IR Photography with 5D mark 2

[errol roldan]

<p>has anyone experienced this? it happens when i set the exposure for more than 60 seconds. although not all of them has this "dark spot" phenomenon. 1/3 of the frame seems to be a third stop darker. i shot this RAW. i was using a 5d mark 2 with the new firmware, canon 24-70 2.8L lens and a Hoya R72 filter.</p>

<p><img src="http://farm4.static.flickr.com/3507/3230240076_59b61d6355_o.jpg" alt="" width="400" height="600" /><br>

70 sec at 5.6, ISO 100 at RAW</p>

<p> </p>

[e_thp]

<p>I went out today after seeing your post earlier this week and took a few frames.<br>

Then I saw you said only after 60 seconds. (are you using a wired or wireless remote?<br>

Then I re-read and cannot duplicate your exact scenario.<br>

So I stuck my camera out the back door and aimed up and blew out a hundred odd seconds at f something.<br>

5dII with a 50/1.8 and a hoya r72<br>

jpg with the original firmware.<br>

<img src="http://www.photo.net/photo/8549261" alt="" /><br>

<a href="../photo/8549261">http://wwwphoto.net/photo/8549261</a><br>

I'm having a bear of a time processing these down. they just act different.<br>

prolly ask in a separate forum post.<br>

thanks</p>

 

[errol roldan]

<p>thanks for the reply. went on a photo trip with a friend that has the 5d2 this morning. we did both shots with the same lens/same filter/same settings/tripod/ but with different body. his camera had none of the effect i had. i think its getting worse and worse. did a 30 sec exposure and the dark area showed up. im going to Canon tom and ask for a replacement. </p>

[errol roldan]

<p>heres some samples again.</p>

<p><img src="http://farm4.static.flickr.com/3301/3237789313_8e3bcc68d5_o.jpg" alt="" width="400" height="600" /></p>

<p><img src="http://farm4.static.flickr.com/3108/3237789309_77784e272a_o.jpg" alt="" width="600" height="400" /></p>

[cm1]

<p>Apart from this specific problem, wold someone like to share his experience with the 5D2 and IR photography? What filter do you recommend and what exposure times did you get?</p>

[william_gruner1]

<p>This occurs on any long or high ISO exposure when there's light shining through the viewfinder. It seems odd, but I've confirmed myself several times that covering the viewfinder during the exposure fixes the problem and I now make it a habbit to do so every time I shoot IR. You can find some more details on methods and equipment at <a href="http://markdeux.blogspot.com/">http://markdeux.blogspot.com</a>. Hope this helps. Cheers.</p><div></div>