40-45mm lenses (2026-10)

These are my 40-45 mm focal length lenses.

Mir-26B 45/3.5

Kenko Soft 45/4.5

Steable-Kata E 45/2.8

Carl Zeiss Jena Tessar 40/4.5

Meyer-Optik Helioplan 40/4.5

Pentax Q 01 8.5/1.9

Samsung NX 30/2

Actually, the Mir-26B 45/3.5 is almost ultra wide angle (24 mm equiv.) lens for 6x6 film, but I use it as a normal lens on an FF camera.

The Samsung NX 30/2 and the Pentax Q 01 8.5/1.9 have shorter focal lengths, but they are equivalent to 45 mm and 39/47 mm, respectively, when used with their native sensors.

See also related notes:

• My lenses by mount (2026-07) (2026-07-07)
• Pentax Q7: Angle of view with 03, 04, 05 lenses (2025-12-17)
• Pentax Q 01 8.5/1.9 Standard Prime (2025-09-23)
• Kenko Soft 45/4.5: 45mm soft focus lens (2025-09-03)
• NONS SL42 (II): Medium-format (P6) lenses - Biometar, Vega, Mir (2025-07-29)
• Carl Zeiss Jena Tessar 40/4.5 (M42x1): Non-retrofocus lens (2025-06-21)
• Staeble-Kata E 45/2.8 (M39x1/44): Standard triplet for Braun Super Paxette II (2024-06-24)
• Meyer-Optik Helioplan 40/4.5 (M42x1/45.5): Simple dialyte lens (2024-05-09)
• Pentax K 30/2.8 (1): В сравнении с Samsung NX 30/2 (2010-12-10)

Image albums:

• Carl Zeiss Jena Tessar 40/4.5
• Kenko Soft 45/4.5
• Meyer-Optik Helioplan 40/4.5
• Mir-26B 45/3.5
• Pentax Q 01 8.5/1.9 Standard Prime
• Samsung NX 30/2
• Staeble-Kata E 45/2.8

Staeble-Kata E 45/2.8: Samples [2] - FF - f/2.8

Camera: Sony a7c (FF, 24MP)

Lens: Staeble-Kata E 45/2.8 at f/2.8

See also related notes:

• Staeble-Kata E 45/2.8 (M39x1/44): Standard triplet for Braun Super Paxette II (2024-06-24)

Image albums:

• Staeble-Kata E 45/2.8

Fillmore tubeless valves: Leaking air

I recently noticed that a bike [tubeless] tire was losing air. The reason was a leaking Fillmore tubeless valve. The rubber part had swollen and could no longer seal properly.

So, I returned another tire valve back.

See also related notes:

• Fillmore tubeless valves (2026-05-23)
• Vittoria e-Barzo Trail 29x2.6: Tubeless mount (2026-03-13)

Image albums:

• Bicycle

New city Angarsk (1953): Panoramas (1)

Here are two panoramic images taken from the "Новый город Ангарск" (New city Angarsk) 1953 newsreel.

See also related notes:

• "Up the Angara River" (1973) (2026-07-17)
• New city Angarsk (1953) (2025-12-25)

Image albums:

• Angarsk

SZ Viewer W1-2026-10-13 (Windows), L1-2026-10-13 (Linux)

SZ Viewer (Windows, Linux) changes:

1. Minor changes and bug fixes.

See also related notes:

• SZ Viewer: общая информация (2014-02-15)

Pentax Q 03 3.2/5.6 Fish-eye: Samples [2] - 1/1.7" - f/5.6

Camera: Pentax Q7 (1/1.7", 12MP)

Lens: Pentax Q 03 3.2/5.6 Fish-eye, f/5.6 only, without software cropping (15mm equiv.)

As before, this lens is more useful with the Pentax Q7 than with the Pentax Q. Interestingly, the angle of view is too wide without software cropping, revealing some of the lens at the corners. Also, keep your hands away from the lens. Otherwise, they will be visible in the corners of the image.

See also related notes:

• Pentax Q7: Angle of view with 03, 04, 05 lenses (2025-12-17)
• Pentax Q 03 3.2/5.6 Fish-eye (2025-05-23)

Image albums:

• Pentax Q 03 3.2/5.6 Fish-eye

SZ Viewer A1-2026-10-09 (Android)

SZ Viewer (Android) changes:

1. Target API level 36 (Android 16).

2. Minor changes and bug fixes.

See also related notes:

• SZ Viewer: общая информация (2014-02-15)

"A city on the Angara river": Panoramas (3)

Two more (also see 1, 2) panoramic images taken from the "Город на Ангаре" (A city on the Angara river) documentary.

The second image shows one of the buildings with large lettering that is poorly visible. It reads, "Наша цель - коммунизм" (Our Goal is Communism).

See also related notes:

• "A city on the Angara river": Panoramas (2) (2026-08-27)
• "A city on the Angara river": Panoramas (1) (2026-08-09)

Image albums:

• Angarsk

Rear derailleur: the chain length

11-speed: Shimano RD-M8000 (Deore XT), RD-M9000 (Deore XTR), source: DM-RD0004-09-ENG.pdf

12-speed: Shimano RD-M6100/M5100/M5130 (Deore), RD-M7100/M7120 (SLX), RD-M8100/M8120/M8130 (Deore XT), RD-M9100/M9120 (Deore XTR), source: DM-MARD001-05-ENG.pdf

Image albums:

• Bicycle

Staeble-Werk Choro R 35/4.5: Samples [5] - 135 film - f/4.5

Camera: Zorki-6

Film: Ilford Pan F Plus ISO 50 (135 B&W)

Lens: Staeble-Werk Choro R 35/4.5 at f/4.5

There is no rangefinder coupling with this combination. So, scaling focusing was used.

See also related notes:

• Staeble-Werk Choro R 35/4.5 (M39x1/44): Very rare wide-angle triplet (2023-10-05)

Image albums:

• Staeble-Werk Choro R 35/4.5

Makita LXT tools (2026-09)

I use these cordless tools that are compatible with the Makita LXT 18V battery.

Makita DUR181RF - Grass trimmer

Makita DCL281FZ (BL) - Vacuum cleaner (with Makita 191D73-9 cyclone attachment)

Makita DUC150Z (BL) - Pruning chainsaw

Makita DTW285Z (BL) - Impact wrench (1/2")

Makita DGA504Z (BL) - Angle grinder (125mm)

Makita DHW180Z - Pressure washer

Honda 89160-PK1-405 (for 06161-PY0-900)

The installation manual (Honda 89160-PK1-405) that was included with a thermo-wax throttle valve assembly (Honda 06161-PY0-900).

 

See also related notes:

• Honda: карбюратор (механизм choke opener) (2015-02-10)

Image albums:

• Honda

Shimano BB-MT500-PA bottom bracket

The Shimano BB-MT500-PA bottom bracket: Hollowtech II (24 mm), Press-Fit MTB (92 mm or 89.5 mm).

Note the 2.5 mm spacer (for the 89.5 mm bracket shell only).

Image albums:

• Bicycle

Pentax M 200/4: Samples [3] - FF - f/4

Camera: Sony a7c (FF, 24MP)

Lens: Pentax M 200/4 at f/4

See also related notes:

• Pentax M 200/4 (2016-06-08)

Image albums:

• Pentax M 200/4

HP Z24n G2: Calibration factory report

The report was included with the HP Z24n G2 monitor.

I hope there were actual measurements, and data is not fake.

See also related notes:

• Монитор HP Z24n G2 (24", 1920x1200) (2020-09-11)
• Недорогой источник опорного напряжения (ИОН) на AD584LH (2018-04-09)

Image albums:

• PC

TOPUMP TB2 Pro: Tire inflation tests

I ran some tests with the TOPUMP TB2 Pro electric pump to see how long it would take to inflate tires before the pump ran out of power.

I waited 60 seconds between each attempt to allow the pump to cool down slightly.

Maxxis Rekon Race 29x2.4[WT]

#1: 0 to 2 bar for 1 min 27 sec

#2: 0 to 2 bar for 1 min 42 sec

#3: 0 to 2 bar for 1 min 51 sec

#4: 0 to 0.8 bar for 38 sec, and it's over.

Another tire after fully recharging the pump.

Kenda Small Block Eight 27.5x2.1

#1: 0 to 3 bar for 1 min 41 sec

#2: 0 to 3 bar for 2 min 01 sec

#3: 0 to 1.8 bar for 1 min 28 sec, and it's over.

So, with a fully charged pump, it is possible to inflate an MTB tire two to three times (from zero).

See also related notes:

• TOPUMP TB2 Pro: Electric mini pump (2026-08-05)
• Maxxis Rekon Race 29x2.4[WT] (2026-06-01)
• Kenda Small Block Eight 27.5x2.1 tires (2025-07-31)

VIOFO A119 Mini 2: Night sample

A fox is running across a road. This is just a sample night video from the VIOFO A119 Mini 2 dash cam.

https://www.youtube.com/watch?v=_QAxs5remU4

See also related notes:

• VIOFO A119 Mini 2: My new dash cam (2026-02-09)

Pentax Q 02 5-15/2.8-4.5 Standard Zoom: Samples [1] - 1/1.7" - 5mm - f/2.8

Camera: Pentax Q7 (1/1.7", 12MP)

Lens: Pentax Q 02 5-15/2.8-4.5 Standard Zoom at 5mm and f/2.8 (23mm equiv.)

The profiled lens correction is disabled in the raw converter.

Thanks to the larger sensor, the standard zoom lens on the Pentax Q7 has a shortest focal length equivalent to 23 mm. This is very good for an old compact camera. However, there is noticeable distortion.

In my opinion, the lens is too slow. I would like the lens to be 5-15/2-2.8, at least. The reason for that: the flange focal distance is too large for a mirrorless camera. It's 9.2mm with a 9.3mm sensor diagonal. This is similar to an SLR camera.

Image albums:

• Pentax Q 02 5-15/2.8-4.5 Standard Zoom