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Is the SV550 telescope worth buying?
The aperture is 80mm. The focal length is 480mm, so the focal ratio is 6. That means the SV550 can gather most of the light, no matter what your object is, planetary or deep-sky object. The 80mm can both satisfy your need.
The fully multi-coated optics increase the light transmission and deliver bright and crisp images.
The blackened inside to eliminate the stray light. And also the extendable sunshade also can avoid stray light.
The hoop can dismantle and it comes with a vixen-style dovetail which can easily connect to an equatorial mount. With the hoop, you can assemble the guide scope or handlebar which is convenient to carry around.
SV550 comes with a dovetail bracket, so you do not worry about what size dovetail bracket should you buy. This is considerate. This part can connect with the finder scope.
The 1:10 dual-speed focuser is super convenient to adjust. And the back focus stroke is 90mm, satiating the astrophotography needs.

Not really a first light, but the first one I did fine tuned with sv550 triplet. Very difficult conditions: no astronomical night, shot from the center of the city. However, I can say a few warm words about this refractor. Its is very well built. Does not show much chromatic aberration. Only the flattener's backfocus is not exactly 55 millimeters,but a little over. It can obviously be tuned with appropriate distances.
I have new photo made with sv550,From day to day I like it more and more!
In fact, we are gradually getting better product reviews, if you are interested, consider buying it!
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