Has anyone fitted secondary mirror heating to an ASA 10N?
I've suddenly become interested following the partial ruin of an otherwise excellent photography session by uncontrollable dew formation on the secondary mirror.
Are there any reasons why fitting a heater should NOT be attempted?
If there aren't, what suitable units are there on the market?
As one of my prime dark sky sites is particularly susceptible to dew formation around this time of year, I eagerly await help on this issue!