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If you're observing from heavily light-polluted sites or need maximum contrast
installed above the support rings to increase the mechanical rigidity of the entire telescope (and allow you to attach other accessories such as guide rings to precisely adjust the position of the guide telescope)
you can achieve impressive solar granulation and capture detailed sunspot features
The back-focus is standard 55mm(starting from the base of the mounting thread on the adapter ring’s housing)
The SII filter completes the set
Retekess T131S Receiver Optical Tube Mounting If you're observing from heavilyThe Retekess T131S Receiver with Headset is a lightweight, compact device designed for tours and translation, weighing just 30 grams and capable of operating continuously for up to 20 hours. Compatible with the T130S transmitter, it ensures effective communication over distances up to 100 meters (328 feet), making it ideal for group settings. This receiver includes D shaped headphones that comfortably fit both left and right ears and features a volume
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