Is there life after aperture block failure?

Oiche wrote:

peterpainter wrote:

canonaimer wrote:

I also had the aperture block failure, but found a fix. I had obtained some Lithium ion AA rechargeable batteries for a flash, so I tried them in the K50. Has worked perfectly with them. Still doesn't work with the original battery, but has not had one bobble with the lipo aa's.

Thank-you. That's interesting. Do you use the aa battery insert 'thingy' or can you put them in without that?

Peter you can get a 3rd party AA adapter off Ebay for about £3, I have one myself which I'll be selling with my K-30, it works as good as the Pentax one which is about £35. Unfortunately they removed the AA option in the K-70.

I used Lithium, Alkaline and Enelope batteries in it.

Come to think... After 4 years your Pentax battery may have started to loose current which is too low for your aperture solenoid, the AA batteries could fix it and It would try 1.5V Alkalines first rather than the 1.2V rechargeable batteries.

My own K-30 battery is poorly but the aperture still works but maybe my solenoid requires less power, a failing solenoid has been tested to need more current, somewhere on thd net a guy posted his findings lifting weights with good and bad solenoids etc.

Interesting.  I do have another battery which has never been used so have put it to charge and will see what happens.  Still thinking about what to do next!