Hi.
A few days ago I started having F0.0 on my Canon 7D whilst using my Sigma1.4x tc and Canon 500mm F4. Took tele-converter off, put it back on, cleaned the contacts with no joy. Removed tele-converter and tried bare lens and all worked ok.
Took it home and put it back in its bag. A few days later took it out and tried again and it worked. Next outing I was shooting Kingfishers at distances of 30m and F0.0 came up again. Removed tele-converter and shot bare 500mm for rest of morning.
Back at home I put the TC on kitchen cupboard and left it there and looked at prices of Canon 1.4x TCiii. Later I glanced at mine and noticed it was tilting. Upon closer inspection I found 3 out of 5 screws in the mount were missing.
Contacted Sigma Service who promptly replied to ask a few specific questions and then organized for screws to be sent free of charge.
Very impressed parts were still available, and that they sent them to me FOC. I was ready to spend £400 on a new Canon one.
Thanks Sigma service, nice to be able to post positive comments when a problem with your kit arises.
Ian
A few days ago I started having F0.0 on my Canon 7D whilst using my Sigma1.4x tc and Canon 500mm F4. Took tele-converter off, put it back on, cleaned the contacts with no joy. Removed tele-converter and tried bare lens and all worked ok.
Took it home and put it back in its bag. A few days later took it out and tried again and it worked. Next outing I was shooting Kingfishers at distances of 30m and F0.0 came up again. Removed tele-converter and shot bare 500mm for rest of morning.
Back at home I put the TC on kitchen cupboard and left it there and looked at prices of Canon 1.4x TCiii. Later I glanced at mine and noticed it was tilting. Upon closer inspection I found 3 out of 5 screws in the mount were missing.
Contacted Sigma Service who promptly replied to ask a few specific questions and then organized for screws to be sent free of charge.
Very impressed parts were still available, and that they sent them to me FOC. I was ready to spend £400 on a new Canon one.
Thanks Sigma service, nice to be able to post positive comments when a problem with your kit arises.
Ian
