Taking Pictures with Microscope Filmholders Several microscopes in the lab are equipped with Poloroid filmholders, which allow users to take pictures of their samples. These instructions apply to all of the filmholders.

Instructions

1. Make sure the knob at the base of the cone shaped fixture that supports the filmholder is in the center position .
2. Make sure that the exposure control unit is turned on (the switch is on the right side).
3. Unless you know what you are doing, set all of the knobs on the exposure control unit to the numbers with boxes around them. Set the ASA knob to the ASA setting that is printed on the film envelope. Set the exposure time knob to your desired exposure time. Try starting with a 20 second exposure time. You may want to try adjusing the exposure time or the light intensity.
4. Turn the lever on the top of the film holder to "L."
5. Hold the film by the side at about the middle of the film and insert it into the film holder. The side with the word "Poloroid" should be up and the side labeled "This side towards lens" should be down. Insert the end of the film envelope with the metal strip first.
6. Once you have the film about half way into the film holder, insert it the rest of the way by pushing on the back end of the film envelope. Push it in firmly, but try not to bend the film.
7. Pull the envelope back out until it stops.
8. Expose the film by pressing the expose button on the exposure control unit.
9. Push the envelope back into the film holder.
10. Turn the lever on the film holder to "P" and pull the film all the way out of the holder at a medium speed. This will spread the developer over the film.
11. After 15 - 20 seconds, open the film envelope and remove the film. Be careful. The developer paste inside the envelope is caustic.