C.P. Goerz
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- The serial number is 140390. Does anyone know of a site or other source which provides a cross reference between Goerz/Dagor serial numbers and year of manufacture? Right now I know that it is between 1892 and 1904. Kadhal Rojave Mp3 Song Download. The lens was finally completed on September 23rd at 3.47pm 1903.
The positive lens can be either a conventional prime lens such as a Tessar or Protar, or a specialist group called the Tele-Positve. Some tubes had iris diaphragms and shutters fitted. This example is a Tele-Negative attachment in a tube with removable focusing mount. The likely positive lens would have been a Tele-Positive of 135 mm focal length. Numbers of serial production of binoculars of Optische Anstalt C.P.GOERZ - Berlin. The lens was finally completed on September 23rd at 3.47pm 1903. The final optical bench test was given by Otto Plankshaft who deemed it above average and gave it his stamp before it was sent to the shipping department.
Berlin
Germany
Series III No.4. f7.7, 240 mm
Lens Type:
Anastigmat. 6 elements.Iris diaphragm marked in Goerz scale 6 - 384 (f8 - f64). Brass mount. For whole-plate.
Serial Number:
16411 (c. 1893) .Ross & Co.
London
England
Series III No. 1. f7.7, 6'
Lens Type:
Anastigmat. 6 elements.Waterhouse stops. Brass mount. For 5' x 4'
Serial Number:
1089 .The Goerz Double Anastigmat was designed by von Höegh and introduced in 1892, from 1904 it was known as the Dagor. It proved very successful and was widely copied. The series III is a general purpose lens working at f6.8 in the shorter lengths and f7.7 in longer lengths. Available in sizes of 1 ⅝ - 35' (in the UK in 1900). The series IV was a modified design for copying and architectural use, working at f11 it was introduced in sizes up to 47'.
The Ross-Goerz lenses were made under license by Ross in London from 1893, they were replaced by Ross designed lenses in the late 1900s.
References & Notes:
BP 23378/1892. BP 21458/1894. BJA 1894, p. 53. BJA 1900, pp. 62, 379. BJA 1905, p. 377. N&G Cat. 1908, p. 72. Neblette, Principles and Practice, p. 115. Kingslake, p. 90. Abney, Instruction, p. 96. DRP 74437/1892.W. Watson & Sons
London
Goerz Lens Serial Numbers Doreen
England
Series 1a. f4.6, 6 ⅛'
Lens Type:
Anastigmat. Reversed Dagor type. Dividing/combinable. 65° angle.
f4.6, 6 ⅛' combined; f8.5, 10' front and back groups. Iris diaphragm, two scales to f32 (combined lens) and f64. Sunk mount. For 5' x 6'.
Serial Number:
2375 .With:
Flange.The Holostigmat, designed by Conrady, is a combinable lens sometimes sold in sets providing several focal lengths.
The original model, series I of 1901, had an aperture of f6.1 and focal length of 4 - 12' when introduced, later increased to 20'.
This was followed by the series II at f8 in lengths 4 - 26 ½'.
The Ia, c. 1906, was faster at f4.6 with lengths of 4 ⅜ - 14 ⅔'.
Around 1906 a wide-angle model was introduced with lengths of 3.9 - 9.2'.
Lastly a series III for process work was introduced in 1911. This had an aperture of f9.5, later f9, and lengths of 11 ¼ - 26 ½'.
The series II was discontinued in the late 1900s the other models with reduced focal length range were produced into the 1930s.
References & Notes:
BJA 1902, p. 1167. BJA 1903, p. 963. BJA 1905, p. 1200. BJA 1907, pp. 884, 1190. BJA 1908, p. 755. BJA 1912, pp. 722, 932. YBP 1901, pp. 549, 608.A.E. Staley & Co.
London
England
Series IV. f6.5, 4 ¾'
Lens Type:
Air spaced Dagor.Iris diaphragm to f44. Magnalium mount. For 3 ½' x 4 ¾'.
Serial Number:
10273 .Developed by E. Arbeit in Germany, introduced by Staley in November 1907.
References & Notes:
BP 2305/1903. BJA 1909, p. 16. BJA 1912, p. 6. DRP 135742. Kingslake, p. 94.I recently acquired a lens that is labelled: 'GOERZ DAGOR F:6.8 FOCUS 9 1/2 IN. No.222689' Can anyone identify what type of Dagor it might be and when it was produced? I've looked all over the WWW and can only find a 222*** Goerz series that appears far too old for this particular lens. The lens is coated but not multicoated and there is no country of origin marking on the lens it is in an Alphax shutter. It belonged to a photography professor in Rochester and it seems like a pretty nice piece of glass. The shutter would not be the orig.
Sanders is right: This lens is far too old for original coating and dates from anywhere between ~1906 and 1910; the shutter is at least 20yrs younger, likely a 1940s model. Re: 'What type of Dagor'?Just the 'normal' one., i.e. , or 'Gold-Dot,'.: This 72 degree Dagor (90 degrees at f 32) was sold as a 6.5x8.5' lens (wide open) which was however supposed to be able to cover 11x14' (!) at f 32.(Goerz 1913 catalogue). So, as a collectors item it ain't worth much, but that doesn't mean it can't be used to take nice pictures, which is also dependent on the shutter re-mount job, as cell spacing was critical with dagors. Thanks Thanks Everyone for your kind responses. I tend to agree with Phitz that this lens is likely from the 1950s and not the earlier part of the century. If B&J used their own serials, this might explain the variance and confusion.
Goerz Lens Serial Numbers 222
The Holmes, Booth & Haydens lens above, is also marked 'Patented June 7th, 1859.' 'The Lens is almost 22' long including the shade. While on the subject of 'diffusion' or 'depth 'of focus it may be remarked that a delusion on this point is cherished by a vast number of photographers. For this the. On Goerz Serial numbers and dates. (former Goerz Tech.) Lens # 35 1902-1903 170 1903-1905 267 1906-1908 230 1908-1909 334 1911 -1914. Date of CP Goerz Double Anastigmatic (Dagor) Lens. Goerz Optics I. Introduction II. In 1942 the Goerz lenses. “Estimated numbers of serial production of binoculars of Optische Anstalt C.P.GOERZ - Berlin Serial. Goerz Optics I. Introduction II. In 1942 the Goerz lenses. “Estimated numbers of serial production of binoculars of Optische Anstalt C.P.GOERZ - Berlin Serial. Based in Berlin, Germany, C. Goerz was a manufacturer of lenses and cameras beginning in 1888. (see here for dating these serial numbers).
This is certainly not a 90 year old lens. Recently, when I had the lens CLA'd they advised that the coating is beginning to degrade slightly. I'm sure this is an after-production coating either from B&J when remarketing or from Goerz. Fbi 4600 Dl Installation Manual. The lens will be used for 8 x 10 black and white mostly and I plan to get to know it well once my bellows returns from Western Bellows. Thanks again.
Click to expand.It's definitely not one of the infamous B&J 'Berlin Dagors'. Those lenses were assembled using old, loose, and often poorly matched, elements of dubious quality. They were sold by B&J as new 'Berlin Dagors' and did not contain the word 'Goerz' anywhere on the lens. If they would have, they would have been sued to high heaven by C.P. Lenses made in Germany prior to the German Goerz being absobed by Zeiss-Ikon (ca.
Goerz Berlin Lens Serial Numbers
1926) are labeled: 'C.P. GOERZ BERLIN'. Lenses made in Germany after the Zeiss merger are labeled: 'Carl Zeiss Jena' and 'Goerz-Dagor'.
Lenses made by the American Goerz company were engraved with a number of different designations over the years. The lens shown above is definitely a pre-WWII US made Dagor. The simple 'GOERZ DAGOR' was the engraving style they used at that time.
Later, possibly post-WWII, perhaps a little earlier (I'd have to comb though old catalogs to nail down a date), they switched to labeling their lenses 'C.P. GOERZ AM.OPT.CO'. This designation remained until around 1963 or 1964 when they changed the company name and labeling to read' 'GOERZ OPTICAL CO. And then there were the later Kern made Dagors during the Kollmorgen (early 1970s) and Schneider (1970s and early 1980s) years. Those are easy to tell as they are all labeled 'Lens made in Switzerland'. There may have been other permutations, especially in the very early years of the American Goerz company, but those are the main ones I know of off the top of my head. As I stated above, any Dagors assembled from loose elements by Burke and James are labeled as 'BERLIN DAGOR' absent the word Goerz.
The specific lens pictured in this thread is definitely decades older than the shutter it is presently mounted in. As others have stated, the shutter is not original. It's definitely a remount. Also, the date of manufacture of the lens pre-dates commercially viable coating technology by many years. So, if it is coated (it doesn't look like it is in the attached photo, but it's impossible to tell for sure form a small jpeg image), it was coated years later - possibly at the same time the lens was mounted in the shutter.
If it was retrocoated, the coating (and shutter mounting for that matter) may have been done by B&J. It may have been done by C.P. Goerz AM Optical, or maybe someone else. I have seen genuine Goerz lenses that were retrocoated by B&J.
I've even seen one in a box that contained a little slip of paper stating that it had been coated by Burke and James. Although coating reduces flare and increases contrast, uncoated Dagors are perfectly usable. The Dagor is a cemented design. So, it only has four air:glass interfaces (compared to an Artar or WF Ektar that have eight air:glass interfaces and benefit much more from coating). Click to expand.Ian, Thanks for the info. That date, right around the beginning if WWII seems about right for when the American Goerz started labeling things 'C.P. Stood for American.
The original C.P. Download Detective Conan Movie 13 The Raven Chaser Sub Indonesia here. Goerz was obviously a German company, and Goerz is a very German sounding name. So, here in the states, at that particular time in history, it would have been very wise from a marketing standpoint to make sure your potential customers knew you were an American company and proud of it. I also have what appears to be a pre WWII GoerZ Am. Optical Dagor, that is coated.
Goerz Lens Serial Numbers
The inscription on mine reads Goerz Dagor, F:6.8, Focus 12 in., No. Mine is in an early Acme shutter. Any idea when this lens was made? There is a big gap in the listed Goerz serial numbers between 320000 (1918) and 751240 (1927). And if Burke & James were coating older Goerz Dagors.
How would they have done the actual coating? Coated the existing cells as they were, or de-cemented the cells, coated the outside elements and re-cemented the three elements in each cell?