Ms-optics SONNETAR 1.1/25(Q)

This is a record of using the SONNETAR 25mm F1.1 (MS-Optics / Miyazaki Optical) with a PENTAX Q digital camera.

Table of contents

Gallery
Impression
Lens specification
Reference links

Gallery
Photo example by PENTAX Q7

Impression
The SONNETAR is a Q-mount lens about the same size as the Standerd01, and since the Standerd01 is 8.5mm, the SONNETAR is considerably more telephoto.
The maximum aperture is quite soft, and since the focus is set on the camera’s rear LCD, it is difficult to set the focus peak at the desired position.
When the aperture is wide open, the camera’s peak-of-focus indicator is also vague and not very reliable.
Since this is a digital camera, I feel that it is quicker to take a few shots by shifting the focus and selecting the best ones at the time of development.
It is difficult to use in some scenes because false colors occur when shooting raindrops under artificial lighting or sunlight.
I think it is good that it is a medium telephoto lens that fits in one hand when added to the Q camera, so it is easy to carry when you want to add a telephoto lens to your collection.

If I am not mistaken, this lens is the only third-party lens with a Q mount.
Considering the improved performance of the tiny sensor, I wish the Q mount would have continued to work a little harder to provide a camera with a high-performance EVF. As mentioned above, it is impossible to shoot with the rear LCD when using bright lenses.

Specification
MS-Optics (Miyazaki Optics) lens for the PENTAX Q. The lens format is the Sonar type.
The focal length of the lens is 25mm, which can be converted to 35mm version as follows.
In the case of Q/Q10 (1/2.3-inch sensor), it is equivalent to 137.5mm at 5.5x.
In the case of Q7/Q-S1 (1/1.7″ sensor), equivalent to 117.5mm at 5.5x
When magnification is applied, the lens becomes a fairly respectable medium telephoto lens, and the minimum focusing distance is 0.5m, making it a lens that can get close.

Before the PENTAX Q lens, a few were made for Micro Four Thirds with the same focal length of 25mm (unfortunately, they were not available).
The only color variation is black.

Item	Value	note
focal length(mm)	25
Maximum aperture	1.1
Minimum aperture	11
Lens configuration	4groups 5elements
Leaf blade	10
Minimum distance(m)	0.5
Lens length(mm)	24.5	Distance form mount frange
Lens max diameter(mm)	40
Filter diameter(mm)	34
Weight(g)	75g	with hood
Release date	Year 2013
List price(Yen)	48,000