cybersoya
27th of February 2004 (Fri), 04:37
Hello
I own Canon PowerShot S50 still image camera and I would like to ask for help with technical properties of the camera.
I would like to use my camera for trigonometric spatial calculations, and for this I need to know some "intristic propertyes" of camera.
1-First I would like to ask what are the dimensions of CCD? Camera manual sais it is 1/1.8''.
Does this mean that on X axis it is 1 inch wide and on Y axis 1.8 inch high or is vice versa?
If X=1 inch and y=1.8 inch, than this mean that x is smaller than y, but photograps produced have all biger x than y.
Manual also sais ratio between x/y is 4/3, so does this mean that physical pixels on CCD are not actually squre where both sides are equally big, but they are rectangular with two unequal sides?
2-Manual sais focus range is 7.1-21.3 mm. If I understand correctly, when camera is focused "in infinity", than the final rear lense is 7.1mm away form CCD -focal point of the final rear lense is actually IN the CCD.
This means that focus as PROPERTY of the last final lense is at 7.1mm, the focus point as POINT where all lines intersect.
This means that when camera is FOCUSED on near objects, distance between final rear lense and CCD can be up to 21.3mm, but FOCAL POINT is allways at 7.1mm, while picture projected on CCD is FOCUSED at 7.1mm+14.2mm(=21.3), that is 14.2mm form lenses FOCAL POINT.
thank you
I own Canon PowerShot S50 still image camera and I would like to ask for help with technical properties of the camera.
I would like to use my camera for trigonometric spatial calculations, and for this I need to know some "intristic propertyes" of camera.
1-First I would like to ask what are the dimensions of CCD? Camera manual sais it is 1/1.8''.
Does this mean that on X axis it is 1 inch wide and on Y axis 1.8 inch high or is vice versa?
If X=1 inch and y=1.8 inch, than this mean that x is smaller than y, but photograps produced have all biger x than y.
Manual also sais ratio between x/y is 4/3, so does this mean that physical pixels on CCD are not actually squre where both sides are equally big, but they are rectangular with two unequal sides?
2-Manual sais focus range is 7.1-21.3 mm. If I understand correctly, when camera is focused "in infinity", than the final rear lense is 7.1mm away form CCD -focal point of the final rear lense is actually IN the CCD.
This means that focus as PROPERTY of the last final lense is at 7.1mm, the focus point as POINT where all lines intersect.
This means that when camera is FOCUSED on near objects, distance between final rear lense and CCD can be up to 21.3mm, but FOCAL POINT is allways at 7.1mm, while picture projected on CCD is FOCUSED at 7.1mm+14.2mm(=21.3), that is 14.2mm form lenses FOCAL POINT.
thank you