Hello,
I wrote this little article for a local photo forum in spanish and thought you may be interested if I translate it. Let me know if this is useful of if there is any error or correction in my research.
Background History: In 1972 Kodak introduced the 110 format. The film was in a convenient and easy to use cartridge. The resulting negative was 13x17mm. Far smaller than 35mm but good enough for up to 8x10 prints, and sometimes pushed to 11x14. This format became popular in the 70's and it is still manufactured today, but getting hard to find.
In 1978 Pentax surprised everyone by launching the first and only interchangeable lens SLR in 110 format. There were other SLRs in the 110 format but with fixed lenses.
Presenting the Pentax auto 110: The world's smallest SLR.
Pentax launched this equipment as a complete system including the body, 3 available lenses initially (18mm, 24mm, 50mm), dedicated flash and power winder, along with other accesories like filters, hoods, cases etc. Due to its size and optical design, the 24mm was the "normal" focal distance, the 18mm a wide angle and the 50mm a telephoto equivalent to a 100mm in 35 mm film. The ratio was 2:1 compared to 35mm, similar to the 1.5~1.6:1 today in APS-C DSLRs.
All lenses were f2.8 due to the aperture blades located in the body, not the lens. The light metering was TTL and quite sophisticated for the time. TTL allowed the use of filters without any compensation needed. Shutter speed and aperture were automated via PROGRAM mode from 1s to 1/750s
In 1980 a smaller optional flash was launched but the original one remained the standard.
In 1981 3 additional lenses were launched: 18mm Pan focus, 70mm, and 20-40mm zoom.
In 1982 the updated auto 110 Super was launched with additional features like self timer and exposure compensation.
Production stopped around 1985.
According to some experts, this is the closest a photographic equipment can get to a real human eye in terms of size, aperture, FOV etc.
My specimen:
Thanks to ebay, I found this in a box of "Photographic junk"
Really dirty but seems to be complete. Fortunately the lens cap seems to be protecting the lens for years. The camera has a roll inside alredy by frame #15. I wonder what's in it!
After a good dose of TLC, I fixed the loose flash and it works perfectly. The winder had some corrosion in the contacts but after careful disassembly, cleaning and reassembly it works perfectly as well, but the battery cover is loose: a typical failure due to broken tabs. With the care of an archeologist the body was cleaned, removing years of grime.
At the end: A unique camera in perfect working order. Even the flash cover was found in the box.
The winder makes no sense to me. The manual lever is faster, quieter and simpler. It just makes it bulkier and heavier, detracting from its original purpose.
Some may think it is a toy or a scale model
What do you think?
Thanks,