Archive for September 18th, 2013
I carry the Canon SX230HS in my pocket, so as to have a decent camera ready when it’s needed; yes, it’s in a cloth case. Unfortunately, in recent weeks a tiny hair made its way into the lens stack, where it shows up as a slight blurring just left of center in high f/stop images:
With the camera attached to the stereo zoom microscope, the hair becomes painfully obvious:
Of course it’s in the middle of the image. [sigh]
A bit of searching turns up a bootleg technique to remove the front lens from the turret (basically, just twist and pull), but neither of the internal lens surfaces thus revealed lie near a focal plane and, in any event, were surprisingly clean. The hair is probably lodged just in front of the image sensor, most likely stuck to the back of the final lens where it casts a shadow on the sensor. If it wandered around you’d call it a floater.
Dismantling the entire camera and opening the lens stack seems fraught with peril, particularly as the camera pretty much still works fine for normal picture-taking. More pondering is in order…