Difference between revisions of "Bermpohl Naturfarbenkamera"
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| − | |image_text= | + | |image_text= 9x12 cm Naturfarbenkamera, with 22 cm f/4 lens |
| + | |image_by= Uwe Kulick | ||
| + | |image_rights= with permission | ||
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| − | The '''Naturfarbenkamera''' (natural | + | The '''Naturfarbenkamera''' (natural color camera) is a [[Three-color camera|colour separation plate camera]] made by [[Bermpohl|Bermpohl & Co., Berlin]] from about 1930.<ref name=EP>[http://www.earlyphotography.co.uk/site/entry_C480.html 13x18 cm Naturfarbenkamera] with 30 cm f/4 Doppel Plasmat, at [http://www.earlyphotography.co.uk/index.html Early Photography].</ref> It is wooden-bodied, with bellows focusing. It was made in three sizes, for 9x12 cm, 13x18 cm or 18x24 cm plates. The body of the camera is a rather curious shape. Inside, a system of beam-splitting mirrors divides the incoming light into three, projecting the same image onto three plates, arranged so as to have the same focus, enabling them to be exposed simultaneously. A red, green or blue filter is placed in front of each plate, so each captures, as a monochrome silver negative image, a single color component for a three-color printing process. Because contemporary monochrome plates were more sensitive to blue than to red, the strength of the color filters was biased to compensate. Different sets of filters could be used for different lighting.<ref name=EP /><ref>[https://www.leitz-auction.com/en/Bermpohl-Color-Seperation-Camera/AI-13-16801 9x12 cm Naturfarbenkamera] with 21.5 cm f/4 Doppel Plasmat and Compound shutter, reflex viewfinder, and daylight and flash color filters, sold at the [https://www.leitz-auction.com/en/Cameras/Past-Auctions/Auction-13/ thirteenth Westlicht Photographica Auction], in June 2008.</ref> Color separation photography was in use from early to the middle of the twentieth century, being replaced by color film photography later. |
| − | [[Category: | + | Several other makers made similar cameras. Bermpohl had previously made cameras for three-color photography by ''successive'' (i.e. not simultaneous) exposure of the three plates. These cameras are simpler in construction; there is no need for the internal mirrors, or more than one place to attach a dark-slide. |
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| + | ==Specifications== | ||
| + | *Type: Color separation camera | ||
| + | *Manufacturer: Bermpohl & Co., Berlin | ||
| + | *Medium: 9x12 cm, 13x18 cm or 18x24 cm plates | ||
| + | *Lens: f/4 [[Meyer]] Doppel Plasmat; about 22 cm for the 9x12 cm camera, and 30 cm for the 13x18 cm one.<ref>These lenses are usually seen: however an [https://www.leitz-auction.com/en/Bermpohl-Naturfarbenkamera/AI-7-24783 example with a Steinheil Unofocal and Compur shutter] was sold at the [https://www.leitz-auction.com/en/Cameras/Past-Auctions/Auction-7/ seventh Westlicht auction], in May 2005; it had probably been modified.</ref> | ||
| + | *Lens aperture range: f/4 to f/32 | ||
| + | *Shutter: Dial-set Compound shutter with speeds 1 - 1/50 second, plus 'B' and 'T'. | ||
| + | |||
| + | ==Notes== | ||
| + | <references /> | ||
| + | |||
| + | |||
| + | ==Links== | ||
| + | * [https://worldwide.espacenet.com/patent/search/family/007762698/publication/US1951896A?q=pn%3DUS1951896A US Patent 1951896] describing the Naturfarbenkamera, filed 1930 and granted 1934 to Wilhelm Bermpohl, at [https://worldwide.espacenet.com/ Espacenet], the patent search facility of the European Patent Office. | ||
| + | *[http://www.vintagephoto.tv/bermpohl_img.shtml Bermpohl Naturfarbenkamera page] at [http://www.vintagephoto.tv/index.shtml Scott's Photographica Collection] | ||
| + | |||
| + | [[Category: Three-color cameras]] | ||
| + | [[Category: 9x12]] | ||
| + | [[Category: 13x18]] | ||
| + | [[Category:N|Naturfarbenkamera Bermpohl]] | ||
Latest revision as of 00:02, 1 February 2024
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| 9x12 cm Naturfarbenkamera, with 22 cm f/4 lens image by Uwe Kulick (Image rights) |
The Naturfarbenkamera (natural color camera) is a colour separation plate camera made by Bermpohl & Co., Berlin from about 1930.[1] It is wooden-bodied, with bellows focusing. It was made in three sizes, for 9x12 cm, 13x18 cm or 18x24 cm plates. The body of the camera is a rather curious shape. Inside, a system of beam-splitting mirrors divides the incoming light into three, projecting the same image onto three plates, arranged so as to have the same focus, enabling them to be exposed simultaneously. A red, green or blue filter is placed in front of each plate, so each captures, as a monochrome silver negative image, a single color component for a three-color printing process. Because contemporary monochrome plates were more sensitive to blue than to red, the strength of the color filters was biased to compensate. Different sets of filters could be used for different lighting.[1][2] Color separation photography was in use from early to the middle of the twentieth century, being replaced by color film photography later.
Several other makers made similar cameras. Bermpohl had previously made cameras for three-color photography by successive (i.e. not simultaneous) exposure of the three plates. These cameras are simpler in construction; there is no need for the internal mirrors, or more than one place to attach a dark-slide.
Specifications
- Type: Color separation camera
- Manufacturer: Bermpohl & Co., Berlin
- Medium: 9x12 cm, 13x18 cm or 18x24 cm plates
- Lens: f/4 Meyer Doppel Plasmat; about 22 cm for the 9x12 cm camera, and 30 cm for the 13x18 cm one.[3]
- Lens aperture range: f/4 to f/32
- Shutter: Dial-set Compound shutter with speeds 1 - 1/50 second, plus 'B' and 'T'.
Notes
- ↑ 1.0 1.1 13x18 cm Naturfarbenkamera with 30 cm f/4 Doppel Plasmat, at Early Photography.
- ↑ 9x12 cm Naturfarbenkamera with 21.5 cm f/4 Doppel Plasmat and Compound shutter, reflex viewfinder, and daylight and flash color filters, sold at the thirteenth Westlicht Photographica Auction, in June 2008.
- ↑ These lenses are usually seen: however an example with a Steinheil Unofocal and Compur shutter was sold at the seventh Westlicht auction, in May 2005; it had probably been modified.
Links
- US Patent 1951896 describing the Naturfarbenkamera, filed 1930 and granted 1934 to Wilhelm Bermpohl, at Espacenet, the patent search facility of the European Patent Office.
- Bermpohl Naturfarbenkamera page at Scott's Photographica Collection
