Parfocality through firmware

Started May 18, 2015 | Discussions thread
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nikanth Junior Member • Posts: 46
Parfocality through firmware
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Most zoom lenses made for DSLRs seems to be not parfocal. Can't the firmware be made to maintain the focus on the same distance, as the zoom is changed? Does any camera does this? Or is there a modified firmware like chdk or nikon firmware, that attempts to do this?

 nikanth's gear list:nikanth's gear list
Nikon D5100 Nikon AF-S DX Nikkor 55-200mm f/4-5.6G VR Nikon AF-S DX Nikkor 18-55mm f/3.5-5.6G VR Nikon AF-S DX Nikkor 35mm F1.8G
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