Pat Speer Posted October 20, 2006 Share Posted October 20, 2006 A friend of mine just gave me an old Bell and Howell Zoomatic camera. It was his family's camera and hasn't worked for decades. It is non-functioning. It appears to be the same model and make as zap's. Is there anything we can learn from this camera? Link to comment Share on other sites More sharing options...
John Dolva Posted October 20, 2006 Share Posted October 20, 2006 one thing could be to set it as Zapruder had it and film a fine regular grid and use that to see the 'pin or barrel' distortions. I'd like to see something like that in order to see which area of the zap frames can be regarded as 'true'. Link to comment Share on other sites More sharing options...
Jack White Posted October 20, 2006 Share Posted October 20, 2006 (edited) one thing could be to set it as Zapruder had it and film a fine regular grid and use that to see the 'pin or barrel' distortions. I'd like to see something like that in order to see which area of the zap frames can be regarded as 'true'. These are things other highly qualified researchers have already determined, notably Dr. Costella, who is a specialist in lens effects. If you are good at interpolations from raw data, you may determine this by checking the STRAIGHTNESS of the concrete wall at the top of early frames. The amount of curvature of the top of the wall indicates the ARC of the pincushion distortion. This curvature may be interpolated over the entire frame by the proper mathematics. Do it yourself if you do not trust Costella. His newest version was fine tuned to correct minor variations of a pixel or two. He had the advantage of comparison with a panorama I shot using a tripod and fine ELeitz lens. Jack Edited October 20, 2006 by Jack White Link to comment Share on other sites More sharing options...
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