Got 2DMK2, but so many dead pixels,Return?

[Xinca]

<p>I used 40 as theadhold of hot pixel and 250 as dead pixels. Should I retuen it? I got a good deal like(at least I thought I was) 1000$ discount becuase it is a customer return one.<br>

I have turned off all the noise reduction functions and took RAW then convert to TIFF 8bit.</p>

<p>Thanks.<br>

Data:</p>

<table border="0" cellspacing="0" cellpadding="0" width="300">

<col width="75"></col> <col width="75"></col> <col span="2" width="75"></col>

<tbody>

<tr height="13">

<td width="75" height="13">

<p>ISO</p>

</td>

<td width="75">Speed</td>

<td width="75">Hot(40)</td>

<td width="75">Dead(250)</td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13" align="middle">100</td>

<td>100</td>

<td align="middle">0</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">100</td>

<td>60</td>

<td align="middle">0</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">100</td>

<td>15</td>

<td align="middle">0</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">100</td>

<td>1s</td>

<td align="middle">3</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">100</td>

<td>5s</td>

<td align="middle">25</td>

<td align="middle">2</td>

</tr>

<tr height="13">

<td height="13" align="middle">100</td>

<td>10s</td>

<td align="middle">28</td>

<td align="middle">3</td>

</tr>

<tr height="13">

<td height="13" align="middle">100</td>

<td>15s</td>

<td align="middle">39</td>

<td align="middle">6</td>

</tr>

<tr height="13">

<td height="13" align="middle">100</td>

<td>30s</td>

<td align="middle">54</td>

<td align="middle">8</td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13" align="middle">200</td>

<td>100</td>

<td align="middle">2</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">200</td>

<td>60</td>

<td align="middle">2</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">200</td>

<td>1s</td>

<td align="middle">14</td>

<td align="middle">2</td>

</tr>

<tr height="13">

<td height="13" align="middle">200</td>

<td>5s</td>

<td align="middle">28</td>

<td align="middle">5</td>

</tr>

<tr height="13">

<td height="13" align="middle">200</td>

<td>15s</td>

<td align="middle">64</td>

<td align="middle">7</td>

</tr>

<tr height="13">

<td height="13" align="middle">200</td>

<td>30s</td>

<td align="middle">74</td>

<td align="middle">11</td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13" align="middle">400</td>

<td>100</td>

<td align="middle">2</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">400</td>

<td>60</td>

<td align="middle">2</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">400</td>

<td>15</td>

<td align="middle">2</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">400</td>

<td>1s</td>

<td align="middle">20</td>

<td align="middle">2</td>

</tr>

<tr height="13">

<td height="13" align="middle">400</td>

<td>5s</td>

<td align="middle">44</td>

<td align="middle">6</td>

</tr>

<tr height="13">

<td height="13" align="middle">400</td>

<td>15s</td>

<td align="middle">88</td>

<td align="middle">9</td>

</tr>

<tr height="13">

<td height="13" align="middle">400</td>

<td>30s</td>

<td align="middle">114</td>

<td align="middle">13</td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13" align="middle">800</td>

<td>100</td>

<td align="middle">6</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">800</td>

<td>60</td>

<td align="middle">7</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">800</td>

<td>15</td>

<td align="middle">12</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">800</td>

<td>1s</td>

<td align="middle">27</td>

<td align="middle">1</td>

</tr>

<tr height="13">

<td height="13" align="middle">800</td>

<td>5s</td>

<td align="middle">85</td>

<td align="middle">7</td>

</tr>

<tr height="13">

<td height="13" align="middle">800</td>

<td>15s</td>

<td align="middle">140</td>

<td align="middle">9</td>

</tr>

<tr height="13">

<td height="13" align="middle">800</td>

<td>30s</td>

<td align="middle">186</td>

<td align="middle">14</td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13" align="middle">1600</td>

<td>100</td>

<td align="middle">2</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">1600</td>

<td>60</td>

<td align="middle">0</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">1600</td>

<td>15</td>

<td align="middle">3</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">1600</td>

<td>1s</td>

<td align="middle">18</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">1600</td>

<td>5s</td>

<td align="middle">42</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">1600</td>

<td>15s</td>

<td align="middle">88</td>

<td align="middle">2</td>

</tr>

<tr height="13">

<td height="13" align="middle">1600</td>

<td>30s</td>

<td align="middle">117</td>

<td align="middle">3</td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13" align="middle">3200</td>

<td>100</td>

<td align="middle">63</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">3200</td>

<td>60</td>

<td align="middle">78</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">3200</td>

<td>15</td>

<td align="middle">79</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">3200</td>

<td>1s</td>

<td align="middle">89</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">3200</td>

<td>5s</td>

<td align="middle">114</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">3200</td>

<td>15s</td>

<td align="middle">199</td>

<td align="middle">2</td>

</tr>

<tr height="13">

<td height="13" align="middle">3200</td>

<td>30s</td>

<td align="middle">422</td>

<td align="middle">5</td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13" align="middle">6400</td>

<td>100</td>

<td align="middle">1111</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">6400</td>

<td>60</td>

<td align="middle">1134</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">6400</td>

<td>15</td>

<td align="middle">1122</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">6400</td>

<td>1s</td>

<td align="middle">1149</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">6400</td>

<td>5s</td>

<td align="middle">1257</td>

<td align="middle">2</td>

</tr>

<tr height="13">

<td height="13" align="middle">6400</td>

<td>15s</td>

<td align="middle">2203</td>

<td align="middle">2</td>

</tr>

<tr height="13">

<td height="13" align="middle">6400</td>

<td>30s</td>

<td align="middle">15001</td>

<td align="middle">4</td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13" align="middle">12800</td>

<td>100</td>

<td align="middle">8909</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">12800</td>

<td>60</td>

<td align="middle">8584</td>

<td align="middle">1</td>

</tr>

<tr height="13">

<td height="13" align="middle">12800</td>

<td>15</td>

<td align="middle">9041</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">12800</td>

<td>1s</td>

<td align="middle">9773</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13"></td>

<td></td>

<td></td>

<td></td>

</tr>

<tr height="13">

<td height="13" align="middle">25600</td>

<td>100</td>

<td align="middle">92828</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">25600</td>

<td>60</td>

<td align="middle">91474</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">25600</td>

<td>15</td>

<td align="middle">87161</td>

<td align="middle">0</td>

</tr>

<tr height="13">

<td height="13" align="middle">25600</td>

<td>1s</td>

<td align="middle">112268</td>

<td align="middle">0</td>

</tr>

</tbody>

</table>

[ben_goren]

<p>Alex,</p>

 

<p>First, run a manual cleaning cycle. That should re-map anything visible.</p>

 

<p>Next, take a picture of a dark scene, as long an exposure at as high as an ISO as you ever

anticipate using. Be sure to have long exposure noise reduction turned on. Then, re-frame the scene

and take another picture. Examine the first for any hot / dead pixels you can find that you think are

objectionable. Check the exact same X / Y coordinates of the second picture to see if the same

problems exists there.</p>

 

<p>If and only if both pictures have the exact same problem at the exact same location and you find

the problem objectionable and you aren’t willing to take the 2-3 seconds per picture in post-processing to correct it…well, if all that’s the case, then should you consider returning the

camera. If not, stop measurebating and have some fun with the camera!</p>

 

<p>Oh — if it’s not obvious, the test is more of an excuse to get out with the camera and

be amazed at what it can do. Find some colorful lights reflecting off a lake or something like that, and

enjoy!</p>

 

<p>Cheers,</p>

 

<p>b&</p><div></div>

[Xinca]

<p>No. I will get 5D. I mean I will return this "good deal" and get full price brand new one.<br>

I like this camera.Even my GF can see the difference compare this one to my old old 350D.<br>

Maybe I should change my title to "Should I go cheap or".<br>

Thanks and I will do the sensor cleaning then test again.</p>

[g dan mitchell]

<p>If you shoot very long exposures - as in some of your tests - without using the long exposure noise reduction setting you will get very bad noise and solid red, green, and blue pixels. This is normal on the 5D.</p>

<p>Try your tests again with the long exposure noise reduction feature turned on... and take a look at your images to test the output since that is what matters.</p>

<p>Dan</p>

[phule]

<p>Just for clarification, if a pixel is dead, it is always dead. Just like the parrot. Dead pixels don't come back to life, so your last column needs to be re-thought.</p>

<p>Long exposure noise reduction is included with the camera for a reason. G Dan Mitchell offers good advice. </p>

 

[nathangardner]

<p>I was thinking the same thing as Dan. If there are 0 dead and 0 hot at low ISO and fast shutter, could it be that its just High ISO or long exposure noise?</p>

[g dan mitchell]

<p>Yup, that is almost certainly the issue.</p>

[images_in_light_north_west]

<p>Iso 100 for 5s and 25 hot pixels to me is unacceptable if they cant be permanently mapped out, but if you bought it used ($1000 discount) thats probably why it was returned to begin with. The most i have ever seen on mine was 3 hot pixels at 30s, iso 100.<br>

Ross</p>

[model mayhem gallery]

<p>Is it still under manufactures warranty? Have you thought about sending it to Canon for maintenance. Maybe if it is that far out of tolerance they can replace the sensor? By the way do you "see" an image quality problem when using the camera?</p>

[Xinca]

<p>Thanks for all response. It really helps.<br /> I decide the return this one and get a brand new one instead.<br /> Even my old 350d does not give me any hot/dead pixels at iso 200/1s. I think this body is defect one.<br /> Maybe I can keep it and send it back to Canon right away but I really want to happy shooting from tomorrow instead spend a lot of time one camera itself.<br /> Thanks again.</p>