Re: Nikon AS-15 Hot shoe adapter
- From: dnichols@xxxxxxxxxxx (DoN. Nichols)
- Date: 5 Apr 2007 23:08:26 GMT
According to Don JM <minnie4@xxxxxxxxx>:
Hi everyone,
I just bought an AS-15 hot shoe/pc cord adapter for my Nikon D70s.
The dealer said that it will protect the sync circuitry when using
my older Vivitar 285 flash. It does trigger the vivitar. However
the instructions that came with it say to use only Nikon flash
equipment. So now I'm not 100% sure that this particular adapter
adequately protects the camera's electronics. Any thoughts? I
apologize if this has been asked previously.
The AS-15 offers *no* protection. It is just a simple adaptor.
It connects the center contact in the shoe to the center contact of the
PC connector, and the side rails of the shoe to the outer contact of the
PC connector. (From back in the days when "PC" meant "Prontor-Compur"
instead of later "Printed Circuit", and later "Personal Computer", and
currently short for "PCMCIA Card". :-)
If you want to verify this, and have a small (jeweler's size)
Phillips screwdriver, remove the two black-headed screws in the corners
beside the "foot", and examine what is in there -- just the connectors
and wire -- nothing protective at all.
Now -- if you have electronic test equipment (in particular, a
voltmeter or a multimeter), fire up your flash and measure the voltage
between the shell and the center pin of the PC connector from the flash.
The negative probe should go to the shell, and the positive probe to the
center pin. If the meter needle tries to go downscale (below zero) than
the polarity of the connector is wrong for the D70. If it goes up,
check the voltage, and compare it to the listed maximum voltage in the
camera's manual. I forget whether it is 100 V or 150 V.
Of course, you know that the iTTL metering of the camera won't
work with this flash, so you'll have to use auto mode, or purely manual.
(And in either case, be sure to turn off AUTO-ISO (if you have it
enabled) because the flash's auto mode, or your calculations, will
expect a constant ISO.
Sorry for the bad news,
DoN.
--
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