Restrictions for K mount, (not KA mount, no electronic contacts) are as follows.
Must shoot in either manual, and use the green buitton to set shutter, or stop the lens down with depth of field to meter, and adjust both shutter (on the camera) and apature (on the lens)
or shoot in apature priority with lens wide open.
Also note flash metering does not work unless wide open.
For flash, if you have the AF540 FGZ you can set it to "auto" and then it is just a matter of setting the ISO and Fstop oof the lens on the flash and the sensor in the flash does the job. (just like 1980)
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