William Optics Flattener 6AIII (P-FLAT6AIII)

The William Optics Flat 6A III Flattener is a versatile accessory designed to ensure consistent image quality across the entire frame, eliminating distortions caused by the refractor's optical system. This flattener maintains sharpness from the center to the edges of the frame, preserving the "flatness" of captured objects.

Additionally, this product acts as a focal length reducer, shortening it by 0.8x. It provides an illumination circle with a diameter of approximately 44 mm, making it compatible with various cameras, including full-frame DSLRs and mirrorless cameras.

The flattener can be easily paired with different camera systems using the corresponding M48x0.75 ring adapters, including M4/3, Sony α, Nikon, Pentax, Canon, and Fuji systems.

This accessory is compatible with several William Optics telescopes, such as the GT 71, GT 81, ZenithStar 81, and ZenithStar 103. The correction distances for SLR and mirrorless cameras are specified as follows:

• GT 71: 9.1 mm
• GT 81: 7.1 mm
• ZenithStar 81: 5.2 mm
• ZenithStar 103: 2.5 mm

The back focus distances for the telescopes are as follows:

• GT 71: 64.1 mm
• GT 81: 62.1 mm
• ZenithStar 81: 60.2 mm
• ZenithStar 103: 57.5 mm

The diameter of the full illumination circle for each telescope is detailed below:

• GT 71: 44.4 mm
• GT 81: 44.4 mm
• ZenithStar 81: 44.3 mm
• ZenithStar 103: 43.1 mm

Key technical specifications of the William Optics Flat 6A III Flattener include a 0.8x focal length reduction, M63 telescope mount thread, M48 camera mount thread, and the option to mount filters using the M48 thread.

The kit includes:

• William Optics Flat 6A III Flattener

Additionally, this product comes with a 24-month warranty for your peace of mind.