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04-12-2010, 08:19 PM   #1
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Location: Montreal, Qc
Posts: 153
Need help : k-x + tamron 90mm 2.8 di macro + image 2x TC = F-- flashing

Im kind of new to dslr so maybe im forgetting a dumb thing but here it goes:

just bought a Tele converter to use with my k-x and tamron 90mm 2.8 di macro. Paid 10$ for it and its a Image MC auto tele converter 2x for PK

the problem is that it worked the first time i tried it... at first it was very dark but then i turned the aperture ring on the 90mm lens and it was ok... took a couple photos and removed it. Now i put it back to try some more testing and it seems that every mode i use i see a F-- flashing and cant seem to be able to change any settings. when i try to shoot the screen goes black and no photo is taken

when it worked i was in M or AV

there doesnt seem to have any electrical contact but has pin hanging out

anyone can help... i know its probably dumb cause it worked for 3-4 pics


Last edited by suzuki-j; 04-12-2010 at 08:45 PM.
04-12-2010, 09:28 PM   #2

Join Date: Oct 2006
Location: Chicago suburb, IL, USA
Posts: 1,535
Hi suzuki-j,

The most common reason for the F-- is that the aperture ring on the lens is not set to the "A" position. There should be a button on the aperture ring that needs to be pressed to rotate the ring to the "A" position, and it should then lock there. Other than that, dirty contacts is the second most common problem. Usually a wipe with a clean lintless cloth is enough to clean the pins on the lens and the mount on the body. With the TC, you have two sets of pins, so it's a good idea to clean them all.

04-12-2010, 10:25 PM   #3
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Join Date: Mar 2010
Location: Montreal, Qc
Posts: 153
Original Poster
thanks but after playing with settings #22 allow aperture ring settings or something like that ... its working

for 10$ its nice to play with

thanks again your comment pointed me to the right track

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