PentaxForums.com - View Single Post - Just received my Vivitar MC TC 2x PK-A. Need help.

Lowell Goudge · 05-26-2008, 09:54 AM

Originally Posted by raider

Thanks for the help, clm and JMS.

JMS - Okay. I now tried to set the lens to "A" and the SR previously also set to 100mm. I am on latest k100D firmware as well.

On Av mode, it still give an AV - - reading. Ditto for M mode. So I guess the "A" data is not being transmitted properly? How would I fix it.

Thanks!

Check for dirty contacts on the teleconverter and lens. clean them with a gum eraser (not an abrasive one)

ALso the A mode pin is resessed on the camera this pin gets shorted to ground (mount) to turn A mode on.

check on the TC with the lens attached AND the A mode set on the lens, that this pin does stick out, and with an ohm meter, that with A mode set there is a very low resistance between this pin and mount.

Note, this pin is the third one from, the lens locking pin

If not it is time to troubleshoot/

05-26-2008, 09:54 AM	#5
Lowell Goudge Pentaxian Location: Toronto Gallery Photos: 2 Posts: 5,349	Originally Posted by raider Thanks for the help, clm and JMS. JMS - Okay. I now tried to set the lens to "A" and the SR previously also set to 100mm. I am on latest k100D firmware as well. On Av mode, it still give an AV - - reading. Ditto for M mode. So I guess the "A" data is not being transmitted properly? How would I fix it. Thanks! Check for dirty contacts on the teleconverter and lens. clean them with a gum eraser (not an abrasive one) ALso the A mode pin is resessed on the camera this pin gets shorted to ground (mount) to turn A mode on. check on the TC with the lens attached AND the A mode set on the lens, that this pin does stick out, and with an ohm meter, that with A mode set there is a very low resistance between this pin and mount. Note, this pin is the third one from, the lens locking pin If not it is time to troubleshoot/ Last edited by Lowell Goudge; 05-26-2008 at 10:13 AM.