At 02:56 PM 4/14/2006, you wrote: >On 4/14/06, Huber, Rick <[EMAIL PROTECTED]> wrote: > >> Truthfully >> this doesn't look like the typical dust issues I have seen on a digital >> sensor. They are too defined and almost in focus. Dust on your sensor >> would block several pixels and would look more like a giant blob of >> fuzzyness rather than a defined spot on the photo. > >They do look rather distinct. I wonder if it could possibly be >something on the sensor itself, rather than just on the filter. That >would explain both the better focus and the ineffectiveness of >cleaning procedures. If that is the case, it's definitely in need of >a return to Canon.
This is definitely dust or oil on the sensor filter, not the sensor as I can move it around and clean it via the solvent/PecPad wiping, just not with CO2 duster. You really have to correlate dust appearance with aperture. My shots were at F32, slightly sharpened to accentuate them. Any lower F stop will make them appear more blurry. After several cleanings with PecPad wrapped on credit card cut to size, there were a few spots that refuse to change. Here are some 100% crops around those spots at different F stops: http://www.airsprite.net/5D_dust/dust_32.jpg F32 http://www.airsprite.net/5D_dust/dust_22.jpg F22 http://www.airsprite.net/5D_dust/dust_16.jpg F16 http://www.airsprite.net/5D_dust/dust_11.jpg F11 http://www.airsprite.net/5D_dust/dust_8.jpg F8 http://www.airsprite.net/5D_dust/dust_5_6.jpg F5.6 You can see that the spot is evident at F16, starts to disappear at F11 and nearly invisible at F8. I did not enhance the contrast. WayneS * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
