Promaster 5550 DX Flash

Started Dec 26, 2013 | Discussions thread
JNR
JNR Senior Member • Posts: 2,809
Re: Update

Russell Evans wrote:

MikeFreeze wrote:

Seems that I like it best when I dial in -1 EV, but that's just an early observation.

Use a bulb blower to blow out the sensor hole in the front to see if that helps. Might be a few years of dust built up in it since these are a decade or two old now. Clean the contacts and making sure the pins springs are in good order and all pins are at the same level. You'll want to clean the contacts on the flash as well.

Thank you
Russell

Excellent point about the sensor hole. In fact, you might want to take a bit of alcohol on a Q-tip and get the shield as clean as possible. Crud can easily reduce sensitivity by one stop.

For those curious, some auto sensors simply implement a grayscale screen to change the settings. The old Vivitars with the variable knob in the front are a continuous grayscale screen so you can actually micro-adjust between the official click stops to get the exact light/aperture setting desired. The "M" setting simply covers the sensor.

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JNR
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