Hi,
I recently bought the Sigma 24-70mm F/2.8 EX DG as a walkaround lens and I am soon going on a trip abroad where I planned to use it a lot. However it seems my K10D has problems to set the aperture, sometimes the top-display says "F--" as if it were a manual aperture lens.
I searched for similar problems on the web and found a post right here with the K10D and the same Sigma, and one of the tips were to use some tinfoil on the third pin to force the camera to believe it's an "A" lens, which works fine for me (but not for the person in the other post).
But it's a brand new lens, it should work out of the box, and I don't want to do the tinfoil thing since it will make some of my older manual lenses appear as auto-lenses and mess with the metering. And since I'm going on the trip for a month soon, I don't want to send the lens away either.
So my question to all you Pentax gurus is, is there a way to fix this more permanently by myself? Can i somehow extend one of the pins (camera or lens) and make it work with the Sigma AND older lenses still being treated as manual? Or is there another way to solve this?
I'd be grateful for any tips and if you need more details just ask! If someone can see anything in it I also attach a photo of the lens' pins.