Modify a Point & Shoot Digital Camera for Older MF lens
Many people use adapter ring , or even modify the lens mount, for fitting their MF lens to their DSLRs. In this project, I provides an alternative that a point and shoot digital camera was modified for mounting MF lens. The lens I use is Praktica PB mount lens
Choice of camera
1. The camera must not have optical zoom because most optical zoom assemblies have electronics inside. Unplugging the optical zoom makes the camera inoperable.
2. The camera must not have shutter blade.
3. The IR filter is of the same size as (or bigger than) the CCD sensor.
I used Centrios DSC-314 which has a fix lens resembling that of a webcam.
Procedures:
1. Open the camera and get access to the lens assembly.
2. Remove the lens assembly.
3. Salvage the IR filer from the lens assembly. It is the hardest part as the IR filter was glued inside the lens assembly. It is easier to use an IR filter from another broken camera.
4. Glue the IR filter onto the CCD sensor.
5. Cut a piece of tube from a big funnel, double-side tape a piece of black paper inside the tube.
6. Re-assemble the camera without the lens assembly.
7. Glue the tube to the camera as shown in the diagram below.
8. Make a hole on the end cap of the lens. The hole size matches the tube diameter.
9. Try out the distance between the end cap and the camera, and then glue the end cap to the tube.
10. Glue a magnifying view finder to the camera’s LCD window. It helps focusing a lot.
Some finished looks
Sample Shots
Some Improvements (Aug 7, 2009)
The above pictures are not as sharp as the lens can do. A probable cause is that the light reflected inside the tube. So the following changes were made:
1. Cut the tube and remove the portion from the CCD censor to the camera enclosure (see the drawing below).
2. Spay everything inside the camera black.
3. Add a long lens hood (see the picture below).
After the changes, improvements are obvious.
Test shots after the changes
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End of the project
