Hi,
What can you do during a rainy and boring day?
Yes, write something about about old project ideas that newer have been realized.
For many years I have been wondering how to construct a beam splitter system to make more efficient use of exposure time when doing color or narrow band imaging.
I have today written down my ideas here:
http://astrofriend.eu/astronomy/proj...d-imaging.html
There are a lot of interesting links there too to read.
/Lars