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  #1  
Old 21-09-11, 09:52 PM
onlooker onlooker is offline
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Focussing problems with Sigma 10-20mm f3.5
Hello all
My first thread!

I have been using my Sigma 10-20mm f3.5 for about a month now (mounted on a Canon 60D) and it was all working fine. But I recently encountered a strange problem when using the AF. The lens wont focus to infinity when I use the LCD display resulting in a blurred image. However, there doesnt seem to be a problem with the AF when the viewfinder is used. This seems to be case for all three focussing modes (live mode, 'L' live mode and Quick mode).

So could any advise me on what to do.

Thank you
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Old 22-09-11, 06:19 AM
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MattUK MattUK is offline
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Is it just that lens? Do other lenses work in exactly the same situation?

Is the lighting sufficient?
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Old 22-09-11, 06:36 AM
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silversnapper1 silversnapper1 is offline
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This lens does not autofocus when you are using live view. It's as easy as that. Sorry.
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Old 22-09-11, 06:56 AM
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thefonz78 thefonz78 is offline
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i don't get why it wouldn't ? is that the same when its on a nikon too?
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Old 22-09-11, 10:51 AM
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Works fine on my D7000

Edit - just done some research on this, and it appears that later batches of the sigmas have firmware updates that allow it to work.
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Last edited by MattUK; 22-09-11 at 10:54 AM.
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Old 01-10-11, 03:40 PM
polarmagnus polarmagnus is offline
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Quote:
Originally Posted by onlooker View Post
Hello all
My first thread!

I have been using my Sigma 10-20mm f3.5 for about a month now (mounted on a Canon 60D) and it was all working fine. But I recently encountered a strange problem when using the AF. The lens wont focus to infinity when I use the LCD display resulting in a blurred image. However, there doesnt seem to be a problem with the AF when the viewfinder is used. This seems to be case for all three focussing modes (live mode, 'L' live mode and Quick mode).

So could any advise me on what to do.

Thank you
I would be very grateful if you could post a photo on here to show me (and others) what the unprocessed photo looks like with no sharpening. I'm having problems with my f4-5.6 lens.
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Last edited by polarmagnus; 01-10-11 at 06:11 PM.
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Old 01-10-11, 04:07 PM
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thefonz78 thefonz78 is offline
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Yeah i got my d5100 now and it works fine on here too thank god.
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Old 02-10-11, 09:20 AM
Ashleyj Ashleyj is offline
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Originally Posted by MattUK View Post
Works fine on my D7000

Edit - just done some research on this, and it appears that later batches of the sigmas have firmware updates that allow it to work.
Works fine on my D90 and I bought my Sigma lens back in 2008.
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