Category
Filters & Solar
Narrowband filters trade light for contrast, pulling emission nebulae out of a washed-out sky. Solar equipment is different in kind: a filter is not an accessory, it is the safety system. Read the safety note on every solar page before you buy or build anything.
UHC Filter
A wide-ish narrowband passband tuned to the lines emission nebulae actually emit.
Filters & Solarobserving
OIII Filter
A tight passband on doubly-ionised oxygen — the most aggressive nebula filter.
Filters & Solarobserving
Light Pollution Filter
Blocks the specific emission lines of sodium and mercury street lighting.
Filters & Solarobserving
Solar Filter
The only piece of equipment on this site that protects your eyesight rather than your image.
Filters & Solarsetup
Herschel Wedge
A prism that dumps 95% of the light out of the back — full aperture, true colour, no film.
Filters & Solarobserving
Other categories
Telescopes & Mounts
The light-gathering end of the hobby — optical tubes, the mounts that carry them, and the support that keeps them steady.
Eyepieces & Optics
Where magnification is actually decided — eyepieces, Barlows, reducers, diagonals and finders.
Imaging & Astrophotography
Cameras, guiding, filter wheels and dew control — everything that turns photons into a processed image.
Observing Accessories
Star atlases, planispheres, red lights, chairs and cleaning kits — the kit that makes a long night work.