svbony

Svbony provided Svbony SV503 80ED F7 Doublet Refractor for my review. This is a small 80mm refractor with a doublet lens, one of which is made of S-FPL51 glass. The use of ED glass provides a significant reduction in color halo (longitudinal chromatic aberration) around bright objects compared to a classic achromatic refractor with the same focal length. Also for review, I received a native Svbony SV193 0.8x field-flattener reducer for this specific refractor.

Declared specifications:

Model SV503
Aperture of objective lens 80mm
Focal length 560 mm
Focal ratio F7
ED Glass S-FPL51
Lens Coated Ultra-wideband coating(SMC)
Objective Lens type Double separation lens structure
Limit magnitude 11.6
Light-gathering Power 130.6x
Resolution 1.5 Arcseconds
Tube Material Aluminum
Focuser 2 inch Dual speed focuser
Reduction ratio 1:10

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Saturn, November 18, 2021, 18:05

Saturn, November 18, 2021, 18:05

Equipment:
-Celestron NexStar 8 SE telescope
-long Barlow lens cell 2x
-extender
-Svbony ADC
-extender
-QHY IR-cut filter
-QHY5III462C camera.
Processing: stacking 5000 frames from 43016 (Autostakkert), wavelets and deconvolution (AstroSurface).
Location: Russia, Anapa, backyard.

Svbony company has kindly provided me with several eyepieces for testing. One of them – SV190 18mm 1.25″ Ultra Flat Field Eyepiece FMC. A flat field (no curvature), a large eye relief (20 mm) and a field of view of 65 degrees are declared. Interesting!

The focal length of 18 mm is one of my favorites, as it is especially in demand with “fast” telescopes (f\5…f\6) when observing deep space objects (galaxies, nebulae, clusters). With “slow” telescopes (f\8…f\12), the eyepiece can be used for observing the Moon and bright compact objects in deep space.

Svbony SV190 18mm 1.25

Svbony SV190 18mm 1.25″ Ultra Flat Field Eyepiece FMC

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