Räuber
Well-known
@dexdog Thank you but the data in my spreadsheets are mostly in line with the data of Mr. Thieles Fabrikationsbuch II and III. Book II uses a lot of authentic CZJ production cards to give an insight into the production history of this time. I could not find any fault with this data of book II. But there is a small amount of batches where the production cards are missing. And then there are "holes" in this book. For some serials no record is in the book. What I found is that there are indeed some unrecorded batches where the card might be lost. I added what I found. And then there might be some mistakes in the book from collectors data. Mr. Thieles first editions heavily relied on collectors data. You still can find batches of those lenses in the current edition. For most of those batches the production card is missing and might be lost during time. There is a very small amount of those batches I would consider wrong. I added this too in my spreadsheet.
"My batch numbers" are the index of every batch found in Mr. Thieles books only: Index + production date + produced copies. One batch is one line in Mr. Thieles books. You can go to the chapter of the Fabrikationsbuch where all lenses are sorted by name and you basically get the same batch overview. I had some issues with batches not found in his books because what index to give them. I put them at the end of the index for now. The other thing that might confuse the order is the inclusion of R-Sonnar lenses.
My approach is the same as for most of other people collecting serials. I write down every serial of a Sonnar 5cm I can find. I try to write down what I know about this lens. The result is a pretty substancial overview of all Sonnar 5cm lenses showing up in the last 3 years. By sorting them over the serial you get a pretty good overview of all produced models / versions. And you get an overview of how many lenses show up for every batch. There might be some very small batches where no lens will show up. But if you have 1000 lens batches where even after this long time not a single lens is known then this batch might not exist at all.
I tried to collect all this data and hints to create a more complete picture for buyers, collectors and people interested in the history of Zeiss lenses. Or just for fun. For me it is interesting and I like to dig into this data to see what I can learn from it. 🙂
"My batch numbers" are the index of every batch found in Mr. Thieles books only: Index + production date + produced copies. One batch is one line in Mr. Thieles books. You can go to the chapter of the Fabrikationsbuch where all lenses are sorted by name and you basically get the same batch overview. I had some issues with batches not found in his books because what index to give them. I put them at the end of the index for now. The other thing that might confuse the order is the inclusion of R-Sonnar lenses.
My approach is the same as for most of other people collecting serials. I write down every serial of a Sonnar 5cm I can find. I try to write down what I know about this lens. The result is a pretty substancial overview of all Sonnar 5cm lenses showing up in the last 3 years. By sorting them over the serial you get a pretty good overview of all produced models / versions. And you get an overview of how many lenses show up for every batch. There might be some very small batches where no lens will show up. But if you have 1000 lens batches where even after this long time not a single lens is known then this batch might not exist at all.
I tried to collect all this data and hints to create a more complete picture for buyers, collectors and people interested in the history of Zeiss lenses. Or just for fun. For me it is interesting and I like to dig into this data to see what I can learn from it. 🙂
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