Electrical modifications and construction of electrical accessories can
be dangerous. Do not attempt such activities unless you are qualified
to do them
safely, without injury to yourself or your property. Anyone
not qualified for these activities should secure the help of a
licensed electrician. It is always recommended to consult with the
appropriate manufacturer prior to modification of any equipment, as
this may void warranties and/or alter the
Removing the QuickCam Lens and IR Filter
purchased an old logitech Quickcam VC ($5.00
For astrophotography, this camera requires removal of the lens; the
lens isn't needed because the telescope functions in place of the lens.
There is also an IR filter that should be removed. Following are
instructions for removing the lens and IR filter:
assembled QuickCam is shown below (left photo). Remove the
mounting bracket screw and top cover (right photo)
Unscrew the lens and remove the camera from the black plastic housing
(below left photo). Remove the two screws holding the threaded plastic
lens mounting cover over the ccd chip (below right photo). Be careful
not to damage or smudge the ccd
chip or loose the small screws.
The IR filter is the blue-green circle inside the plastic
lens mounting cover.
IR filter from the plastic lens mounting cover (below left photo).
Optionally, the plastic lens mounting
cover can be reinstalled to protect the
ccd chip (below right photo).
into the black plastic housing (below photo); note
this photo, the camera is installed without the plastic
lens mounting cover over the ccd chip.
QuickCam Webcam Adapter
Low cost astrophotography with a web cam requires some sort
to attach the web cam to the telescope. Typical methods are to tape a
35 mm film can or eyepiece barrel to the webcam or purchasing a
commercial adapter (typically $20-$50). I just taped an unused
0.965 inch. eyepiece barrel to the QuickCam with electrical tape.
Provided you use enough tape to get a strong connection, this works
just fine. The same procedure
could easily be applied to constructing a 1.25 inch. adapter.
I constructed a webcam cooling fan from a small DC computer fan
(purchased for $5.00). The cooling fan is
mounted to polycarbonate hobby plate that is cut to fit the contours of
the round QuickCam (below photos).
I cut a hole
into the QuickCam
housing (below left photo) and the fan attaches with
electrical tape (below right photo). I used a low voltage DC power
convertor (from an old mobile telephone) to power the fan.