Sigma 70-300 not working

Best regards, John

I experienced a similar problem with mine. I found that cleaning the contacts every so often normally resolved the problem. A lint free cloth is the best thing to use. Also, switching the camera off, taking the lens off and refitting it had the desired effect. Not terribly convenient, though!!
If there's an aperture ring, also double check it is still set to "A".
Thanks very much Michael and John i've cleaned the contacts and everything is fine now

Kind regards Maria

https://www.facebook.com/pages/Maria-Gray-photography/589310071158079?ref=hl

Pentax K1-ii and MZ6
Pentax Lenses 28-80 F, 300 DA*, 80-200 F, 35 F2.4 AL, M50 F1.7, 28-105 DFA, 20 F4 SMC
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autumnlight
Member
Derbyshire
Kind regards Maria
https://www.facebook.com/pages/Maria-Gray-photography/589310071158079?ref=hl