Triplet wide angle lens PERAR 21
A review and Photo example of the MS-Optics PERAR 21mm F4.5 .
Table of contents
Gallery
- Sample photos taken with the Leica M8.
Review
1．Overview
The Perar 21mm F4.5 is a wide-angle lens released in 2015, the sixth product from Ms-optics (Miyazaki Optical) and the fourth in the Triplet series.
The detailed specifications of the lens are listed in the table, but the main specifications are as follows.
- Lens configuration: 3 elements in 3 groups
- Aperture: F4.5~F16
- Aperture blades: 10
- Lens thickness: 5mm
- Minimum shooting distance: 0.5m
- Range of rangefinder coupling for Leica M-type rangefinder cameras: 0.8m
- A 25mm diameter filter is screwed onto the front of the lens
- A dedicated 25mm diameter trumpet-type hood is included
2．Usability
As the word SUPER TRIPLE is written on the lens, the lens is a triplet of three elements in three groups, and Ms-optics has given the name PERAR to the triplet series.
The lens is 5mm thick, and the lens barrel is as thick as a flat body cap.
As with other Perar series, the image quality is similar, and it is surprising that such image quality can be obtained with a simple lens of three elements. You can see this in the depiction of young leaves even in the reduced images in the gallery.
Although it is a very compact lens, there is no problem with operability, and the focus can be adjusted smoothly by sliding the focus lever at the bottom of the lens barrel. The aperture is located at the front of the lens barrel, so it can be changed by turning the hood attached there. There is no click stop on the aperture, so the exact aperture value must be confirmed visually.
The minimum shooting distance is 0.5m, although it is not linked to the camera rangefinder, and you can take closer shots by using an EVF on a mirrorless camera.
This lens is also a compact lens, a feature of the Perar series, and is a lens that suits small body volumes such as the MINOLTA CLE film camera, the SONY NEX series digital camera, and the LUMIX GM5.
Because it is a three-element lens, perfect correction is not possible, and there is image distortion due to peripheral field curvature, slight pincushion distortion, and when shooting a blue sky at full aperture with an old 35mm full-frame sensor camera such as the Leica M typ240, a magenta color cast appears depending on the angle of the light.
One way to avoid these is to use a smaller sensor size and cut out the problematic peripheral areas.
- On an APS-H size sensor, it is 27mm, substituting for a wide-angle 28mm.
- On an APS-C size sensor, it is 32mm.
- On a Micro Four Thirds system, it is 42mm.
3．Add Info.
The focal length of 21mm is the main battlefield for wide-angle lenses, and various manufacturers have released lenses with the same focal length. The 21mm / F4.5 class lenses, which are the specifications of this lens, are close to those of Voigtlander’s 21mm-P type and Russia’s Rusal, both of which are sufficiently compact lenses, but as you can see from the comparison table, PERAR is even smaller than them.
When using a 35mm full-size sensor, retrofocus lenses rarely exhibit color casts, but lenses with the rear end of the lens close to the sensor surface, including this lens, are more likely to exhibit color casts.
The PERAR series of three elements in three groups from Ms-optics includes four lenses, including this lens, and has released wide-angle lenses with slightly darker maximum aperture F values: PERAR-35mm F3.5, PERAR-28mm F4, and PERAR24mm F4.
Specification
| Item | PERAR | COLOR SKOPAR | New Russar+ |
| focal length(mm) | 21 | 21 | 20 |
| Maximum aperture | 4.5 | 4 | 5.6 |
| Minimum aperture | 16 | 22 | 22 |
| Aperture blade | 10 | 10 | 6 |
| Lens configuration | 3 elements in 3 groups | 8 elements in 6 groups | 6 elements in 4 groups |
| Minimum distance(m) | 0.5 ∞ to 0.8m is camera rangefinder-linked | 0.5 ∞ to 0.7m is camera rangefinder-linked | 0.5 |
| Lens length(mm) | 5.2 | 25.4 | 23 |
| Lens max diameter(mm) | 50 | 55 | 55 |
| Filter size | 25 | 39 | 49 |
| Weight(g) | 45 | 136 | 112 |
| Hood | Dedicated trumpet-shaped hood | LH-11 Dedicated cylindrical hood | – |
| Lens mount | M | VM | L39 |
| Release date | 2015 | 2007 | 2014年12月05日 |
| Price | -¥60,000 | -¥55,000 | -¥63,000 |
Reference links
Update history
- 2025.3.12
- 2024.03.09:Update article
- 2022.04.26:First draft
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