For the May indoor meeting, RAC member Chris Cole had a very interesting presentation on the different planetary filters and their uses. The presentation used images (from both Chris’ personal collection and NASA) to compare the effects of various filters including colored wratten, UV, and IR filters. He also discussed what types of objects and conditions benefited from using these filters. Chris Cole had many of the filters he talked about and he demonstrated them to the audience. There were a lot of questions and comments from the audience.
This meeting was streamed online to members who could not attend. Although there were a few technical glitches (which we are working to address), members who were not able to attend got a chance to see the program.
