markfields Posted May 15, 2006 Share Posted May 15, 2006 I have done a carefull study with the viewfinder on my rebel XT. the sensor/viewfinder alignment ia off by .5 degrees. It is not a focus or distortion (barrell/pincushion) issue as I do understand what those are about. I did a carefull tripod test with the bottom of the frame exactly lined up with a sqaure frame and the left bottom is tilted up(the entire frame is roated .5 out of "square". I do understand that the viewfinder shows about 94-95 % of what is actually captured in the file- that is not the issue. Every one of my images- particulalry those that involve angles and straight lines with horizon lines/curbs/windows etc require that I rotate my images in photoshop .5 degrees. It is easily noticeable. has anyone else had this issue and can canon fix it. Could I demand replacement body? It happens that because 5 % of what is in the files was not actually seen in the viewfinder (becuase its not a 100% accurate viewfinder) after I rotate the files .5 (to the left) I do not loose any of what i thought i was getting anyway but its still a hassle.. I just crop off that bit that i loose. Any ideas? I think I'd prefer to have it fixed or get a replacement. Your thoughts/ experience with same? Many thanks. mark Link to comment Share on other sites More sharing options...
peter_langfelder Posted May 15, 2006 Share Posted May 15, 2006 No experience with the digital Rebels, but my film Rebel 2000 also has a slightly misaligned film box. It is clearly visible on strips of film, the long edges are not aligned. I haven't tried measuring the viewfinder/film box alignment, but I wouldn't assume it's perfect either. BTW, on my EOS 3 there's also a slight bit of film box misalignment, but it's less noticable. Link to comment Share on other sites More sharing options...
mtwhite Posted May 15, 2006 Share Posted May 15, 2006 <p>I've noticed the same clockwise tilt with my XT on a few occasions. I always assumed it was because I was in a rush and rarely use a tripod. I almost never shoot straight-on horizontal or vertical architecture or landscapes anyway, so it's not a big deal for me personally. <p>It's possible that my Rebel 2000 had the same problem, but I had just never noticed it. I never shot slides, and always had to adjust a slight tilt from the negative scanner (a cheap flatbed) as a matter of course. Link to comment Share on other sites More sharing options...
fourfa Posted May 15, 2006 Share Posted May 15, 2006 My Nikon N80 and D70 had the same problem. It's a problem in the viewfinder alignment, not the sensor (or film). Part of what makes a cheaper camera cheap is loose tolerance for things like this. However if you complain and send it back, it'll likely get fixed. Link to comment Share on other sites More sharing options...
m_barbu1 Posted May 16, 2006 Share Posted May 16, 2006 I noticed this with my 20D, though I haven't measured the amount. Link to comment Share on other sites More sharing options...
david_gonzalez Posted May 16, 2006 Share Posted May 16, 2006 Perhaps a little off topic, but I thought I noticed the same thing on my 20D, then found out it's just me. I was having to tilt my pics in Photoshop about 0.5 degrees clockwise all the time, mostly people pics, candids, and such. When I noticed this I set out to deliberately make sure all the lines were straight in the viewfinder and the pics came out OK. I don't remember having this problem with 35mm slides or prints, so I guess it's the combination of the smaller viewfinder with aging eyes for me. I have to admit that sometimes I envy the switchable gridlines in my friends D100... Link to comment Share on other sites More sharing options...
fourfa Posted May 16, 2006 Share Posted May 16, 2006 ...unless the gridlines are also rotated a degree from true, as was the case with my D70 and N80. I just kept them turned off. a real bubble level works much better when it really matters. Link to comment Share on other sites More sharing options...
frank_bart Posted September 14, 2006 Share Posted September 14, 2006 I have exactly the same problem for the second time. Canon did replace the cmos sensor for me but the problem returned a short time later, I am sending it back again and asking they replace my camera body. Mine tils a entire degree! I use the same solution though photoshop. Link to comment Share on other sites More sharing options...
robert_robson Posted October 17, 2006 Share Posted October 17, 2006 i have the same problem with my canon rebel xt but mine is on the right side the camera is in jamesburg for repair i was in touch with canon for a replacement my frameline tilts up on the rightside tech support says camera is working fine and factory service says the allignment is off i get it on angle shots how can i tilt it in photoshop? Link to comment Share on other sites More sharing options...
frank_bart Posted October 17, 2006 Share Posted October 17, 2006 Photoshop has a rotate canvas option under the image menu then select arbitrary and rotate direction as well as degrees. Then use the crop tool to resqaure the image. I was refused by Canon to have my camera fixed a second time with the same problem. I think my next cameras going to be a Nikon! Link to comment Share on other sites More sharing options...
fourfa Posted October 17, 2006 Share Posted October 17, 2006 rethink that strategy - your next camera should be a more expensive model. Like I said above, I had the same problem with two different cheap Nikons. Link to comment Share on other sites More sharing options...
frank_bart Posted October 17, 2006 Share Posted October 17, 2006 Does anyone have the new Rebal XTI yet? I wonder if its going to have a simalar problem. Please post if you know anything on this camera. Thanks Link to comment Share on other sites More sharing options...
kelly_flanigan1 Posted October 17, 2006 Share Posted October 17, 2006 Sometimes optical devices with "horizontal" sensors are set up this way purposely, to reduce patterning with horizontal objects. Link to comment Share on other sites More sharing options...
kelly_flanigan1 Posted October 17, 2006 Share Posted October 17, 2006 1/2 degree is about a 0.87 foot drop in 100 feet, and would be considered real missadjusted builders level, which one can align to say 0.01 feet in 100ft with a decent model. <BR><BR>Over a say 10mm side of a sensor, a 0.5 degree error would be 87 microns, about the thickness of a piece of paper.<BR><BR>If you shot 2 folks of equal height standing 3 feet apart; your tilted camera would make on chap appear 5/16 inch taller!<BR><BR>is you tilt with respect to the tripod mounting base too, or is it a viewfinder to sensor error? In the old days one used the cameras base as the reference, the viewfinder was just an aid. Link to comment Share on other sites More sharing options...
frank_bart Posted October 17, 2006 Share Posted October 17, 2006 Kelly, That?s pretty funny thanks for the laugh, I did not do some precise measurement of the errors, all I know is the pictures take look tilted and I got the measurement from Photoshop that?s the amount of rotation that seems to straighten things back up where I would want them. I agree the viewfinder is a guide but isn't the purpose of true TTL so that what you see is what you get? FB<div></div> Link to comment Share on other sites More sharing options...
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