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Digital Zoom question
Hello all.
I bought a Casio Exilim 8 meg camera with a 3x optical and a 4x digital zoom. Focus is perfect in the optical area, but when I go into the digital zoom area, the focus starts to slip at the lower end and is completely blurry at fully extended. Is that the norm for digital zooms in these tiny cameras? TIA, Ron |
#2
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Digital Zoom question
wrote in message ... Hello all. I bought a Casio Exilim 8 meg camera with a 3x optical and a 4x digital zoom. Focus is perfect in the optical area, but when I go into the digital zoom area, the focus starts to slip at the lower end and is completely blurry at fully extended. Is that the norm for digital zooms in these tiny cameras? TIA, Ron Are you sure the focus is going or could you be seeing a drop in quality simply due to the use of digital zoom? My advice would be to switch off digi-zoom if you can possibly do without it. You can get essentially the same result by cropping an image from your maximum optical zoom. |
#3
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Digital Zoom question
On Wed, 12 Sep 2007 12:15:54 +0100, "John Ortt"
wrote: wrote in message t... Hello all. I bought a Casio Exilim 8 meg camera with a 3x optical and a 4x digital zoom. Focus is perfect in the optical area, but when I go into the digital zoom area, the focus starts to slip at the lower end and is completely blurry at fully extended. Is that the norm for digital zooms in these tiny cameras? TIA, Ron Are you sure the focus is going or could you be seeing a drop in quality simply due to the use of digital zoom? My advice would be to switch off digi-zoom if you can possibly do without it. You can get essentially the same result by cropping an image from your maximum optical zoom. There is not a lot of grain in the photo, so I'm sure it is a focus issue. I agree with simply not using the digital zoom, but since the camera is under warranty I was wondering if the poor focus was inherent of any small digital camera. |
#4
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Digital Zoom question
wrote in message ... On Wed, 12 Sep 2007 12:15:54 +0100, "John Ortt" wrote: wrote in message et... Hello all. I bought a Casio Exilim 8 meg camera with a 3x optical and a 4x digital zoom. Focus is perfect in the optical area, but when I go into the digital zoom area, the focus starts to slip at the lower end and is completely blurry at fully extended. Is that the norm for digital zooms in these tiny cameras? TIA, Ron Are you sure the focus is going or could you be seeing a drop in quality simply due to the use of digital zoom? My advice would be to switch off digi-zoom if you can possibly do without it. You can get essentially the same result by cropping an image from your maximum optical zoom. There is not a lot of grain in the photo, so I'm sure it is a focus issue. I agree with simply not using the digital zoom, but since the camera is under warranty I was wondering if the poor focus was inherent of any small digital camera. Could you put an example on the web and give us a url to the image? |
#5
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Digital Zoom question
On Wed, 12 Sep 2007 12:15:54 +0100, "John Ortt"
wrote: wrote in message t... Hello all. I bought a Casio Exilim 8 meg camera with a 3x optical and a 4x digital zoom. Focus is perfect in the optical area, but when I go into the digital zoom area, the focus starts to slip at the lower end and is completely blurry at fully extended. Is that the norm for digital zooms in these tiny cameras? TIA, Ron Are you sure the focus is going or could you be seeing a drop in quality simply due to the use of digital zoom? My advice would be to switch off digi-zoom if you can possibly do without it. You can get essentially the same result by cropping an image from your maximum optical zoom. Is this right? Many people opine that 'smart' digital zoom is better than cropping. |
#6
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Digital Zoom question
On Wed, 12 Sep 2007 10:48:43 +0000, ronnienospamholland wrote:
Hello all. I bought a Casio Exilim 8 meg camera with a 3x optical and a 4x digital zoom. Focus is perfect in the optical area, but when I go into the digital zoom area, the focus starts to slip at the lower end and is completely blurry at fully extended. Is that the norm for digital zooms in these tiny cameras? TIA, Ron I don't know for certain: but I would expect the actual focus should not change for digital zoom. Basically, digital zoom == crop. The digital zoom throws away pixels, so picture quality will decrease. IMHO you're better off not using digital zoom. If you want the effect of more zoom, crop in you farourite photo editing software - same difference. |
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Digital Zoom question
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#8
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Digital Zoom question
On Wed, 12 Sep 2007 08:35:40 -0700, irwell wrote:
You can get essentially the same result by cropping an image from your maximum optical zoom. Is this right? Many people opine that 'smart' digital zoom is better than cropping. Then opinions are not always right. -- Neil |
#9
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Digital Zoom question
On Wed, 12 Sep 2007 14:38:07 -0500, Carl Neil Ellwood
wrote: On Wed, 12 Sep 2007 08:35:40 -0700, irwell wrote: You can get essentially the same result by cropping an image from your maximum optical zoom. Is this right? Many people opine that 'smart' digital zoom is better than cropping. Then opinions are not always right. Until you know exactly how a camera is implementing any form of digital zoom, and it is very different from maker to maker and even model to model, you cannot, with any certainty, ever claim that digital-zoom is either useless or beneficial. It all depends on how it is implemented. In some cameras you actually can get more resolution from its digital zoom. In many others you won't loose detail but you wont' get anything better than what you can do in post processing. If your camera has RAW file capability then you won't be able to get any more detail out of any of the cameras' digital zoom modes than what you can do on your own by using the RAW data. IF, however, your camera only saves in JPG then there's a very good possibility that the digital zoom is being applied to the RAW data before JPG conversion. In that case you MIGHT be able to get more detail out of the camera's various digital zoom methods. It varies, as I said, from model to model. You will have to test this to see if your camera is one of them where digital zoom is beneficial. One of my cameras (jpg files only) shows a marked increase in detail by using the digital zoom compared to any method I have found to upsample the non-digital-zoom data to the same resolution. Another camera I have does not show any detail increase with digital zoom in its jpg files. But it does have RAW capability so I am able to accomplish the same detail recovery and upsampling in post processing to get the same benefit. If you think you can make a blanket claim about all digital zoom being useless it only shows everyone that you are a blind following idiot that only knows how to parrot the urban legends started long ago by that huge squad we affectionately call the Self-Appointed Professional Idiots. SAPI for short. |
#10
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Digital Zoom question
irwell wrote:
On Wed, 12 Sep 2007 12:15:54 +0100, "John Ortt" wrote: wrote in message ... Hello all. I bought a Casio Exilim 8 meg camera with a 3x optical and a 4x digital zoom. Focus is perfect in the optical area, but when I go into the digital zoom area, the focus starts to slip at the lower end and is completely blurry at fully extended. Is that the norm for digital zooms in these tiny cameras? TIA, Ron Are you sure the focus is going or could you be seeing a drop in quality simply due to the use of digital zoom? My advice would be to switch off digi-zoom if you can possibly do without it. You can get essentially the same result by cropping an image from your maximum optical zoom. Is this right? Many people opine that 'smart' digital zoom is better than cropping. Smart digital zoom is better than digital zoom without the 'enhancement', usually. However, you can achieve better effects, with more control with a good image editor, and some patience. |
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