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January 17th, 2007, 12:33 PM
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#1 |
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Inner Circle
Join Date: Jan 2006
Posts: 2,290
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back focus
Would an improperly set up back focus affect shots where no zooming occurs?
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January 17th, 2007, 12:41 PM
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#2 |
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Wrangler
Join Date: Aug 2005
Location: Toronto, ON, Canada
Posts: 3,637
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It could on the wide end if it was really out of whack, causing a "macro" effect. Generally though, if you are focusing by eye after the frame size/zoom is set, then you should be able to compensate and find sharp focus at some point on the barrel.
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Tim Dashwood |
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January 17th, 2007, 12:47 PM
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#3 |
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Inner Circle
Join Date: Feb 2006
Location: Belfast, UK
Posts: 6,152
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Yes, especially at the wide end of the zoom, an incorrect backfocus will result in soft shots at the shorter focal lengths where this setting is most critical.
The macro setting does throw off the backfocus in order to focus closer, but you have to focus by eye using the macro ring at the focal length you're using, so you can't zoom. |
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January 17th, 2007, 10:02 PM
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#4 |
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Trustee
Join Date: Apr 2006
Location: United States
Posts: 1,158
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word to the wise, I've found that checking the back focus on the stock lens every time I shoot is a good thing.
Steve Oakley |
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