MS-Optics APOQUALIA 2/28(II)
This is a record of using the APOQUALIA 28mm F2-II (MS-Optics / Miyazaki Optical) with a Leica M digital camera.
Table of contents
Gallery
APOQUALIA 28mm F2 Photo example (with Leica M10)
Impression
It is a very compact lens and fits well with small cameras such as the Lumix GM5.
When used with a full-size sensor, some scenes show peripheral distortion and light falloff when the aperture is wide open.
The minimum focusing distance is 0.35m when using the EVF of a mirrorless camera, making it a versatile lens that can be used for macro and table photography.
Compared to the ULTRON 28mm lens, the ULTRON lens is 51.2mm in length and the APOQUALIA lens is 9.8mm, 1/5th the length, and the ULTRON lens is 244g and the APOQUALIA lens is 9.8mm, 1/5th the weight. APOQUALIA=70g, 1/3 of the weight, which clearly shows the compactness of the lens.
Despite the compactness of the lens, there are no operability issues.
The focusing lever protruding from the lens barrel allows smooth focusing.
The aperture is located at the front of the lens barrel and can be changed by turning the hood attached to it. Since there is no click stop on the aperture, the aperture value must be checked on a scale.
Ms-optics compact lenses are recommended for use with cameras with smaller sensor sizes.
In the case of this lens, it is cropped to the equivalent of 43mm on the APS-C and 58mm on the Micro Four Thirds.
Thanks to the cropping, the effects of peripheral turbulence and light falloff, which can be a concern with full-size sensors, are virtually eliminated.
I really like the minimalist appearance of the combination of LUMIX GM5 and this lens, and the focal length of about 60mm is utilized for snapshots with an image that cuts through space.
Lens specification
Large-aperture wide-angle lens from MS-Optics (Miyazaki Kogaku), using a Gaussian lens format.
Long-lived lens leased for three generations.
Color variations have increased since the second generation, and the minimum focusing distance has been shortened to 0.35m (camera rangefinder linked to 0.8m).
The minimum focusing distance of the first generation was 0.8m.
| Item | Value | note |
| focal length(mm) | 28.8 | |
| Maximum aperture | 2.08 | |
| Minimum aperture | 16 | |
| Lens configuration | 4groups 5elements | Gauss-type |
| Minimum distance(m) | 0.35 | Linked to camera rangefinder from 0.8m to infinity |
| Lens length(mm) | 9.8 | |
| Lens max diameter(mm) | 50.0 | |
| Filter diameter(mm) | 28 | |
| Weight(g) | 70 |
Reference links
- ULTRON 28mm F2 lens introduction link for official page
- Wikipedia’s description of a double-Gaussian lens
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