William Optics GT153 Triplet APO Refractor

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About this product

The all new William Optics GT153 is a triplet APO refractor telescope.

The high quality FPL53 triplet air-spaced objective lens and premium anti-reflection coatings provides superb resolution and contrast. 

The FPL53 ED glass together with long focal length (f7.8 focal-ratio) also ensure very high colour correction so negligible chromatic aberration. .

When used the optional Flattener-8 (0.72x Reducer/Flattener) the GT153 becomes a fast F5.6 astrograph suitable for use with full-frame cameras. 

When used for visual astronomy the views are astounding! 

Simply Beautiful Finish

• CNC machined out of solid high-grade aluminium. No plastic parts. 
• Powder-painted white CNC-machined aluminum tube with retractable dewshield.
• Anodized 360 degree rotatable FT focuser.
• Bahtinov cap (patented).
• Precise and robust CNC machined lens cell.
• CNC-machined mounting rings with carry handle & guiding rings.
• Triple testing each lens by Zygo test ensures highest optical quality

Includes mounting rings, guiding rings, large Losmandy type dovetail, CNC handle, Bahtinov cap & 3” Rotolock adapter. 

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