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#111
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On 4/17/2005 10:56 PM narke spake thus:
"Power unit bad"? Come, now: he was complaining about the afterglow of the bulb after it goes off. Perhaps you know of a "power unit" that can somehow reach into the filament and instantly quench it at power-off? The super-metaphysical model, perhaps? The Obiwan Kenobe model? your argument is reasonable, but how do you explain that some guy on the list owning the same mode does not see the down-glow? and after replace the lamp for the gear, the glowing keep not going away? It's subjective. All incandescent lamps have some afterglow; it's a matter of how long one perceives that glow to be. What may seem like no time at all may feel like an eternity to someone else. on the other hand, in the duration of glowing, i noticed the color of light looks a little red, does this matter for color print in your opinion? Yes, of course, the color temperature changes as the bulb goes out. The question (the one I tried to address) is, how significant is this afterglow? My take on it is, not very. Remember that as the color goes red, it also gets very much dimmer. -- "I know I will go to hell, because I pardoned Richard Nixon." - Former President Gerald Ford to his golf partners, as related by the late Hunter S. Thompson |
#112
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On 17 Apr 2005 22:56:48 -0700, "narke" wrote:
"Power unit bad"? Come, now: he was complaining about the afterglow of the bulb after it goes off. Perhaps you know of a "power unit" that can somehow reach into the filament and instantly quench it at power-off? The super-metaphysical model, perhaps? The Obiwan Kenobe model? your argument is reasonable, but how do you explain that some guy on the list owning the same mode does not see the down-glow? and after replace the lamp for the gear, the glowing keep not going away? on the other hand, in the duration of glowing, i noticed the color of light looks a little red, does this matter for color print in your opinion? As I've said, mine exhibits the afterglow for less than 1 second. it does NOT affect either b&w or color prints in any way. When I first got the enlarger & noticed the afterglow, I was mildly concerned. But after making prints and seeing no effects of the afterglow I just ignore it. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Retired Shop Rat: 14,647 days in a GM plant. Now I can do what I enjoy: Large Format Photography - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
#113
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"Nicholas O. Lindan" wrote in message link.net... Come on, John -- it's a matter of eyesight. Perhaps we should repeat the sentence: make a 20 second exposure, cover the other half and make 20 two second ones. And no, before you ask, "20 two second ones" should not be read as "a 22 second one". Stop it already. I'm talking of multiple exposures one might make in burning. For example, ten 5 to 10 second exposures. You are being evasive, my friend. |
#114
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"jjs" wrote
"Nicholas O. Lindan" wrote in message Come on, John -- it's a matter of eyesight. Perhaps we should repeat the sentence: make a 20 second exposure, cover the other half and make 20 two second ones. And no, before you ask, "20 two second ones" should not be read as "a 22 second one". Stop it already. I'm talking of multiple exposures one might make in burning. For example, ten 5 to 10 second exposures. You are being evasive, my friend. Yeah, "ten 5-second exposures"-jjs, as in "twenty 2-second exposures"-nol? Dang fool: I am agreeing with you and you keep telling me I'm wrong. This is a new height in argument for argument's sake. -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. To reply, remove spaces: n o lindan at ix . netcom . com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/ |
#115
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Got answer from Omaga. Just FYI:
--cut-- 1) No this is not normal. It may be a relay on the circuit board in the Chromegatrol. If the cover of the Chromegatrol is removed, between the two timer knobs on the board, there is a 1 inch square box connected to the board. This relay is mechanical and the contacts get stuck and cause the lamp not to turn off. This is connected to the board via 7 solder contacts. The replacement relay is $25.00 plus $10.00 for freight (our minimum charge). 2) To mount a Rodagon lens a 421056 lens disc is needed. This is a flat threaded mount that is used on the slide in mount or the three lens turret. When used on a turret, a lock ring may be needed between the lens and the disc (as a spacer) to give enough clearance for the lens to turn. This only applies if the rear element of the lens protrudes beyond the rear thread. -----Original Message----- From: Steven Woody ] Sent: Monday, April 18, 2005 11:09 PM To: Bob Smrcina Subject: Question about D5 Thanks for your reply. Q1: A used D5-XL Super Chromega Dichroic Enlarger which has a up/down glow phenomenon, that is the lamp will not cut off as soon as the power supply was cut off by the Chromegatrol, it will quench in a duration of about 1 to 2 seconds. Is it normal? Q2: Can the D5-XL Super Chromega Dichroic use Rodenstock Rodagon 50mm enlarger lens (with or without the lens turret)? I heard there are some problems with the lens respect to some models of D5 serials. --cut-- |
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