Founder Optics 1X Universal Field Flattener - FLAT1.0

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This 2" universal field flattener was designed for f/5 to f/7 refractors and is a field flattener of choice for the Founder Optics FOT86 when doing astrophotography. Like most fiel d flatteners, it requires 55 mm of back focus. The FLAT1.0 is compatible with both M42 and M48 threads, comes with protective caps for both ends, and has a strong, beautiful glossy anodized finish. Show more