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Old 03-20-2013, 09:11 PM
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phil pang
 
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Back focus is adjusted with a chart.
http://www.dsclabs.com/resolution.htm

You must have an 15+ year old lens. All SX cameras have 2/3" chips, the normal 2/3" ENG lens nowadays is at 7.7mm. A wide angle went from 5.2mm to now 4.5mm.

Are you talking about the rotary encoder for the iris and zoom that displays what setting you're at on the VF?
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