Starfield 140mm Focus Mask (FM-140) Power Adapter the required distance will vary

the required distance will vary depending on camera specifications

Designed to be used with any telescope with a 2” focuser

The iOptron iEQ45/CEM60/CEM70 LiteRoc tripod has a die-cast aluminum top with heavy duty stainless steel tripod legs

The exterior bag dimensions are 21" L x 9" W x 6" D

Before StarSense

Starfield 140mm Focus Mask (FM-140) Power Adapter the required distance will varyThe Bahtinov mask is used focus small telescopes accurately. Although masks have long been used as focusing aids, the distinctive pattern was invented by Russian amateur astrophotographer Pavel Bahtinov. Simply place the mask in front of the main optic of your telescope and take a picture. Look at the diffraction spike pattern and continue until the spikes are even. Using a Bahtinov mask is the easiest way to get into focus. This 140mm mask is great