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Photo Forum / Film Photography / Darkroom / August 2005Bulb for Osram Duka-50 safelight?
I just got one of these lights from that big auction thing... It's quite a nice light, but I can't find any particulars about the bulb anywhere, at least following a bunch of links from Google. The best I get is that it's expensive and hard to find. Nothing useful on the Sylvania site. Does anyone know? Thanks. Steve > I just got one of these lights from that big auction thing... > [quoted text clipped - 7 lines] > > Steve You have a Kaiser product that was made for Osram. it is currently sold by Kaiser and we normally have spare tubes in stock. They are VERY expensive. The proper order code is 204222 Spare 10w Sodium Vapor Lamp $227.90 list.  SignatureTo reply no_ HPMarketing Corp. >> I just got one of these lights from that big auction thing... >> [quoted text clipped - 13 lines] > >The proper order code is 204222 Spare 10w Sodium Vapor Lamp $227.90 list. Thank you Bob! At that price, I'll probably just use it until it dies. Luckily it still works and was only $20! > At that price That price is the List Price. Your camera store would discount it. SignatureTo reply no_ HPMarketing Corp. >> I just got one of these lights from that big auction thing... >> [quoted text clipped - 13 lines] > >The proper order code is 204222 Spare 10w Sodium Vapor Lamp $227.90 list. I am a little surprised that the list price is so high. I doubt Kaiser makes this lamp (I'm guessing Osram). For comparison, the lamp for the Thomas safelight is available for $80 from the big NY retailers, so I'm sure its list price must be well under $228. I doubt that, even with discounting, I could get a spare for my Duka for anywhere near that. Perhaps if spare lamps for the Duka50 were less expensive more people might actually purchase this fine safelight, or try to keep theirs going after the original lamp fails. I realize you don't necessarily have a say in the list price... Steve > Perhaps if spare lamps for the Duka50 were less expensive more people > might actually purchase this fine safelight, or try to keep theirs going > after the original lamp fails. No. Volume would reduce the price and the darkroom market is not exactly a growth area these days. The first thing Osram did before stopping the distribution of the Duka series and giving it back to Kaiser was to greatly increase the cost of the lamp. Perhaps the Thomas people bought a large quantity of lamps at some time in the past so they can still pass on the savings Kaiser didn't buy theirs until they needed them. But the Thomas is quite a different system from the Kaiser. The Kaiser does not have to hang down from the ceiling, the Kaiser is a direct rather then an indirect system and the system is quieter (no whistle or hum). No filters have to be purchased as all come with the Kaiser and the tube Kaiser uses does not effect color paper. The tube is a newer design and is made by a different manufacturer. SignatureTo reply no_ HPMarketing Corp. >> Perhaps if spare lamps for the Duka50 were less expensive more people >> might actually purchase this fine safelight, or try to keep theirs going >> after the original lamp fails. > >No. Volume would reduce the price and the darkroom market is not exactly >a growth area these days. <snip> You're right, of course. I was thinking more along the lines of keeping these nice units in series and out of the waste stream when the bulb burns out. But if Osram is sticking it to Kaiser on the bulb, there's not much to be done. I realize you're not running a charity. Steve > No filters have to be purchased as all come with the Kaiser and > the tube Kaiser uses does not effect color paper. I'd suppose it does not affect color IF one of the supplied filters is installed. I think perhaps sodium vapor lamps came into wider use with the increasing popularity of VC papers. Many old hands accustomed to the high light levels of a Graded paper darkroom could, with the sodium, maintain some semblance of their previous well lite darkrooms. Dan > > No filters have to be purchased as all come with the Kaiser and > > the tube Kaiser uses does not effect color paper. [quoted text clipped - 7 lines] > semblance of their previous well > lite darkrooms. Dan Dan, it comes with a white diffuser and a red add on filter for color. The tube used emits light at a wave length color paper doesn't see. The red looking filter is for use with VC papers. That was the reason why Kodak recommended it for use in color movie processing labs. SignatureTo reply no_ HPMarketing Corp. >> > No filters have to be purchased as all come with the Kaiser and >> > the tube Kaiser uses does not effect color paper. [quoted text clipped - 14 lines] >That was the reason why Kodak recommended it for use in color movie >processing labs. Bob, Is it possible to get the white diffuser as a spare part? My Duka-50 came with the red filter only. This isn't really a problem as I work with VC papers these days, but it might be nice to have. I suppose I can always look for a unit with a dead bulb at the local photo shows. Thx. Steve > I just got one of these lights from that big auction thing... > It's quite a nice light, but I can't find any particulars about > the bulb anywhere, at least following a bunch of links from > Google. The best I get is that it's expensive and hard to > find. Nothing useful on the Sylvania site. Does anyone > know? If the bulb is dead, use the Duka-10 or -50 as paperweight. I recently bought the remains of a repro lab and got 8 Duka-50 lamps. Three were working, the rest flashed like a old flourescent fixture. These bulbs are made of unobtainium and are worth their weight in 24 carat gold... Mar"someone in need of 5 nearly working Duka-10 lamps?"tin Stephan Goldstein <sg0ldo1867@yahoo.com> wrote: > > It's quite a nice light, but I can't find any particulars about > > the bulb anywhere, at least following a bunch of links from > > Google. Would it happen to be a SOX10? http://www.lamptech.co.uk/Spec%20Sheets/GEC%20SOX10.htm SOX10 appears to be obsolete, but a SOX18 18W lamp is still made. SignatureNicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. To reply, remove spaces: n o lindan at ix . netcom . com Fstop timer - http://www.nolindan.com/da/fstop/index.htm > 18W lamp is > still made. No it is a 10W and Kaiser does have them. 204222. SignatureTo reply no_ HPMarketing Corp. > The best I get is that it's expensive and hard to find. I hear the same story. If you use Graded papers you can have the same high or even higher level of lighting using yellow or orangeish-yellow save lights. Dan >> The best I get is that it's expensive and hard to find. > I hear the same story. If you use Graded papers you > can have the same high or even higher level of > lighting using yellow or orangeish-yellow > save lights. Dan If you use multigrade paper, use a red savelight with flourescent tubes. These were standard in repro labs, they are extremly bright. My darkroom has one of these lamps with two 36W tubes behind a red filter, I can read the newspaper in every nook and cranny and it is possible to leave Agfa MCP for about 4 min in 1m distance of the tubes until the gradation starts to change. This gradation change is way more sensitive than just looking fopr more density, MCP will take about 10min of this red light until you can see any visual density. Martin |
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