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The SVBONY 0.5X Focal Reducer is designed for telescope eyepiece photography, featuring a C-mount adapter for seamless camera integration. With a broadband green coating and a 2.5-degree field of view, this lightweight reducer enhances your stargazing experience by providing a faster system and minimizing reflections.
| Coating | Broadband green coated |
| Lens Type | 0.5x reduction |
| Field Of View | 2.5 Degrees |
| Zoom Ratio | 0.5 |
| Finderscope | Reflex |
| Compatible Devices | Camera |
| Eye Piece Lens Description | Broadband Green Coated |
| Mount | 1.25 inches mount |
| Focus Type | Manual Focus |
| Item Weight | 0.04 Kilograms |
| Exit Pupil Diameter | 0.63 inches |
| Item Dimensions D x W x H | 48D x 48W x 48H millimetres |
| Optical-Tube Length | 1.25 inches |
J**Y
Best at f/7 or higher. I used a 20mm extension tube to get close to 0.5 on my ASI120 camera.
I bought this to try to widen the star field on my f/4 guidescope. Three things I learned 1) focal reducers work at f/7 or higher. 2) The back focus for 0.5 is around 32-37mm. 3) This works nicely when screwed onto an eyepiece.
H**T
Foggy image
Foggy image, no matter what I do.Using 8" Newtonean, reducer attached to svbony 305 pro camera, the reducer is 5.5 cm from the sensor.
C**0
1.25" EYEPIECE THREAD to C THREAD
It works ... but not what I was shopping for. Nor is very adaptable.I misread the product info and thought I was purchasing a T to C thread 0.5x focal reducer. Not an eye-piece filter thread reducer.
I**N
Terrible focus
I got this lens to expand the field of view on my telescope. The first picture attached to this review is prime focus through the telescope, and as you can see it's not quite large enough to get the entire moon. The second picture is the same camera, same settings, and same weather conditions, taken through this lens. The most obvious problem is the massive glowing halo around the moon. That was present in every shot I took with the lens. Less obvious, but more problematic, is that it can't actually get things in clear focus, making it impossible to resolve fine detail. The only reason I gave this lens 2 stars instead of 1 is because it does what it is supposed to do in that it expands the field of view to allow you to see larger objects.
M**.
Making a Great scope Better...
Used Their Products Before....Never a Problem....
Trustpilot
3 weeks ago
5 days ago