Svbony SV503 70ED F7 Doublet Refractor review
https://star-hunter.ru/en/svbony-sv503-70f6-ed-telescope-review/
Author:STAR HUNTER
https://www.youtube.com/watch?v=pmaswFfRXuk
SVBNOY SV503 70/420 ED Extra Low Dispersion Achromatic Refractor OTA Micro-reduction RAP Focuser for Astrophotography
https://www.youtube.com/watch?v=8P6i7KMrmDE
Author:3D Astro(YouTube)
70F6 ED Astronomical Telescopes OTA
ED Glass: S-FPL51
SMC (Super Multi-coating) Objective
Dual-speed Rack and Pinion Focuser
1.97 Arc-second Resolution
CNC Machined Technology
Compatible with all 1.25”/2” accessories
Extra-low Dispersion Glass: S-FPL51
ED(Extra-low Dispersion) S-FPL51 is built in SV503 astronomical telescope. ED glass minimizes the effects of the secondary spectrum and reduces chromatic aberration to a remarkable degree. The high-quality 2-Element objective provides sharp and high-contrast images for travel and mobile use.
Ultra-wideband SMC
SMC is claimed as a remarkable seven-layer lens coating process that cuts the reflection ratio down to just 0.2% per lens surface. The result is a dramatic improvement in both color fidelity and brightness and the elimination of flare and ghost images.
Dual-speed Rack and Pinion Focuser
The gear ratio of the dual speed 2-inch toothed focuser is 1: 10, which makes it easy to achieve accurate focus. The dual speed focuser can provide two focusing speeds by using a set of co-axial knobs, one for fast focusing and the other for fine focusing.
90mm Back Focus
The 90 mm back focus and 360 degree adjustable focuser are sufficient for your astrophotography needs, allowing perfect framing of your astrophotography. And the 2" RAP (rack and pinion) focuser holds more-than-5kg heavy photographic accessories safely.
1.97 Arc-second Resolution
The SV503 ED astronomical telescope can reach 1.97 angular seconds to let you see finer details either in astronomy or wildlife viewing.
Comes With a 2"-1.25" Adapter
The telescope scope focuser comes with a 2 inch to 1.25 inch adapter. So that you could also use all your 1.25 inch accessories with the SV503 telescope.
CNC Machined Technology
Metal Hoop with Dovetail
The SV503 comes standard with adjustable tube rings and dovetail which allows it to attach to most telescope mounts. In addition, there are 1/4 inch threaded holes on the dovetail plate to attach to tripods and M6 holes on top of the tube rings to attach a guide scope.
Well Protected
Specifications:
Optics :
1.Type: Refractor
2.Type of build: Doublet air spaced achromatic
3.Glass Grades: S-FPL51
4.Aperture: 70mm / 2.75-Inch
5.Focal length: 420mm
6.Aperture ratio: f/6
7.Resolving capacity: 1.97"
8.Limit value: 11.3
9.Light gathering capacity: 100x
10.Max. Useful magnification: 140x
11.Tube outer diameter: 88mm
12.Tube material: Aluminium
13.Coating: SMC
Focuser:
1.Type of build: RAP ((rack and pinion)
2.Connection: 2-inch
3.Connecting threaded socket: M54*0.75
4.Ring clamp: Yes
5.Rotating: Yes
6.Gear reduction: 1:10 Fine movement
The packaging includes:
1.SV503 70F6 ED Astronomical Telescopes OTA
2.Pair Telescope Tube Ring
3.2" -1.25" Adapter
4.Dovetail Plate
5.Lens Cover
6.1.25" Dust Cover
Buyers Show
M31 10/02/2022
Andromeda Galaxy taken with short shots, in just over 2 hours during a test phase, with the Moon at 68%
Svbony 70ED with 0,8x reducer
SkyView pro synscan goto
Nikon d7100
Ir / uv cut filter
cr:Riccardo Pezzella
Picture one：M17 Gain300 8 seconds exposure 32 stacks of QBP+UVIR filter ASI482MC
Picture two：Veil Nebula Gain300 8 seconds exposure 47 stack QBP + UVIR filter
Picture three：M33 Gain500 8 seconds exposure 30 stacks no filter
Picture four：M33 Gain500 8 seconds exposure 88 stack UV / IR cut filter
