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Mamiya M645J: Hot Shoe Cover & PC Sync Socket Cover
The M645 manual recommends (in several places) that
in order to avoid electrical shock: if one is using a flash connected via the hot shoe on top of the finder, then one should put a PC Sync Socket Cover on the PC sync socket; if one is using a flash connected via the PC sync socket, then one should put a Hot Shoe Cover on the hot shoe on top of the finder. IIRC, the manual does not address the case of not using the flash at all. I presume that using both at once would be absurd, not to mention harmful to (at least) the equipment. My outfit doesn't seem to have included either of these things. So. Is this precaution really necessary? Is it necessary to use a Hot Shoe Cover made specifically for this camera, or will any Hot Shoe Cover (or reasonable facsimile thereof) suffice? Is it necessary to use a PC Sync Socket Cover made specifically for this camera, or will any PC Sync Socket Cover (or reasonable facsimile thereof) suffice? I could easily fashion home-made ones out of styrene sheet and tubing. |
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Mamiya M645J: Hot Shoe Cover & PC Sync Socket Cover
"scenic_man" wrote in message news:2qkhi.1508$Nw5.1253@trndny04... The M645 manual recommends (in several places) that in order to avoid electrical shock: if one is using a flash connected via the hot shoe on top of the finder, then one should put a PC Sync Socket Cover on the PC sync socket; if one is using a flash connected via the PC sync socket, then one should put a Hot Shoe Cover on the hot shoe on top of the finder. IIRC, the manual does not address the case of not using the flash at all. I presume that using both at once would be absurd, not to mention harmful to (at least) the equipment. My outfit doesn't seem to have included either of these things. So. Is this precaution really necessary? Is it necessary to use a Hot Shoe Cover made specifically for this camera, or will any Hot Shoe Cover (or reasonable facsimile thereof) suffice? Is it necessary to use a PC Sync Socket Cover made specifically for this camera, or will any PC Sync Socket Cover (or reasonable facsimile thereof) suffice? I could easily fashion home-made ones out of styrene sheet and tubing. The electrical shock hazard at issue is from the sync voltage of the flash unit, not the camera. If a flash is connected to the PC socket, the voltage that appears across the PC contacts will also appear at the hot shoe, and vice versa. Some older flashs used a fair unit of voltage to sync, most modern flashes are fairly low voltage, in the 5volt area. Personnally, I think that it would be difficult to get your finger on the PC socket in such a way as to get a good electrical contact. The hotshoe might be easier to get a shock from. When not using a flash, there will no voltage present at either connection. Actually, using both the PC socket and the hot shoe is not absurd-- a fill flash in the hot shoe, and a key flash off to one side connected to the PC socket-- but depending on the flash units, it could easily be harmful and is ill-advised without elctronic testing for compatibility between the two flash units. I wouldn't worry about the covers, but then I've been nailed by some fairly high voltages with no ill effects (Except for the voices in my head!). If you are sensitive to shocks, or it makes you feel safer, cover them with any sort of insulating cover that fits. |
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