Manufactured by: Stellarvue
Model: SV50APO


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This is the little telescope that could. Just introduced at the NEAF show, this telescope is a fully featured apochromatic refractor that nearly fits in your pocket! We started with an ultra-high contrast, ED apo doublet objective and mounted it in our Instrument White aluminum tube. We miniaturized our venerable 2.5” rack and pinion focuser, retaining the smooth rack and pinion, dual speed mechanism and full 360 degree rotator. This focuser is “just too cute” but it is fully functional, precision made and threaded for both visual and photographic guiding accessories. The telescope comes complete with a mini clamshell, Vixen mini rail and an airline carry-on case. The case holds the telescope with visual back and many optional accessories including a star diagonal, erecting prism, and eyepieces. This is the ultimate guide scope, finder scope, birding scope, and travel scope. Don’t leave home without it! 

SV50A is a super compact ED Apochromatic refractor telescope. It has a high performance 50 mm f-6.6 (330 mm focal length) extra-low dispersion, edge blackened doublet objective.

Fully multi-coated objective: This color-free, high contrast ED lens has extreme broadband multi-coatings on all four lens surfaces. These coatings transmit light above and below the visual spectrum, which is important to minimize reflections. 

Lightweight aluminum tube and dew shield: The tube and dew shield are made of aluminum and painted Instrument White. This tube is extremely durable and will work well when using the telescope as a guide scope. The dew shield retracts to reduce the length of the telescope. The dew shield minimizes dewing effects and serves as a lens shade.

Internal tube treatment: The tube interior including the long focuser draw tube is painted black inside to eliminate tube wall reflections.

Mini dual speed, rack and pinion focuser with precision rotator and bearings: This telescope includes a unique miniature version of the venerable Stellarvue 2.5” dual speed rack and pinion focuser. It has the same type of 360 rotator, a precision rack and pinion, small 11-1 dual speed mechanism and it is threaded to accept both visual and photographic accessories. The focuser comes with a 1.25” visual back and will accept a 2” SCT diagonal.

Mini adjustable clamshell with Vixen mini rail, shaped mounting base: The telescope includes a mini version of our clamshell and has the same “easy-one-touch” balance. Also included is a dovetail for mounting a reflex finderscope. The clamshell will attach to any mount using the Vixen rail, and can be adapted to use the Losmandy system and will instantly attach to any heavy duty camera tripod.

Supplied accessories: The SV50A comes with clamshell, reflex finderscope base, Vixen rail, visual back and a small travel case that is foam lined. This airline carry-on sized case will hold the telescope and a number of optional accessories including a star diagonal, erecting prism, and several eyepieces. 

Recommended accessories: In addition to the supplied accessories, you will need a star diagonal or erecting prism, eyepiece(s) and a mount or tripod for visual use. Stellarvue is currently working on a small chip photographic field flattener for the SV50 which we hope to introduce next year. In the mean time, the SV50A will serve as an excellent photographic guide scope as is, using the small point and shoot guide cameras currently available. The heavy duty rack and pinion focuser will maintain focus and alignment better than any finderscope focuser. Later this year we will introduce our mini dual axis guiding platform. This quick-release platform will mount directly to the top of our larger telescopes. It will have adjustments up and down, left and right enabling the user to point the SV50 to the exact same area of the sky as the larger scope or to center on a suitable guide star.

Light gathering and magnification power: The SV50A gathers 50 times the amount of light the naked-eye. Magnification power is dependent upon the eyepiece being used. This telescope performs well at powers ranging from 10X - 120X at night and 10X - 60X in the daytime (heat waves make spotting scopes limited to about 60X at most). Different eyepieces provide different magnification powers. Since this telescope is carefully tested in our USA facility and is free of coma and astigmatism, sharper details will be seen when viewing at higher powers compared to many mass produced, less expensive imports. Check the Recommended Accessories section to make the best choice for eyepieces.

Product Specifications


Objective Lens                                       

50 mm fully multicoated f-6.6 (330 mm focal length) ED Apo   

Tube Assembly

aluminum, painted a durable Instrument White


aluminum, painted a durable Instrument White


Mini dual speed, fully rotating rack and pinion focuser threaded to accept visual and photographic accessories. Uses an SCT thread so a 2” SCT diagonal may be used. Comes with a compression ring 1.25” visual back. Focus travel is 2 5/16”.

Mounting Ring(s)

Mini clamshell ring with easy-one-touch balancing, 1/4-20 thread for mounting to any camera tripod. Vixen mini rail included


Main tube is 2 3/8” in diameter. Telescope is 9.6” long with dew shield retracted and 11” long when extended (focuser racked in).


Only 2 1/2 pounds!


None. F2 is recommended.


C50A Travel Case

Light Gain

51 times that of the naked eye

Color Correction 1-10


Contrast 1-10


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