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06-12-2012, 06:02 PM   #1
ron paterson

Lens AF330FTZ on K -x Camera

Can anybody give me a tip to get best use of AF330ftz flash on K x Camera body.

06-12-2012, 06:19 PM   #2
twitch's Avatar

Join Date: Nov 2009
Posts: 4,571
It's use is very restricted on the K-x, seems like it's manual only (as the K-x does not support TTL only p-TTL) and even then you only have a choice in power between 1/16 and 1/1.
06-12-2012, 08:18 PM - 1 Like   #3
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Join Date: Jun 2011
Location: Atlanta
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You will have to use it in manual mode, either MH (full output) or ML (1/4 output). An interesting twist is that you can control the output also by using its zoom settings. If your lens is 55mm or longer, any zoom setting (28, 35, 50, 70, 85) can be used and it will cover the field of view of the lens. With shorter lenses you will see vignetting at longer zooms.

In full mode (MH) you get for ISO 100 these guide numbers in meters: 20 (@28mm), 24 (@35mm), 28 (@ 50mm), 31 (@70mm) and 33 (@85mm)
In low mode (ML) you get: 5, 6, 7, 7.8 and 8.3 respectively.

You can calculate the correct Guide number (subject distance / F-stop) and then from that the proper zoom setting.

Another way to use the flash in "Auto" mode, it to leave it in TTL mode. It will always fire at full output. If you use an F, FA or DA lens, in Av mode, it will communicate with the flash and set the proper zoom setting. It will also display the effective distance of the flash for the selected f-stop in the camera and the ISO value. You can keep changing the f-stop until the maximum distance is approximately the same as the subject-to-flash distance and the exposure will be correct.

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