The Astronomik OIII Visual Filter is mainly for observing planetary nebulae, it’s unsuitable for use with CCD cameras except in combination with an additional IR block filter.
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This product has multiple variants. The options may be chosen on the product page
Astronomik UHC-E Filter – This filter was designed for the visual observation of emission and planetary nebulae with (mainly) smaller scopes, but also works well for imaging these objects if used with an IR block. The IR block can be inbuilt, as with a DSLR, or in combination. The Astronomik L3 type luminance filter gives particularly good results and colour balance. Price includes delivery.
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This product has multiple variants. The options may be chosen on the product page
ANTLIA L-filter V-series PRO (UV/IR-cut) Astronomy Imaging Filter only – Mounted in 2″ Filter Cell (50.8mm).
This product listing is just for the L-filter (Luminosity or UV-IR-cut filter)
The QHY CFW 1.25 Inch Adapter is designed to connect QHY mono planetary cameras and the QHYCFW3-S-US and QHYCFW3-S-SR filter wheels using the native dovetail camera fitting. If you’ve removed the dovetail fitting to reveal a female T thread, you can use this adapter instead.
The Antlia 2″ 4.5nm SHO Filter Set is extremely good and represents great value at the price point. Only far more expensive filters, such as Chroma, will give better results.