This sv550 prime focus photography, also known as direct focus photography, is a method of directly using the telescope to take pictures without adding any optical objects between the telescope and the camera.
In Stock
SVBony is breaking the “Cheap product” stigma with this one.
Like most people likely reading this review, I was intrigued by how an 80mm APO triplet could be going for 50-75% less than all the others. I wondered if it was just bad manufacturing or if it was bad image or if there was some other hidden reason why it was so much cheaper. Still, I bit the bullet and got it with the thought that I could just return it if it was really that bad. Spoiler: it wasn't bad. In fact, it's much better than I could have predicted.
80mm f/6. for 480mm of focal length. Get that paired with the 1x field flattener and you get true, flattened 480mm images. When I first got it, I had my back spacing between my camera and the flattener off by ~8mm unknowingly, so the first images I got from it had me ready to claim to the world that I had found the flaw that caused it to be so much cheaper. The corners were oblong and not very good quality. After learning that I was wrong and putting the right spacers in, all that went away and the images I was able to capture had me shaking my head in disbelief. They are clear from corner to corner and the colors all look great.
Model | SV550 |
Type | Refractor |
ED Glass | FPL51 |
Coating | SMC |
Aperture | 80mm |
Focal length | 480mm |
Focal Ratio | f/6 |
Limit magnitude | 11.6 |
Resolution | 1.45 arc seconds |
Lens design | Apochromatic |
dovetail plate length | 150-175mm |
barrel weight | 2900g |
mirror Brief Size | 377.8mm |
Net weight | 3750g |
Gross weight | 3850g |
Model | SV209 |
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(SupportFull Frame Sensors) |
Number of elements | 2 lenses |
Factor | 0 - no change of focal length to the focal plane |
Coating | FMC |
Diameter of the housing | 67mm |
Length | 5 mm without the male thread |
Model | SV195 |
Size | M42*0.75 |
Male thread | Canon EF-Mount |
Color | Black |
Material | Metal Aluminum |
Net weight | 44.7g |
Here are three camera adapters to choose from:
1.M48*0.75 Nikon Adapter
2.M48*0.75 Canon Adapter
3.M48-NEX Sony Adapter