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SVBONY SV193 2 Inch 0.8X Focal Reducer / Filed Flattener Telescope Accessory for SV503 80mm F7 ED Telescope

SKU: W9152B
US$ 89.99 -33%
List Price: US$ 135.99
  • SV193 0.8x focal reducer can take dazzling celestial photos without worrying about the distortion of the star points on the edge of the photo;
  • The front is a standard 2-inch socket for connecting the main lens. The rear is a M48x0.75 thread for connecting the camera mount. Supports full-frame cameras
  • The SV193 can be connected to a standard 2" filter thread to add the light pollution filter you need;
  • The 0.8X defocus system shortens the exposure time. It can meet the needs of astronomical photographers who need sufficient exposure in a short time.
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SV193 2-Inch 0.8x Photo Reducer / Flattener for SV503 80 ED Refractors

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3-Elements 2-Groups Lens Structure

Hard Anodize Finished Aluminum Body


SV193 For SV503 80ED -- Connect With Filters

SV193 For SV503 80ED -- Connect With Cameras

SV193 Photo Reducer / Flattener For Astrophotography


2 reviews

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It does flatten the picture as long as...

The flatner works well when not adding anything between the flatner and the dslr camera. On a CCD you will need a 55mm space between the camera sensor and the flatner. DSLR camera already measure 55mm so just the flatner is the only thing needed. The flatner was made for small sensor like the one that comes with the ccd cameras so a little bit of egg shape stars might still form. You might need to process the stars with a lens distortion tool in adobe.

seems well corrected

purchased to speed up my telescope from F/7 to F/5.6. It does that and flattens the field. I am only using a 1" (16mm diag sensor) but star images appear sharp to the edge. It is well made.

Specifications:

Model SV193
Fit For SV503 80ED F7 SV503 102ED F7
SKU W9152B W9152D
Back Focus 55mm 55mm
Barrel Size 2-inch 2-inch
Threads Standard M48*0.75 M48*0.75
Lens Structure 3-Elements/2Groups
Lens Coating FMC
Blackened Lens Edges Yes
Net Weight 164g / 5.78oz / 0.36lb 177g / 6.24oz / 0.39lb

Features:

1. Designed for fixed field astrophotography with the SV503 refractor. While it will also thread through and work with other makes and models of f/6~f/7 refractors that use 2" focusers, its performance with other ranges cannot be well.
2. For faster and wider astro and terrestrial photography. After the focal is reduced, the starry sky can be captured wider, the star points are finer, and the signal-to-noise ratio is better under the same exposure.
3. In addition to shortening the focal length of the telescope for faster photography, the SV193 0.8X focal reducer/field flattener the normal field curvature inherent in all refractors.
4. The 0.8 times defocusing system shortens the exposure. It can meet the needs of astrophotographers who need sufficient exposure in a short time.
5. With SV503 refractor, it can take dazzling celestial photos without worrying about the distortion of the star points on the edge of the photo.
6. The default back-intercept is 55mm. Using the 360° field rotator at the end of the focusing tube (not included), you can meet your composition requirements without turning the main lens, and it can also meet the use of filter wheel/OAG/astronomical camera at the same time.

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