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Lunt Solar Systems' 12mm Blocking Eyepiece Filter, when used with a Lunt front hydrogen-alpha filter or a dedicated solar telescope, provides a 12mm aperture for observing the Sun's surface. The straight tube viewing configuration filter fits into 2" focusers, and accepts any user-supplied 1.25" eyepieces and accessories. This model is recommended for use with optical tube assemblies (OTAs) with a focal length of up to 1200mm for visual observation or 600mm for astro-imaging.
In the Box
Lunt Solar Systems 12mm Blocking Eyepiece Filter (2" Straight Tube)