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#1
September 24th 06, 07:37 PM
posted to rec.photo.digital.slr-systems
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Old Flash unit and New DX 50
Sorry if this has been asked a thousand times before --
I have an old "multi dedicated" flash units from my "olden" days...... It has a setting for Nikon cameras on it......Is it possible to have it working with the Nikon DX50 ? The unit works fine but I don't want to damage anything by connecting them together. Thanks again... Dave  
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#2
September 24th 06, 08:55 PM
posted to rec.photo.digital.slr-systems
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Old Flash unit and New DX 50
According to DB :
Sorry if this has been asked a thousand times before -- I have an old "multi dedicated" flash units from my "olden" days...... It has a setting for Nikon cameras on it......Is it possible to have it working with the Nikon DX50 ? The unit works fine but I don't want to damage anything by connecting them together. O.K. I don't know the DX 50 -- is this a new version of the D50? In any case -- plain auto exposure will probably work, but not TTL auto exposure -- because of differences in reflectivity and diffusion between film and the sensors. TTL depends on light bounced off the film, and even a camera like the NC2000e/c (Nikon N90s with a digital back from Kodak) won't work with the TTL metering for that reason. Nikon did not even *try* to make it work with their DSLRs. Instead, they have a new system, which uses a pre-flash for metering just before the actual exposure to control how much the flash unit needs to put out before quenching the flash. (IIRC, Nikon called this new system ITTL). Another consideration (and the one which relates to the possible damage) is the voltage present at the flash sync contacts. IIRC, the D70 specifies a maximum voltage of 250V positive, or *any* negative voltage without damage to the camera's flash sync circuitry. If you have a voltmeter, you should verify what the flash unit places on the sync terminals. You will probably also need an adaptor to provide a PC contact, unless your flash units have a flash shoe which is compatible with the Nikon ones. Good Luck, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero ---
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