2024-06-02
[SMC] Pentax FA 43/1.9 Limited: Two versions
Information about two versions of the [SMC] Pentax FA 43/1.9, both made in Japan: http://stevenlinss.blogspot.com/2014/10/pentax-fa-4319-limited.html (In Chinese), English translation .
2024-06-01
Pentax K 35/3.5: Samples [1] - FF - f/3.5
Photos taken with the Sony a7c (FF, 24MP) and the Pentax K 35/3.5 at f/3.5.
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Image albums:
2024-05-31
Old service manual and VirtualBox (again)
A Suzuki Grand Vitara service manual (I needed it for ECM pinout) is made using 15 year old technology (bundle of HTML files) instead of a plain PDF (portable through time). Same case as the Jeep KJ 2007 service manual. And again, I use Windows XP (with its MS IE browser) running in VirtualBox.
This is the easiest way for me. And it works.
See also related notes:
- Suzuki N32 (Grand Vitara JB632W) ECM pinout (2024-05-23)
- Инструкция по ремонту KJ в Windows XP (2022-11-21)
Image albums:
2024-05-30
Carl Zeiss Jena Tessar 50/3.5 (M40x1): Uncoated (non-T) version
I already have a lens for the old M40x1 SLR mount (Praktiflex). It is a triplet called the Anastigmat Victar 50/2.9. I was thinking about a Tessar for the M40x1, but usually these are coated versions (with a red T mark). In the end I chose such the Carl Zeiss Jena Tessar 1:3,5 f=5cm:
As you can see, there is no red T mark. So there is no lens coating (or at least I don't see it).
According to the serial number, the lens was made around 1945-1947. So it is as old as the mentioned Victar. These two are my oldest lenses. And both have no lens coating.
The main difference is of course the optical design. The Victar is a triplet. The Tessar is "surprisingly" a Tessar. Today the Tessar is a trademark, not related to the optical design.
The Tessar 50/3.5 has 4 elements in 3 groups.
The aperture has 14 blades.
That is a lot for a 50mm lens! Practically round shape at any aperture.
The aperture ring has no clicks, it turns smoothly (from f/3.5 to f/22).
Although it was a budget lens, the focusing mechanism was quite advanced. The front (threaded) part doesn't rotate when focusing or changing the aperture.
The minimum focusing distance is about 0.6-0.7m according to the scale. But my copy can focus much closer, I think the copy is modified.
Comparison of the Tessar (in the center) with the Industar-50 50/3.5 SLR M39x1 (on the left) and the Industar-50-2 50/3.5 SLR M42x1 (on the right):
The Industars (Tessar-like USSR lens series) are much cheaper: fewer aperture blades and simpler focusing design. The Tessar is much nicer to use. Maybe the rarer Industar-22 50/3.5 (unfoldable M39x1 version for SLR) is closer to the Tessar.
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2024-05-29
Helios-40 85/1.5: Samples [1] - APS-C - f/1.5
Photos taken with the Samsung NX10 (1.5x crop factor, 14.6MP), the Samsung NX2000 (1.5x crop factor, 20MP), and the Helios-40 85/1.5 at f/1.5.
(NX2000)
(NX2000)
(NX2000)
(NX2000)
(NX10)
(NX10)
It is possible to focus to infinity with the M39x1-M39x1 16.4mm extension tube and a M39x1/28.8 adapter. But 1/4000 (the limit of these NX cameras) is not enough for outdoor use at f1/5 without blowing highlights:
(NX10)
See also related notes:
- Использование объективов M39x1 на цифровых камерах (2022-05-18)
- Гелиос-40 (85/1.5) и бленда (2022-05-14)
Image albums:
2024-05-28
Shaman Stone, Angara River (February 2005)
Lake Baikal, the source of the Angara River, the Shaman Stone, February 2005.
Pentax *ist Ds (1.5x crop factor, 6MP) + unknown manual focus lens (looks like the Jupiter-37AM 135/3.5)
2024-05-27
Albums: Other album for image
There is my very simple image hosting (so called "Albums" at https://malykh.com/album/). A single image can be in multiple albums.
I have updated "Albums" and now links to other albums are shown for such images.
2024-05-25
ISCO Iscovitar 50/2.8: Samples [1] - FF - f/2.8
Photos taken with the Sony a7c (FF, 24MP) and the ISCO Iscovitar 50/2.8 at f/2.8.
Because the lens focuses by rotating and moving only the front optical element, it doesn't produce a "classic" triplet image with "soap bubbles" and so on. And some soft focus effect is visible.
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Image albums:
2024-05-24
Panasonic Lumix S9: Full-frame camera + 26/8 lens
The Lumix S9 is Panasonic's all-new full-frame mirrorless camera.
It is quite small (for the digital full-frame world), but there is no EVF and no mechanical shutter.
But there is IBIS. And a fully articulating screen.
The new Panasonic S 26/8 lens is strange for today.
It has manual focus and no aperture control. But I think it is a lens for fun. And its focal length is obviously a "tribute" to a [main] camera of mobile phones.
Is the f/8 too slow? For example, the modern mid-range Google Pixel 8a has a main camera with an equivalent focal length of 26mm (yes!) and f/1.89. Its sensor size is 1/1.73, 4.7x crop factor. So the equivalent aperture is about f/8.9 (1.89 * 4.7).
Or, f/8 of FF is equivalent to f/4 of M4/3.
By the way, I would buy a similar lens for the Sony FE mount for a reasonable price. I tried the Brightin Star 23/5.6, but it is a junk lens with poor build quality. I also had the Holga [NX] 29/8, it was a very fun lens almost for free. But it is about f/20 instead of (stated) f/8 because of the two apertures. And the Holga is for APS-C, so it is a normal focal length (not a wide angle) lens.
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Image albums:
2024-05-23
Suzuki N32 (Grand Vitara JB632W) ECM pinout
The ECM pinout for the the Suzuki N32A (V6 3.2 liter) engine. I found it in a service manual for the Suzuki Grand Vitara JB632W. I hope to use this pinout to start the 33910-79K00 control module.
Version 1:
Version 2:
2024-05-22
Holga HL(W)-SSN 29/8: Samples [1] - APS-C
Photos taken with the Samsung NX10 (1.5x crop factor, 14.6MP) and the Holga HL(W)-SSN 29/8 (there is no aperture control).
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