We’re not too far away now from the 2020 Mars opposition which will occur on October 13th where it will be just over 22 arc seconds in apparent size and shine at magnitude ~-2.6. Unlike other recent oppositions, Mars will be higher in the sky at ~40 degrees altitude from the UK so that will…
Baader’s ND5.0 AstroSolar film can be used to safely view and image our Sun. The most popular size is their A4 variant which allows you to make a full aperture filter for small camera lenses or telescopes or a sub-aperture filter for larger instruments and in some cases still have some of the film left…
The Celestron RASA 8″ was designed with small CCD cameras, colour astronomical CMOS cameras, and mirrorless cameras in mind. Of course one can use Mono cameras too. If you have multiple filters and want to swap between them during an imaging run, to take LRGB or narrowband (e.g. with Baader’s F/2 filters) taking the camera…