- SV209 0.8X focal reducer/field flattener is designed specifically for prime focus astrophotography with the SVBONY SV550 122mm f/7 apo refractor;
- It can correct the defect of field curvature of the user's shooting target; improve the imaging quality and shooting efficiency of the edge of the field of view;
- It 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;
- SV209 0.8x reducer has a metric 63x1 thread; the telescope reducer flattener screws into the focuser to ensure a secure connection.
SV209 0.8x Reducer/Field Flattener for SV550 122mm f/7 Triplet APO Refractor
How To Use
1. SV550 122mm APO Telescope 2. Remove the adapter 3. Connect SV209
The Component of SV209 Reducer/Field Flattener
The reducer/flattener threads into the focuser for a secure connection. The threading is metric 63x1.
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.
Back Focus Of The SV209 - 55 mm
Back focus is 55mm from the shoulder of the reducer to the image plane, the standard spacing for DSLR camera bodies.
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.
| Brand | SVBONY |
| Optical Tube Length | 120 Millimeters |
| Eye Piece Lens Description | FMC |
| Objective Lens Diameter | 50.8 Millimeters |
| Telescope Mount Description | Equatorial Mount |
| Product Dimensions | 5"D x 4"W x 3"H |
| Focus Type | Manual Focus |
| Power Source | Focal Reducer |
| Finderscope | Straight-Through |
| Item Weight | 0.45 Kilograms |
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Features
- 1.This 0.8X focal reducer/field flattener is designed specifically for prime focus astrophotography with the SVBONY SV550 122mm f/7 apo refractor;
2.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;
3.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;
4.The reducer/flattener threads into the focuser for a secure connection. The threading is metric 63x1;
5.Back focus is 55mm from the shoulder of the reducer to the image plane, the standard spacing for DSLR camera bodies. -
Package Includes
1. SV209 0.8x Reducer/Field Flattener
2. 2PCS Dust Cover
