Make: Volume 77

TABLE 1. Commonly available lenses tested with

the RMS running at 720p

1. FOV refers to the field-of-view

2. The pixel scale is calculated at 720p resolution

3. m @100km refers to the spatial resolution at a

distance of 100km

4. M*

limit

is the limiting stellar magnitude

The Raspberry Pi 4B with a good SD card is a

must. For our installations we typically use plastic

or aluminum enclosures with a fan to keep the

CPU cool. You can also 3D print your own RMS

enclosure (Figure

C

), but don’t forget the fan! Or,

you can use an aluminum case which acts like

a passive heatsink and has no fan. Apart from

that, the rest of the design is flexible with the ...