SVBONY SV209 Focal Reducer/Field Flattener 0.8x for SV550 122F7 (W9161B)

SVBONY SV209 Focal Reducer/Field Flattener 0.8x for SV550 122F7

This 0.8X focal reducer/field flattener is designed specifically for prime focus astrophotography with the SVBONY SV550 122mm f/7 apo refractor. The fully-multicoated reducer/flattener converts the 854mm focal length f/7 refractor into a 683.2mm f/5.6 system for faster and wider field astronomical and terrestrial photography. In addition to reducing the focal length of the telescope and thereby increasing the photographic speed, the flattens the normal field curvature inherent in refractors.

This provides images that are sharply focused out to the corners of DSLR and CCD imaging chips. The reducer/flattener threads into the focuser for a secure connection. The threading is metric 63x1. Back focus is 55mm from the shoulder of the reducer to the image plane, the standard spacing for DSLR camera bodies.

How To Use

1. SV550 122mm APO Telescope

2. Remove the adapter

3. Connect SV209

Correction of Field Curvature Defects

-- Improving Image Quality At The Edge Of The Field Of View

In addition to reducing the focal length of the telescope and thereby increasing the photographic speed, the flattens the normal field curvature inherent in refractors. This provides images that are sharply focused out to the corners of DSLR and CCD imaging chips.

Fully-Multi-Coated Lens Structure

The fully-multicoated reducer/flattener converts the 854mm focal length f/7 refractor into a 683.2mm f/5.6 system for faster and wider field astronomical and terrestrial photography.

• This 0.8X focal reducer/field flattener is designed specifically for prime focus astrophotography with the SVBONY SV550 122mm f/7 apo refractor. 
• The fully-multicoated reducer/flattener converts the 854mm focal length f/7 refractor into a 683.2mm f/5.6 system for faster and wider field astronomical and terrestrial photography
• In addition to reducing the focal length of the telescope and thereby increasing the photographic speed, the flattens the normal field curvature inherent in refractors. This provides images that are sharply focused out to the corners of DSLR and CCD imaging chips
• The reducer/flattener threads into the focuser for a secure connection. The threading is metric 63x1
• Back focus is 55mm from the shoulder of the reducer to the image plane, the standard spacing for DSLR camera bodies

Technical Specifications

Name SV209 0.8x SKU W9161B Reducer 0.8x Thread (mm) 63x1 BackFocus 55mm Fully Multi-Coated Yes In the Box

• SV209 0.8x Reducer/Field Flattener
• 2PCS Dust Cover

Manuals & Warranty

Svbony 1-Year Warranty