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Astrozap dew shield caps are made to fit our line of aluminum dew shields.

The Astrozap FlexiHeat Dew Shield uniquely combines both active and passive methods of dew fighting with the added feature of shielding the telescope from undesirable stray light.

Astrozap Dew Heater Straps are the finest selection for the active dew fighting system. Made in the USA with advanced materials, Astrozap Dew Heater Straps apply heat evenly across the length of the strap. Astrozap stocks Dew Heater Straps for all popular sizes to fit eyepieces, finderscopes and telescope objectives. Astrozap also offers specialty heaters for binoculars, Telrad and Rigel finders.

The dew shield is the basic component of the passive dew fighting system. Astrozap Aluminum and FlexiShields are proudly made in the USA of the highest quality materials and workmanship.

The dew shield is the basic component of the passive dew fighting system. Astrozap Aluminum and FlexiShields are proudly made in the USA of the highest quality materials and workmanship.

Astrozap's Light Shrouds are a necessary accessory for all owners of Meade Light Bridge and Sky Watcher open tube (truss) Dobsonian telescopes. Truss telescopes leave a large amount of space open to the air between the primary and secondary.

Astrozap's Light Shrouds are a necessary accessory for all owners of Meade Light Bridge and Sky Watcher open tube (truss) Dobsonian telescopes. Truss telescopes leave a large amount of space open to the air between the primary and secondary.

One of the characteristics of the Newtonian telescope design is the location of the eyepiece near the open end of the optical tube. Frequently, stray light travels over the opposite side of the optical tube and prevents optimal viewing. Astrozap's Light Shields block stray light from interfering with dark adaption and concentration, thereby enabling a more enjoyable observing experience. Astrozap Light Shields are proudly made in the USA of ABS plastic for maximum durability, ease of care and appearance.
 

The Astrozap dual channel controller uses pulse width modulation technology. Each channel controls two outputs for a total of four outputs. Each channel is capable of a duty cycle from 5% on time at the low setting to 95% on time at the high setting.

Recently, the Bahtinov-style mask has overtaken the Hartmann mask in popularity for the reason that the Bahtinov diffraction pattern's unique display provides a more accurate guide to determining the optimum focus point.