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Anonymous Posted on Sep 14, 2005

Dead Pixels??? I am an amateur photographer and I do not know too much yet so bare with me. I have been taking pictures of the moon lately to get the feel for my new camera (Canon EOS 20D) and I have noticed something kinda strange. When I?m looking at the pictures on my computer, and I zoom in past 100% on the right hand side there is this tiny white spec and blue dot. When I zoom in more the white spec is shaped like a star of five squares. It seems to be on all of my photographs (it?s in the same spot every time), or at least the ones I shot in low light conditions. I have heard of some people talking about, ?dead pixels? and was thinking maybe that?s what it is (I was not shooting in RAW.) Or maybe there is some dust or something on my sensor. Anyone else seen this?

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  • Posted on Sep 14, 2005
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Joined: Aug 25, 2005
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It's a hot/stuck pixel. It's not dust. If it's always the same shade of white and on every shot it's stuck. If it's some shade from grey to white and only shows up on longer exposures, it's hot. Can't be fixed. Canon should be able to map it out, but I'm not sure of their warranty policy. Sometimes warranties on sensors specify a maximum number of defects. Very few, if any, warranty a sensor to be perfect, with zero dead, stuck or hot pixels. If you don't specifically look for it in a print, it's unlikely that you (or anyone else) will notice it.

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1helpful
2answers

I would like to be able to take a good picture of a full moon on a clear night.

You're going to face two separate problems here.

One, the moon occupies a rather small portion of the night sky. Even fully zoomed in, the moon is going to be not much more than a bright spot in the sky.

Two, the camera is designed to assume that almost every scene is an average brightness. Given how much of the scene is a black sky, the camera will attempt to render the sky as average (what photographers call a "medium gray"). This will result in a picture with a gray sky and a featureless white blob for the moon.

If you think about it, the full moon is nothing more than a really big rock under a midday sun. Thus what you want is the same exposure as when taking a picture on a clear sunny day. Unfortunately the camera is going to be fooled by all that dark sky and try to compensate for it. What you really need is to be able to bypass the camera's light meter and set the proper exposure yourself. The C195, unlike more sophisticated cameras, doesn't allow you to do so. Sorry, but that's just the way it is.
tip

How to take best pictures.

1. The best pictures can be taken with a tripod and using self timer or the remote control of the camera.

2. Some people think that the best picture can be taken with suddenly pressing the shutter. In reality it is not true. So the best pictures can only be taken with two steps. First, pressing half way and without not shaking the camera continuing on pressing the shutter. At last the camera takes picture. But a good photographer does not know the moment of taking the picture. He/She only knows and concentrates on not shaking the camera.

3. Best pictures can only be taken with an artistic point of view. Best photographers place the subjects to the most estetic point and the best estetic position.

4. Best pictures can only be taken without using the flash.

5. Best pictures can only be taken at the Golden Hour time. Golden Hour is the time period, starting with the Sun rise and ends after an hour. Second Golden Hour starts before an hour of Sun Set and ends with the Sun Set.

6. Best pictures can only be taken by a best photographer so you can never see a best photographer's portrait as a best picture.

7. Best pictures can not be taken with a most expensive camera but can be taken by a best working amateur photographer.

8. Best pictures can not be taken by professionals but can be taken by the professional amateurs.

9. Best pictures can only be taken with the camera which has a greater sensor size.

10. Best pictures can only be taken with a natural view of the objects.
on Apr 21, 2010 • Cameras
1helpful
1answer

Can I take clear good pictures of a full moon on a clear night?

You're going to face two separate problems here.

One, the moon occupies a rather small portion of the night sky. Even fully zoomed in, the moon is going to be not much more than a bright spot in the sky.

Two, the camera is designed to assume that almost every scene is an average brightness. Given how much of the scene is a black sky, the camera will attempt to render the sky as average (what photographers call a "medium gray"). This will result in a picture with a gray sky and a featureless white blob for the moon.

If you think about it, the full moon is nothing more than a really big rock under a midday sun. Thus what you want is the same exposure as when taking a picture on a clear sunny day. Unfortunately the camera is going to be fooled by all that dark sky and try to compensate for it. What you really need is to be able to bypass the camera's light meter and set the proper exposure yourself. The C195, unlike more sophisticated cameras, doesn't allow you to do so. Sorry, but that's just the way it is.
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Picture download isn't same size as camera says

First, don't confuse pixels with bytes. Though you didn't specify the model of your Sony camera, I assume you're taking 10 megapixel photos. This simply means that the photograph is comprised of about ten million points of color. When those points of color are processed and compressed (JPEG files are always compressed) they will usually take up much less than ten million bytes on the memory card or your computer's hard disk. As an extreme example, consider a photograph taken with the lens cap on. All ten million points will be pure black, and it certainly doesn't take 10MB to say that.

Second, without knowing anything about the product you're trying to create or the site where you're trying to do it, no one can help you.
Aug 31, 2012 • Cameras
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1answer
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Red line on the display and shows up on photos

if this red line is still on the picture when you open in the computer, I`m a fried you will need a new CCD. If the pictures are ok in the computer is probable some wire that connect the LCD are interrupted , or the LCD have some dead pixels.
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My Pictures come out way too light or way too dark, HELP!

Check your ISO, your white balance, and whether you have set exposure compensation by mistake.
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Dead Pixels

You cannot fix the bad pixels, it simply means your screen has been damaged OR there was a manufacturing problem (faulty hardware).

The phone should still be under warranty, you need to send it in to be repaired.

Post back for further help (Additional info). Thank you for choosing Fixya!
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Optoma EP716 Projector

Hi,

Make sure that the resolution shown by the projector matches with that of the computer resolution. Many projectors does it automatically.
But if there exists a problem in resolution matching, there is a chance of getting partial picture. So better check that the resolution shown by the projector matches with that of the computer.

Also, the pixel may be degraded due to,
  • Their susceptibility to heat; the organic compounds used in LCD filters - in particular the blue - can be broken down by excess heat, resulting in a degradation of image quality.

  • "Dead Pixels"; pixels can become permanently on or permanently off, and while this is barely noticeable with one dead pixel, the presence of multiple dead pixels can be a irritation.
The only way to fix the problem is to replace the 3 LCD panels which, if you could get the part would cost you more than a new one.
LCDs are really difficult to make so lots of them do actually get passed with dead pixels on them.

But i suggest you to get some advice from the service center too.....
Hope my info solves your problem.
Thanx for using fixya.
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The spot meter area is small because I have photographed 2 people side by side many times, focused on ones chest then found that the "spot" had slipped into the little space between them, the bad focus not really showing up when I checked the LCD. (My eyes are old and so are my glasses.) Got home and found useless pictures. Sometimes I was outdoors in the sun and couldnt check the LCD. Some of the threads say the focus spot is "off center" with no acccurate way of finding it when using the viewfinder. I take some beautiful, wonderful pictures but these errors really tear me up. I've got to get the LCD box viewer with the 2x lens viewer I guess. All those years as a 35mm Canon F1 user I would long for a spot meter almost daily. Now I see that a matrix meter AND a spot is the real choice. I hope eventually to learn to outwit my 3000Z because it does give me such excellent pictures. Sometimes there is noise on a face, sometimes it is the focus and at functions it is so embarassing to ask a principal subject to wait because the *** or ***H procedures take so long. A wedding, other than the reception, would be near impossible in *** or higher. Good Luck, Dav.
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