DIY Rechip of the Sigma 400mm f/5.6: Sony SLR Talk Forum: Digital Photography Review

DIY Rechip of the Sigma 400mm f/5.6

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Forum	Sony SLR Talk
Subject	DIY Rechip of the Sigma 400mm f/5.6 [SIMILAR]
Posted by	wombat37 [PROFILE] [GALLERY]
Date/Time	05:41:04, 30 September 2008 (GMT)


Some of you will have found that these old Sigma 400mm f/5.6 (non-APO)telephoto lenses with A-mounts are not recognized by the Sony cameras. Sigma once offered a re-chip service but ran out of the chips a few years ago. As a result, the unrechipped ones seem to be going cheap on EBay etc. I got caught with one of these and but have managed to re-chip it myself and now it fully functions with my Sony a700. If you want to re-chip your own lens yourself, I've posted instructions at: http://webpages.charter.net/andysprojects/ I think any prime lens could be re-chipped in the same way. Andy T.

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