Quietness reached in later years [Kleinbild **DE572222**Dr.Rudolph-Pat.]
「院落」P5 35mm f2.7

2024.11.27

A tranquil worldview

　Since we cannot use names that are subject to trademark rights, we have decided to use a format such as "**DE401630**Dr. Rudolph-Pat." that clearly indicates the source of the data. We apologize for any inconvenience this may cause. - 2025.3.17

　Paul Rudolph believed that this design was the best, so he founded a company for this lens and spread the word about it until his death. The best design is one with a standard angle of view, but there are few good wide-angle classic designs, so I'm considering a focal length of 35mm first.

　Rudolf retired from Zeiss after a successful career, but returned to work after losing his fortune in the hyperinflation of World War I. However, he soon left Zeiss to work with Hugo Meyer in Dresden. This contract may have lasted for ten years, and exactly ten years after his collaboration with Meyer, in 1932, he founded his own company, "**DE572222**Dr.Rudolph-Pat.-Dienst am Kunden GmbH", located in Hanover, where his son had a summer home. The purpose of the founding was:

"Our aim is to distribute the **DE572222**Dr.Rudolph-Pat. photographic lenses based on the patents of Dr. Paul Rudolph in Großbiesnitz near Görlitz as widely as possible and to offer **DE572222**Dr.Rudolph-Pat. customers advice and supplies regarding the lenses and all necessary accessories. We carry out all photographic engineering work for our customers and are authorized to join similar companies."

　The vicinity of Görlitz refers to the Mayer company. The aim was to make **DE572222**Dr.Rudolph-Pat., developed by Mayer, widely known to the world. In order to spread the word about the superiority of **DE572222**Dr.Rudolph-Pat., it was also necessary to manufacture cameras. It was difficult to get camera manufacturers to adopt the lenses, so it was necessary to sell them as a set with the camera. The 4.5 x 6 medium format camera "Roland" is said to be the world's first rangefinder, and was equipped with a 70mm f2.7 Kleinbild **DE572222**Dr.Rudolph-Pat. lens (German patent DE572222).

　In the spring of 1935, the company moved to Berlin and changed its name to "Kleinbild-**DE572222**Dr.Rudolph-Pat.-Gesellschaft Dr. Winkler & Co.". It attracted attention when it was exhibited at Photokina that spring, but Rudolph passed away two days before the event closed. A few months later, the company name in advertisements was "Kleinbild-**DE572222**Dr.Rudolph-Pat.-Gesellschaft, Berlin" without Dr. Winkler's name, and when it was advertised as a "sports camera" at the Berlin Olympics the following year, the manufacturer was "Kamerabau-Gesellschaft Rudolph & Co. Berlin Charlottenburg", and it can be assumed that Rudolph's son was involved. Then, in July 1936, the company probably moved back to Hannover and changed its name back to the original, becoming "**DE572222**Dr.Rudolph-Pat.-Dienst am Kunden GmbH", and the company was dissolved.

　The Kleinbild **DE572222**Dr.Rudolph-Pat. was originally called Miniature **DE572222**Dr.Rudolph-Pat., so it can be said to be similar to the Makro **DE456912**Dr.Rudolph-Pat.. However, no cameras were made for close-up photography. For macro photography, the limit seems to be about 25cm. Four designs were left, and the last one was commercialized. The aperture is f2.7 and the focal length is 50mm, but the angle of view is equivalent to 35mm. It is thought to be an evolution of the Xenotar type.

院落 Yinraku P5 35mm f2.7 JPY ??0,000　No estimate given

Dedicated hood included. Filter diameter ?mm. Minimum shooting distance ?m. Aperture blades ?. Actual weight ?g.


　It's about 20cm from the tip of the lens. It's f3 at full aperture. You can get closer by narrowing it down.

　Paul Rudolph was convinced that this was the standard lens, and Leica's pursuit of the best lens has led to the same result. The APO-Summicron 50mm f2 has this lens configuration.

---

　Of the remaining three data points, we will also check the one that was listed alongside the design that was actually manufactured and sold. It is f3.8. It is likely a cheaper version with one less piece of glass. All other conditions are the same.

　The distance was 20cm from the tip of the lens and the aperture was open at f5.


　There are two older designs listed with the Makro **DE456912**Dr.Rudolph-Pat. (German Patent DE456912, British Patent GB261326, US Patent US1812717) which are f3.2.

　It is 20cm from the tip of the lens. The aperture is open to f4.2.


　The wide-angle f6 lens has a 90-degree angle of view. This may have been the Globe **DE456912**Dr.Rudolph-Pat., which was produced in limited quantities. The green line is the focal length of the 50mm Leica format.

　It is 20cm from the tip of the lens. The maximum aperture is f7.5.


Back

 Since 2012 Photo Cinema reproduct lens [Mu-Yichi-Kyo] is licensed under a Creative Commons 表示 4.0 日本 License.