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William Optics Flattener 68III

Price:

199.000 KD


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William Optics Flattener 68III

SKU WIL-P-FLAT68III

Achieve perfect edge-to-edge sharpness and round stars with this premium 1.0x adjustable field flattener, specifically engineered for f/6 to f/7.5 refractors.

  • Full-Frame Ready: Features a 45mm illuminated image circle, perfect for Full-Frame DSLR and CMOS cameras.
  • Precision Optics: Doublet air-spaced design using high-quality Ohara optical glass with STM coatings.
  • Flexible Adjustment: Built-in adjustable distance scale for easy fine-tuning (e.g., 13.6mm for 102GTS / 7.7mm for FLT132).
  • Premium Build: CNC-machined with a blackened interior to eliminate internal reflections and glare.
199.000 KD 199.000 KD
199.000 KD

  • Brand - William Optics
Flattener Power1.0x
Lens Type2 Groups / 2 Elements
Optical Length64.5 mm
Telescope ThreadM92 x 1 x 6.5 mm
Camera ThreadM48 x 0.75 x 4 mm
T-Mount SupportCanon EF/RF, Nikon F/Z, Sony E, Pentax K, MFT, FUJI X
Camera FormatAPS-C & Full Frame
Weight718.2 g
Back Focus Diagram
Adjustment Settings for Compatible Telescopes:
Telescope Model Back Focus Adjust Distance Image Circle
Gran Turismo 81 + Back Adapter57.0mm2.0mm∅44.4mm
Gran Turismo 10268.6mm13.6mm∅44.4mm
Gran Turismo 15357.8mm2.8mm∅44.4mm
Zenithstar 12658.0mm3.0mm∅43.4mm
Fluorostar 91 + Back Adapter60.0mm5.0mm∅43.4mm
Fluorostar 12065.7mm10.7mm∅44.4mm
Fluorostar 13262.7mm7.7mm∅44.4mm
Fluorostar 15657.6mm2.6mm∅44.4mm

Connection diagrams for Flat 68III with various models:

Flattener Compatibility Table

Telescope / Flattener FLAT 61A (1.0x) FLAT 73A (1.0x) FLAT GT (1.0x) FLAT 6AIII (0.8x) FLAT 68III (1.0x) FLAT 7A (0.8x) RC Series
GS-61 / Z-61------
Z-73------
Z-81------
Z-126-----
GT-71 / GT-81-----
GT-81 WIFD--AdapterAdapter--
GT-102 / GT-153-----
FLT-91---AdapterAdapter--
FLT-120 / 132 / 156-----
RC Series------★ (Dr. Flat)
Note: Pleiades Series and Cat Series do not require a flattener.
Brand William Optics
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William Optics Flattener 68III
William Optics Flattener 68III
199.000 KD