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Old May 21, 2003, 4:21 PM   #1
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Default Difference between zoom digital camera and 35mm camera

Hi

How diferent is the zoom of digital camera vs 35mm camera
A friend of mine show me the zoom (70-210 Zoom) of yours 35mm camera and i see this difference.
I focus a close object (6 feet) with full zoom and the object is no so close like focus in the camera of my friend with zoom, but when i focus in my c-700 (38-380 Zoom) a far object the zoom work good.
Anybody tell me the difference ??
The zoom works different or what?

Thanks
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Old May 21, 2003, 4:41 PM   #2
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Are you refering to Depht Of Field (DOF), ie when you zoom-in on a subject in the near field, the far away detail in a film camera will be out of focus? Whereas on a digital camera pretty much everything stay in focus... :?

The zooms work the same, it's the tiny digital camera sensor that made the difference, someone post this link here before:
http://wrotniak.net/photo/dof/#ANDRE
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Old May 21, 2003, 5:03 PM   #3
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I mean when using a 35mm camera zoom and focus a very close object with minimun zoom (70mm) the object is very close and likely out of focus, But when usign my Olympus c-700 with full zoom (380mm) the object still in focus (forget autofocus, i mean the object keep in the evf) and not so close like using a 35mm zoom.

Thanks for reply NHL
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Old May 21, 2003, 6:41 PM   #4
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Do you mean the minimum focusing distance?
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Old May 21, 2003, 7:26 PM   #5
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Yes
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Old May 21, 2003, 7:39 PM   #6
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The size of the sensor in a digital camera vs the size of the film in a 35mm camera is the key to your question. In cameras, lenses focus light on the film or sensor to produce a picture. Since most digital cameras have smaller sensors than the 35 X 26 mm exposure area on chemical cameras, digital cameras have an effecive "zoom effect" compared to traditional ones. In most cases, the result is a multiplyer effect of 1.5:1 or 1.6 :1. The problem is, of course, wide angle shooting. Canon makes a digital SLR with a 35 X 26 mm sensor with a 1:1 ratio. Downside... VERY expensive and huge files.
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Old May 22, 2003, 12:16 AM   #7
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Im very confused

My test is if i focus a close object (2 Mts) with the digital camera and full zoom i can keep focusing all object but if i focusing the same object with 35mm camera and minimal zoom is possible i can't get all object in focus because the object is too enlarge to fit in focus.
Is possible to say 35mm zoom has better performance when focusing close object because i get more enlarge object with minimal - medium zoom ?

Thanks for your patience
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