Although it is not a specific high speed filter, through our real test, the Super D Duo-narrowband filter behaves well when using together with a fast telescope even at f/1.9.
How to replace the location of the finder base and its screw?(PHQ series&FRA series)
You can gently clean it using anhydrous alcohol and cotton balls. However, we kindly advise against disassembling it for cleaning on your own, as this may lead to optical issues. In most cases, cleaning isn’t necessary unless it affects the imaging quality. If you feel it requires cleaning, we recommend sending it back to us for professional servicing to ensure it’s handled with care. We’re here to help! 😊 Here’s a friendly suggestion for cleaning: Start by using an air blower to gently remove dust from the surface, and then carefully wipe it down with anhydrous alcohol and lint-free cotton balls. This method helps protect your equipment better!
We all refer them as ED glasses. ED glass is currently used in the market, and you can rest assured of its quality.
Our telescopes can all be connected to eyepieces, but the SQA series cannot be connected to a diagonal telescope.
If you want to alleviate this situation, it is recommended to use M54 and larger adapters as much as possible.
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