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Archive 2012 · Warped Sensor
  
 
Brad Williams
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p.1 #1 · Warped Sensor


Is it possible for a sensor to get warped or should I look at my lenses?

I should shoot a bunch of test shots before I ask, but I haven't...

Old School Canon 5D Mark i with a boatload of shots on it. I have used the heck out of it!

I notice it for sure on the 24-105 F4 L IS, which just came back from the shop a month or so ago... Everything on the right side of the photo is soft. Divide the photo in 4 and its the furthest left 1/4.




Aug 10, 2012 at 02:28 AM
Gochugogi
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p.1 #2 · Warped Sensor


More likely your lens mount is out of alignment or your 24-105 suffered a hard ride with UPS and elements drifted from true. My 70-200 4L became very soft on the left side after I ran a couple blocks with it around my neck. I cradled it much of the time as I ran but apparently there was enough trauma to knock the elements out of alignment. Canon fixed it but now I stow my gear in a bag before bolting.


Aug 10, 2012 at 02:57 AM
RobDickinson
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p.1 #3 · Warped Sensor


^ as said the sensor itself may not be warped but the chassis may be or more likely the mount.


Aug 10, 2012 at 03:05 AM
PhotoTeacher
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p.1 #4 · Warped Sensor


If you see the problem with other lenses, then possibly the sensor is out of alignment, but if it is only with the one lens, then that points to a lens problem, with the mount or with internal elements. I had a similar problem with my 70-200, and it took 3 trips to NJ before they got it right, but it has been fine since.


Gochugogi wrote:
More likely your lens mount is out of alignment or your 24-105 suffered a hard ride with UPS and elements drifted from true. My 70-200 4L became very soft on the left side after I ran a couple blocks with it around my neck. I cradled it much of the time as I ran but apparently there was enough trauma to knock the elements out of alignment. Canon fixed it but now I stow my gear in a bag before bolting.




Aug 10, 2012 at 03:57 AM
Monito
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p.1 #5 · Warped Sensor


Check for play in the camera mount. If there is any, tighten the screws. Check for loose screws in the camera mount. If there are any, tighten the screws.

Check for play in the lens mount. If there is any, see if you can find screws to tighten, but they are likely to be very tiny if you can find them. If it is the lens mount that is wobbly, you may have to have it repaired.

Do rigorous image tests of all your lenses. This is one occasion where brick walls can be handy. Make sure that the camera is absolutely parallel to the brick wall. Use triangles and the half-field of view (horizontal and vertical) as seen in the viewfinder to check to make sure you are parallel. "Rigorous" means careful control of variables. Apply logic and care and you can do it.



Aug 10, 2012 at 04:26 AM
 

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EB-1
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p.1 #6 · Warped Sensor


My D800 may have a warped sensor too.


EBH



Aug 10, 2012 at 04:34 AM
Monito
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p.1 #7 · Warped Sensor


Sensors do not warp. They are built on crystalline silicon substrates that are sliced extremely thin. If there was enough differential force on one corner or edge to 'warp' it, it would crack.

Camera bodies like the 5D classic and the D800 are made from alloy metal chassis and tend not to 'warp' unless subjected to sufficient trauma that all kinds of other problems show up first.

Mounts do shift or get loose, rarely.



Aug 10, 2012 at 04:39 AM
Gochugogi
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p.1 #8 · Warped Sensor


Monito wrote:
Sensors do not warp.


Nevertheless, a few photogs have been known to get a bit twisted...



Aug 10, 2012 at 06:48 AM
Ian.Dobinson
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p.1 #9 · Warped Sensor


Brad Williams wrote:
Is it possible for a sensor to get warped or should I look at my lenses?

I should shoot a bunch of test shots before I ask, but I haven't...

Old School Canon 5D Mark i with a boatload of shots on it. I have used the heck out of it!

I notice it for sure on the 24-105 F4 L IS, which just came back from the shop a month or so ago... Everything on the right side of the photo is soft. Divide the photo in 4 and its the furthest left 1/4.




Well YES you should shoot a bunch of test shots.
You should test the 24-105 and if possible a couple more lenses . Then if possible test them on a different body . (if it's you only body then do you know someone else with a canon body? )



Aug 10, 2012 at 08:00 AM





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