https://negocioseinversionecuador.com/tienda/ The Cooling Fans system significantly reduces the amount of time spent waiting for reach the thermal equilibrium of the optics in the telescope. Observations can be started after 15-30 minutes (depending on the size of the mirror and temperature difference). Recommended especially for medium and large telescopes. The system additionally prevents the accumulation of a layer of warm air above the mirror, which has a positive effect on the contrast of the images.

https://www.leadingvirtually.com/todd-colbeck/

https://dradrianomastologia.com/icon-boxes/ Features:

• supply voltage: 12V - 8 AA batteries (to acquire separately) or DC12V  (included)
• quiet fans (max 28dBA) operate without vibrations
• 4x faster cooling of the mirror.
• simple assembly without the use of tools
• 3 large fans with a total efficiency of over 200m³ /h
• the system fits all telescopes equipped with the central hole M8
• smooth, lossless fan speed regulation
• in the set there is a case for storing the system.
• durable construction with a comfortable grip

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* In the T500 and T600 telescope the fans are mounted directly to the mirror frame due to the lack of a central hole. On request it is possible to order adapters for any telescope.