
Diameter: 63 mm (2.48 in)

Simulate depth of field and angle of view

Which cameras does the SG-image MF 7.5mm F2.8 Fisheye fit?

The SG-image MF 7.5mm F2.8 Fisheye fits all Micro Four Thirds cameras. There its field of view equals 15 mm in full-frame terms (crop factor 2).

Micro Four Thirds cameras

Micro Four Thirds:: OM System PEN, OM System OM-3, OM System OM-5 Mark II, Panasonic Lumix G97 (G99M2), Panasonic Lumix GH7, OM System OM-1 Mark II, Panasonic Lumix G9 II, Panasonic Lumix G100D, OM System OM-5, OM System OM-1, Panasonic Lumix GH6, Panasonic Lumix GH5 II, Olympus PEN E-P7, Olympus OM-D E-M10 Mark IV, Olympus OM-D E-M1 Mark III, Panasonic Lumix G100 (G110), Panasonic Lumix BGH1, Olympus PEN E-PL10, Olympus OM-D E-M5 Mark III, Panasonic Lumix G95 (G90, G91), Olympus OM-D E-M1X, Panasonic Lumix GX9, Panasonic Lumix GF10 (GF90, GX880), Olympus PEN E-PL9, Panasonic Lumix GH5S, Blackmagic Pocket Cinema Camera 4K, Panasonic Lumix G9, Olympus OM-D E-M10 Mark III, Panasonic Lumix GF9 (GX850, GX800), Panasonic Lumix GH5, Olympus PEN E-PL8, Olympus OM-D E-M1 Mark II, Panasonic Lumix G85 (G80, G81), Panasonic Lumix GX85 (GX80, GX7 Mark II), Olympus PEN-F, Olympus OM-D E-M10 Mark II, Panasonic Lumix GX8, Panasonic Lumix G7, Panasonic Lumix GF7, Olympus OM-D E-M5 Mark II, Panasonic Lumix GM5, Olympus PEN E-PL7, Panasonic Lumix GH4, Olympus OM-D E-M10, Panasonic Lumix GM1, Olympus OM-D E-M1, Panasonic Lumix GX7, Olympus PEN E-PL6, Olympus PEN E-P5, Panasonic Lumix G6, Panasonic Lumix GF6, Blackmagic Pocket Cinema Camera, Olympus PEN E-PM2, Olympus PEN E-PL5, Panasonic Lumix GH3, Panasonic Lumix G5, Panasonic Lumix GF5, Olympus OM-D E-M5, Blackmagic Cinema Camera (MFT)