astroimages
Darin E. Fields' Astrophotography Pages
 

MAC Quickcam CCD: Generation II--circa 1999

Quickcam II is assembled and ready for testing in daylight.  I decided to make the entire housing from pvc fittings.

Here is the housing parts list:

    1 2" Cleanout adapter
    1 2" Cleanout plug
    1 2" Cap (not threaded)
    1 camera mounting ring salvaged from the camera I had so much fun disassembling
Total cost (not counting the old camera I destroyed) $3.73

I also used:

    1 small 1/8th  ring of 1.5" pvc which I cut from a piece of tubing


    1 small 1.5" x 1" piece of flat plastic.
    These were used to mount the CCD PCB
     

Step one involved mounting the CCD inside the "cleanout plug" which screws into the cleanout adapter.  In order to accomplish this and have room for the cord to exit the back of the cap, it was necessary to build a small mount for the board.  I sliced a 1/8th inch ring of 1.5" pvc tube and glued a small piece of flat plastic to it.  I drilled two holes in this ring to attach it to the cleanout plug.  I drilled two holes in the flat plastic to mount the CCD.  I used the holes previously used for the lens assembly to attach the CCD to this ring mount.  See figures 1 & 2.


 
 

qc1:
Figure 1. plastic base for ccd (back side)
qc2:
Figure 2: side view

This ring base and the attached CCD board were then mounted inside the cleanout plug. (Figures 4 &5)


 
 

qc3:
Figure 4: CCD board mounted in cleanout plug
qc4:
 Figure 5: Front view
 

Now the CCD can be easily screwed into the cleanout adapter. Figures 6 & 7.


 
 

qc7:
Figure 6: Cleanout adapter and plug.
qc8:
Figure 7: Front view
 

The camera lens mounting ring is now mounted directly to the front of the cleanout adapter. Add some handy tape to secure the wiring and we're done.
Figures 8,9,10.
 


 
qc9:
Figure 8: lens mount attached to cleanout.
qc10:
Figure 9. All done and ready to test!
 

OH, wait. What about the cap?  A very handy cover for storage!
 
 
qc13:

Actually the plan was to cut a 1.25" hole in the end and use it to mount the trusty film canister for use on the telescope.  But I have changed my mind. Instead my plan is to purchase a second cleanout adapter and some additional fittings and build a second housing for telescopic mounting. Then I can simply unscrew the cleanout plug with the CCD in it and screw it into whichever mount I wish to use. Pretty Cool, eh?

P.S. It just happens to turn out that the distance from the back of the cleanout (i.e. from the start of the plug) to the front is almost exactly 4.5 mm.

I just hope it still takes pictures. But heck, if it doesn't I'll just get another.
 
 

Telescopic CCD Mount Completed:

A second trip to Home Depot and another 2 bucks and the new telescope mount for the CCD is finished.

Significant modification was made to two PVC fittings: a 2" female coupler and a 1.75" to 1.25" trap adapter.

Sorry, I forgot to take pictures of these prior to modification  and assembly.

The 2" female coupler was cut in half, leaving only the threaded end (into which the 2" cleanout plug with CCD board will screw).  Then the back end of the trap adapter was sawed off, leaving only the threaded end plus a flat plate which fits inside the threaded piece of female coupler. Since the "trap adapter" was inteded to accept a slightly flanged piece of 1.25" drain pipe, I simply used that.  I had an old piece of chrome drain pipe laying around.  One could use platic or metal. I will have to blacken the inside.  The images below are of the assembly without the CCD board/plug, the assembly with the CCD board/plug, and a front view down the tube.


 
 

tele1: tele2:
tele3:


 
 

Testing Phase:

I took some photos through the camera mount with different lenses. Here they are. For each I indicate the lens size.  All of the pictures are looking out my office window at the end of my street, about 175-200 yards away.
 
 

test-c: test-d: test-b:
This photo was taken using a 28 mm (f3.5) wide angle lens.  The telephone pole is almost exactly 175 yards from the lens. The darker tree in the center (across the road) is about 250 yards and appears in the next photo. This photo was taken using a 85-210 mm telephot/zoom lens. I didn't have a lot of luck imaging at 210 mm.  This shot was taken at about 135 mm. The darker trees on the right are the pine trees across the road in the last picture.This is a photo of the telephone pole on the left in the first picture. This was taken using the 400 mm (f6.3) telephot lens.  This is the same pole I taped the newspaper headline to and imaged with the 4.5" telescope. 

While the focus and exposure here are not what I'd hoped, I'm astounded at the magnification.  Its easily double what you'd get looking through the lens on a camera.  I guess what's actually happening is I'm imaging a small area of the larger frame coming out of the lens. 

 
 
 

Telescope testing (7/5)

I snapped a couple of quick daylight photos with the telescope just to insure that I could still focus the CCD with the telescopic mount.  It worked quite well.  These images are of the top of the telephone pole in all the previous photos.  I've been trying to figure out why the exposures seem less than satisfactory and all I can figure is that it is so darned HOT that the chip is picking tons of heat/IR.
 
 

pole1: pole2:

But all I wanted to verify is that the new CCD mount would focus.  Happy happy happy.

Now, I need a cool night with stars.  It was supposedly "clear" last night.  But it was 85 with 75% humidity and you could barely see any stars, so I bailed on the idea of going out.