William Optics Field Flattener 68III

This field flattener is designed for FLT132/GT102/GT153. This revolutionary new WO FF68III Adjustable Flattener was made for 6 -7.5 F ratio refractors. This high-quality flattener has been engineered and CNC machined for usage with our FLT 132, 102GTS and other APO refractors. This accessory is a must-have for refractor astrophotography. Lens• Designed to cover full-size DSLR cameras with a clear lens aperture of 50 mm• STM coated with an excellent doublet air-spaced design.• Produced entirely with the best Ohara optical glasses.• Flattener Power: 1x (no reduction).• 45mm for full illuminated imaging circle. Amazing• It will flatten the field amazingly well and finally make you see those round stars!• This unique flattener works with WO or other 6-7.5 F ratio refractors. Superb Finish• Superb William Optics anodized finish.• All internal surfaces threaded and blackened for no reflections.• Protecting covers are included on both sides. Easy to Use • Will accept any standard T-ring for y