Re: Hermagis Serial numbers Need your help with a database
Quote:
Originally Posted by
Steven Tribe
Perhaps you could look inside the barrel to see whether there is a black backing paper strip around the inserted geared track? Or signs that has been one there in the past - and unblacked brass section where the paper used to be?
And lens glass diameter is?
Steven, this lens is not mine, I found these pictures on a blog. The geared track is missing. Here is the link.
Quote:
Originally Posted by
Amedeus
Agreed that this is somewhat of a assumption changer.
The lens clearly says "Brevet d'invention" ... question now is, which invention ? The 1856 ? That would be hard to believe as this would suggest an enormous output. What there another brevet/patent prior to 1856 ? Or was this simply bluff ?
Rudi, one more interesting thing with this lens is the barrel was cut into two pieces and can joint together by screw threads. You can find the details thought the link above. Not sure it was factory cut or cut by users.
Re: Hermagis Serial numbers Need your help with a database
Of course, the patent engraving changes everything!
I assumed it was a simple barrel as you would have discovered it (if you had it in your hands!). It is the standard make up for the convertible, which is just about impossible to make from a standard barrel and, anyway, a later modification would have gone for a WHS solution.
It appears to have lost the track, lens hood and the internal stop frame system - a troubled life indeed. The serial number doesn't match with 1856 patent date. Unless it was something produced before the patent date as part of development work or patent application. But then it shouldn't have the patent "boast" engraved.
The final problem is that it can't be an added serial number as all known convertible Hermagis Petzvals did have a serial number ex-workshop. Could be an example of a 5 digit serial number which has "lost" the last digit?
WHatever, I'll edit the table again (#20) to reflect uncertainty - which effects the other odd number.
Re: Hermagis Serial numbers Need your help with a database
This is most likely a #9 convertible based on focal length and diameter of the barrel at the rear.
I took the liberty to have the link from lucaas translated and for what it is worth, this is what the writer states. Some comments added.
"It is very old HERMAGIS with serial number 2163. There is a theory that HERMAGIS Inc. was founded in 1845. Once in 1854 the stamp of DEROGY et HERMAGIS can be seen, but then we will return to HERMAGIS again. There is a document that 8745 is manufactured in 1862, so on average it seems that we produced about 500 lenses a year. From this, it can be inferred that lens No. 2163 is manufactured around 1850."
"I read a handwritten F = 13.5 under the engraving. This is thought to be a note by the former owner of the focal length."
"If you attach the rack and pinion gear down to the camera, the engraving will turn upside down. Moreover, the engraved mark becomes hidden because it is hidden by the knob. Furthermore the shaft of the knob is very long."
"Disassembled view. The inner lens barrel can be divided into two. I saw this for the first time. The optical system is an ordinary Petzval. There is no diaphragm function at all."
"The lens is handwritten with Hermagis in pencil."
"A two-part barrel. Since there is no aperture, there is no need to split here. Perhaps I wanted to narrow the inner diameter slightly here and want to reduce internal reflection." ---- the writer is clearly not familiar with the convertible
"Screw the two-piece lens barrel together and it will fit at the position of the rack gear exactly. The rack gear itself is lost.
What a wonderful thread cutting technique! Although I was impressed, I think I would cut the groove for the rack gear afterwards. Probably initially it was a lens with neither diaphragm nor focusing function, but I think that a rack and pinion gear was added later" --- see my remark above.
"Since the flange is lost, a 52 mm step-up ring is glued" --- writer mounts the lens to a 52mm helicoid for use on a DSLR, this and the focal length most likely indicates that this is a #9 convertible with a lens diameter of ~44mm.
"The orientation of the characters of the engraving is also strange. It is obvious to concluded the pinion gear was added without thinking about engraving. The overall look is much like the lens manufactured by Voigtlander in Wien in 1851."
cheers,
Re: Hermagis Serial numbers Need your help with a database
Quote:
Originally Posted by
Steven Tribe
Added to the list. There are quite a few years in the 1870's after this one (1874), where we still have holes and, perhaps, low annual productions. Could this be due to Dallmeyer's Patent Petzval becoming popular?
This update relates to post #54
The new owner of this lens confirmed the lens diameter (79mm visible, 81mm diameter) and the focal length of 210mm. This makes it a F:2.7, not part of the typical list we use for the convertibles. So looking at all the lists I have for Petzval types from Hermagis, I can only find this configuration in the Serie Nr II from around 1900. There's a #6 which is 210mm at F2.7.
Only thing to conclude is that a list is just a list and that specials or prototypes were made as far as we can assume now.
Cheers,
1 Attachment(s)
Re: Hermagis Serial numbers Need your help with a database
Have new acquisition
Hermagis Eidoscope No.1 with serial No 516402
Regarding the number I guess it is one of the last Eidosopes made by Hermagis before change to SOM Berthiot. Anyway have no clue how old is that. Now I need to get flange replacement and happily looking forward to take first photo
Attachment 178773
Re: Hermagis Serial numbers Need your help with a database
1950ish. I have a No.3 (527494) just after the change and a No. 2 just before (510948.) The 1950 Som Berthiot catalog shows a Hermagis labeled Eidoscope No. 3 with serial number 516721.
Re: Hermagis Serial numbers Need your help with a database
Hermagis 13864 is already mentioned in the #20 post list as a convertible but just confirming the rear lens is marked 1867
It's a #6 to be clear, 70mm diameter glass.
Cheers
Re: Hermagis Serial numbers Need your help with a database
The original list was posting #20. This is now removed so it not found by a search.
Early Lenses engraved Hermagis do not have a serial number and in modern auctions are often described as “projection” lenses as there is no apparent means of adjusting the aperture. There are 5 lenses known without serial numbers (portrait Petzvals). However, there must be many more of these serial numberless Hermagis. The chosen start of Hermagis serial numbers (around 6100) can be explained by these earlier “anonymous” and the lenses made at the establishments which Mons. Hermagis was an active Partner.
VVVV no brass serial number. Many numbers on achromat and rear cell. Very nearly same numbers as on achromat YYYY. Fitted with “original?” Internal washer. Longer focal length than YYYY due to longer rear cell. No.9.
XXXX no brass serial number, "12 cent" on rear convex/concave. no. 7 plain Petzval. Blackened paper behind rack.
YYYY no brass serial number. Many numbers. no. 9 plain Petzval. Blackened paper behind rack.
ZZZZ no brass serial number, lens edges not seen- missing rear cell. size no.6?. blackened paper behind rack.
WWWW no brass serial number. Plain Petzval no.9
3670 early number noted by P et P. The photograph shows this is a modified sleeve. The pinion has been moved to the other side of the sleeve and the WHS cut-out has been made where the pinion was mounted. It appears the sleeve was originally as XXXX, YYYY etc.
Start of Serial numbers. 6285 ( and 7010) are engraved with the granted Patent, which was in July 1856. So 6285 cannot be before 1856. I venture to suggest that comprensive serial number engraving was begun at the same time this was granted. Derogy also had a patent granted in 1856 (multiples foyer) and onLy a single convertible lens is known without a serial number. So it looks like ex colleagues Derogy and Hermagis started serial number identification at the same time.
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(2163) Small Convert. Petzval no data on lens,patent engraving - impossible serial no.?
(3670) P et P image plain Petzval
6285 many digits, but no date - barrel engravings. Convertible
6872 digits but no date. barrel engraving Convertible#
7004. no date but signature on lens - sleeve engraving. Convertible
7010. P et P illustration p.8 - barrel engraving. Convertible.
7117. EBay listed March 2021. Plain Petzval
7242 many digits, but no obvious date. Convertible. No. 4.
8077 mange digits, no obvious date
8154. only hermagis on achromat. address and 1859 on rear. no.3 convertible
8268. catawiki auction huge ordinary Petzval with bayonnet rear pair
8745. D'Agostini
8893. Small Petzval U.K. auction 2020 lost hood
9277 Convert no.7
9283 Convert. No. 5. Rear cell lost. Only “Hermagis” in pencil on achromat. Not altered for WHS
9305 P et P
9335 Convert. no. 4
9342 Convert. ebay 2019
9787 Ebay january 2018 Convert. no.4. turner/Finisher names initials. No numbers.
9804. D'Agostini
9888. Convertible size (private info)
10251 P et P
10376 convertible medallion size 6 WHS _ track only on lower barrel.
10417 Ebay august 2017 large convertible sleeve engraved
10776. P et P
10922 D'Agostini
10981 Has dated lens edge in correct style 1874 Replacement? no. 5 convertible
11228. ebay june 2017
11272. P et P. stereo
11290. #7 ordinary portrait Petzval no WHS conversion.EBAY SALE March 2023 Hood and aperture insert gone.
11824 Breker auction
Start of dating of lenses?
12417 GermanLF forum larger CdV size
12421. P et P
12448 Ordinary Petzval with hood insert eBay jan2022
13240 1867
13657 1868
13864. 1867 70mm lens diameter #6 size convert
13995 1867
14098 1868
14444. 1868. convert.
14659. 1868
Franco-Prussian war!
15067. 1872
15463. P et P
15505. 1872
15512. 1873
15744. 1873
15838. no date. plain fast petzval. 180mm (No. 8?)
15904 1878 Replacement ?
15971. 1874
15974. 1874
15988 1874 dated on front and rear lenses SeriesII
16215 1875
16457. 1876
16723. 1876
16784. 1876
16944. 1876
17025. P et P
18635 1880 These two lenses suggest that there may have been a stock of lenses with
18702. 1883. their completion date added, but serial numbers were added later.
19411. 1884. Large plain Petzval
22071. 1888 plain Petzval
24312. (1)891 These are the final digits in a long series. Matches with production levels - of the late 80's early 90's.
27564 (18)92 No.7 series 1 fl 210
31912. (18)97 Large extra rapid series II Petzval
36099. (19)06. Another large extra rapid Series II Petzval.Size no.1. Used in a Spanish studio together with a very large Voigtlander Cooke triplet which is still keeping it Company (2023).
53360. (19)13. No.4 extra rapid. Series II Petzval
BOLD serial numbers are those added in 2019. Thanks!
The remaining 6 are from the 20th century.
It is obvious that the P et P table is very wrong about a serial number of 12,000 in 1870
Re: Hermagis Serial numbers Need your help with a database
Plain Hermagis Petzval 22071 from 1888 ... no balsam in the front achromat but curvature is a match when properly aligned. Lens diameter 61mm.
No paper over the track but a relatively hard waxy substance around the track.
Cheers,
Re: Hermagis Serial numbers Need your help with a database
I have seen one other Petzval ( GAsc et Charconnet - 3rd series Objectif Simplifies) without balsam. I assume it is a half finished attempt at balsam replacement. Will probably work OK as it is or with a suitable oil!