Post by Pembrokeshire Astronomer on Jun 21, 2018 8:11:42 GMT
What filters do you have (and use) and why, visual and or imaging
For visually observing, if the planets (Mars,Jupiter and Saturn) look a bit unfocused or "murky" I often use a Blue 80a filter to "clean" them up a bit.
Whenever a low, near the horizon planet starts "boiling" or "shimmering" the 80a filter often calms the planetary image. Saturn (near the horizon) especially benefits from the inclusion of an 80a filter.
The 80a can also by used as a very handy Moon filter. Though often near full Moon I use a pair of sunglasses as my Moon filter, they work really well!
80A is useful for Moon and Planets and Double Stars though (arguably) 96 is better for double stars.
We also have 21 which allegedly is good for planets - particularly Jupiter and the GRS. (untested by us)!!
The group does have some filters - but they would require some finding in the container!!!
I have the case with the eyepieces and four filters. Will bring along to next meeting. They are marked as follows: Moon, Moon double stars where one is brighter, Jupiter and Jupiter Saturn Double stars. Haven't used them so cannot comment on them.