Products in the Same Family
Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
Stress Free, Secure Transactions
You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we replace it. We make sure your product arrives exactly as you would expect it to; we promise.
We also ensure privacy protection. We never keep any of your credit card information on file and any of your personal data is stored according to our policies.
30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
Product Description
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.
What's in the Box
Specifications
| 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 |