 Eric |
Bow in the frame When taking photos with the Fuji S602 I get a bow in the frame of the painting I am photographing. Fuji aust dont seem to be able to help. any suggestions on settings or any settings for photographing paintings with a digital camera in general would help.
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Wayne Attridge |
This sounds like spherical aberration, a problem common to wide angle photography. Try moving away from the subject and using a longer lense.
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Jon Close |
"Spherical aberrations" is the term commonly used to describe a soft flare or halo effect occurring from center to edge because spherical lens elements do not focus all rays entering the element to a single point. The phenomenon described in the question is called barrel (straight lines bow in) or pincushion (straight lines bow out) distortion. Many zoom lenses will exhibit barrel distortion at the wide end and pincushion at the tele end. You may find a zoom setting where this distortion is minimized. Prime (single focal length) lenses generally have less barrel/pincushion distortion than zooms.
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Jon Close |
D'oh, I got the barrel and pincushion descriptions reversed. With barrel distortion the lines bow out, and pincushion distortion describes bending the lined inward.
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Eric |
I Just wanted to say thanks to Jon and Wayne for their responses as I really had not put a lot of detail in the question. The camera I m using is a Fuji Fine Pix S602 zoom on a tripod with halogen lighting. I am also trying to specialise in photographing fine & detailed oil paintings hence the bit on any settings which really should be any advice from anyone doing the same would be greatly appreciated. Thanks again and I will try the above.
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doug Nelson |
Looks to me as if you're expecting an amateur camera to do more than it is designed to do. The average user could care less about barrel and pincushion distortion present with MOST zooms, but you have a very specialized application that demands a distortion-free lens. You might use a digital SLR with a Nikon or Canon lens known to have very little or no distortion, maybe a 50-mm macro. You could also shoot film and scan the negs or have them scanned. From what I have read, Minolta has fairly consistently made distortion-free 50's.
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Eric |
Doug, Your right and I am an amateur on the end of an amateur camera. Learning as I go into this specialised area. Moving the tripod and going more to the telephoto side is minimising the bow, I might even get a spot where it is gone altogether. I will also give the camera a go in its Macro mode. Eventually I feel I will have to move to film and an expensive camera/lenses and scan them in. Thanks for your help Eric.
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