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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 04 Nov 2010 (Thursday) 08:48
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LCD Screen

 
boog69
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Nov 04, 2010 08:48 |  #1

This is probably a stupid question but is the picture on the LCD screen come from the memory card or does it store in internal memory and remove itself after display goes off. Again, I know this is a stupid question and I should know the answer but having some issures with my Canon 20D and would like to know the answer to this before I elaborate. Thanks for your time.


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seaside
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Nov 04, 2010 08:55 |  #2

The screen image is basically a jpeg generated by the camera and located internally in the camera. That image is created using the Picture Style you have selected. Even shooting RAW the image is a rendered jpeg w/Picture Style settings applied.


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Gregg.Siam
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Nov 04, 2010 08:57 |  #3

There is an internal buffer that writes to the card. When you are looking at the pic, it is being read from the card.


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seaside
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Nov 04, 2010 09:05 |  #4

lostpacket wrote in post #11223165 (external link)
There is an internal buffer that writes to the card. When you are looking at the pic, it is being read from the card.

On the card? Not internal? That buffer can be used to take pictures without a card even being loaded in the camera. So the internal buffer is being used to generate the LCD image. No?


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SkipD
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Nov 04, 2010 09:09 |  #5

boog69 wrote in post #11223133 (external link)
....but having some issures with my Canon 20D and would like to know the answer to this before I elaborate. Thanks for your time.

What's your problem? I use a 20D and could try to duplicate a problem for you.


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artyman
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Nov 04, 2010 10:22 |  #6

The initial display immediately after taking the shot comes from the internal buffer, after the display turns off it is read from the card.


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boog69
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Nov 04, 2010 16:19 as a reply to  @ artyman's post |  #7

Skip or anyone else for that matter. I take pictures in RAW and import to Lightroom 2.7(I haven't went to ver.3 until I get problem resolved). It doesn't happen initially but after pics are there for a while, they start getting corrupted(all the bright colors) and some of them even disappear(turn black). I've tried new cards and a new card reader and it still happens. I tried shooting jpeg and import to Lightroom and it still happens. Idid have a friend put on his computer and it didn't happen but don't know how long it he left on computer. It may happen right off the bat on import or a couple of days later. I have a Panasonic FZ30 and took some pics with it and put in Lightroom and they are fine as of last night. So I don't know if it's computer or camera. Very frustrating!! Thanks for any help.


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SkipD
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Nov 04, 2010 16:39 |  #8

boog69 wrote in post #11225596 (external link)
Skip or anyone else for that matter. I take pictures in RAW and import to Lightroom 2.7(I haven't went to ver.3 until I get problem resolved). It doesn't happen initially but after pics are there for a while, they start getting corrupted(all the bright colors) and some of them even disappear(turn black). I've tried new cards and a new card reader and it still happens. I tried shooting jpeg and import to Lightroom and it still happens. Idid have a friend put on his computer and it didn't happen but don't know how long it he left on computer. It may happen right off the bat on import or a couple of days later. I have a Panasonic FZ30 and took some pics with it and put in Lightroom and they are fine as of last night. So I don't know if it's computer or camera. Very frustrating!! Thanks for any help.

I think we need a LOT more information.

When you say that "after pics are there for a while", do you mean that you've left one image displayed by Lightroom for a period of time (minutes, hours, days, ??) the image starts getting corrupted? Or do you mean that you can view the image for a few minutes today, shut it off, then view it for a few minutes tomorrow and see differences?

What I'm trying to figure out is whether your software is corrupting files or just what. Please try to explain in more detail what your problem is all about.

Try something. Make an image with the computer. Copy the RAW file to the computer TWICE, in different locations. Open one RAW file with whatever software you wish and do whatever you do to see the problem. After you see the problem, close that file and the software. Then open the other copy of the RAW file and see what condition it is in.


Skip Douglas
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LCD Screen
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