- SV209 is a special field flattener for SV550 80F6 OTA, which can effectively improve the image quality problem of SV550 OTA fringe field curvature; At the same time, the focal length and focal plane position of the primary mirror remain unchanged;
- The package of SV209 is equipped with an M63 extension tube and an M48 adapter ring to ensure that the back focal length of the flat field mirror is the astronomical conventional 55mm length;
- The effective field of view of the 45mm large target surface supports not only half-frame cameras; but also full-frame cameras;
- Built-in 2-inch filter mounting thread; supports 2-inch filter installation; customers do not need to buy a filter adapter ring separately;
- Maximum working distance from the M63x1 internal thread: 103 mm - space enough for almost all adaptations.
Note: The SV550 80 APO is designed with f/6 focus ratio. When reducing the focus further, the image quality will not be guaranteed. This is why we produce 1.0x flat field instead of 0.8x.
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SV209 1.0x Flattener Corrects the Field for SV550 80F6 Astrophotography
The Calculation Method of 55mm Back Intercept
First unscrew the 2-inch adapter ring of the SV550 80mm APO, and then connect the three parts of the field flattener. The installation sequence of the three parts is shown in the figure above(don't confuse the order) . Then connect the mount (not included) and camera compatible with Canon to shoot.
SV550 80 OTA Field Flattener
Most astronomical telescopes have a certain field curvature problem, which can be improved with SV209. The SV209 is a special field flattener for SV550 80F6 OTA, which can effectively improve the field curvature of fringe field images. Great for astrophotography.
M63 Extension Tube
Equipped with M63 extension tube and M48 adapter ring to ensure that the back focal length of the field flattener is 55mm in astronomical tradition.
Thread size: M63x1 male thread
M48 Adapter Ring
Built-in 2-inch filter mounting threads support 2-inch filter mounting.
By connecting the adapter ring, you can match any 2-inch filter you need to meet your different shooting needs.
Connectable CAA Field Conditioner
SV209 can be installed to create flat images. At the same time, it can be installed in combination with the SV210 (sold separately) to adjust the field of view of the image.
Once again
Works Very Well !
Must have accessory for SV550
| Brand | SVBONY |
| Model | SV209 |
| Additional Thread | M63x1 female thread for photo adaptions |
| Connection at Telescope Side | M63x1 male thread |
| Connection 1 at Camera Side | M63x1 thread female - working distance 103 mm |
| Connection 2 at Camera Side | M48x0.75 male thread - working distance 55 mm or 91.5 mm |
| Fully Illuminated Field | 45 mm（Support Full Frame Sensors） |
| Number of Elements | 2 lenses |
| Factor | 1.0 - no change of focal length to the focal plane |
| Coating | FMC |
| Diameter of the Housing | 67mm |
| Length | 87.5 mm without the male thread |
Features
1. SV550 80 OTA Field Flattener
2. M63 Extension Tube
3. M48 Adapter Ring
4. Connectable CAA Field Conditioner
5. FMC Coating
6. 2-inch Interface
7. Effectively Improving the Field Curvature Problem at the Edge of the Image
