A versatile solution for visual observers, who wish to use OIII, H-Beta, Deep Sky, etc, filters, with their favourite eyepieces. a Narrow Custom-Wheel is directly mounted on the large back of the SCT using a (A) SCT-LR, SCT lock-ring. A long barrel version of the (B) SCTM-2PFF adapter). This enable 2" eyepieces or a 2" diagonal to be inserted as shown. In this picture a low cost manual version of the Custom-Wheel is used (note the (C) Hand-knob under the 2" adapter). For 1.25" eyepeices use the M42 'drop-down' adapter) in conjunction with a Female 1.25" eyepiece adapter)
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