This 102mm telescope is $230 right now!

Folks, if you’re looking for a solid, budget-friendly refractor, the SVBONY SV48P is a 102mm f/6.5 achromat that punches well above its price tag. This thing has a fully multi-coated doublet lens, giving you crisp views with minimal chromatic aberration—especially for the price.

Now, the 2.5-inch dual-speed rack-and-pinion focuser is a nice touch, making fine adjustments super smooth—though some users have reported it needs a bit of tweaking out of the box. And the 360-degree rotatable focuser? A real plus for getting the perfect framing in astrophotography.

At just $230 (right now), this is an absolute steal—and get this: it makes a fantastic large finder or guide scope! Weighing in at about 7 lbs, it’s portable, easy to mount, and even has a sliding dew shield to keep that pesky moisture at bay.

For wide-field astrophotography, you might want to add a field flattener to clean up the edges, but overall, this is a rock-solid budget refractor for anyone looking to dive into the hobby without breaking the bank.

SVBONY SV48P 102mm Achromatic Telescope Refractor specifications

• Brand: SVBONY
• Model: SV48P
• Optical Design: Refractor
• Caliber: 102mm
• Optic Coated: FMC
• Objective Lens: Doublet air spaced achromatic design
• Focal Length: 663mm
• Focal Ratio: F/6.5
• Eyepiece Barrel Diameter: 2-inch (with 1.25-inch adapter)
• Focuser: 2.5-inch RAP Double Speed Focuser
• Millimeter markings on focuser drawtube: Yes
• 360-degree rotatable: No
• Dust Plug: One 1.25-inch dust plug included
• Finder Scope Bracket: Yes
• Mount Type: Dovetail Plate
• Dovetail Plate Length: 210mm
• Net Weight: 7.49 lbs (3400g)
• Dimension: 720 × 270 × 230mm
   

The sliding dew shield and metal screw-on dust cover protect the objective lens from moisture and debris. The inclusion of a finder shoe and rotating rings enhances its versatility, allowing for the attachment of various accessories. Many users have praised the SV48P for its optical clarity and mechanical reliability. The telescope's minimal chromatic aberration has been highlighted, especially given its achromatic nature. Some users have reported initial stiffness in the focuser, which often resolves after regular use. The screw-on lens cap, while secure, may require careful handling to prevent cross-threading.

The SV48P's combination of a fast focal ratio and quality optics makes it suitable for wide-field astrophotography. Its robust focuser can support various imaging accessories, and the 360-degree rotation aids in composing shots without altering the telescope's position. However, as with many refractors, using a field flattener is advisable to achieve optimal edge-to-edge sharpness in photographs.

Grab an inexpensive 102mm telescope right now for just $230!

Ed Ting's review of the SVBony SV48P 102mm f/6.5 refractor OTA

The world of amateur astronomy has always been one of fascination and exploration, where enthusiasts seek the best equipment to observe celestial wonders. Over the years, telescope manufacturers have constantly attempted to balance affordability with performance, and one company that has gained a reputation for delivering budget-friendly optical equipment is SVBony. Their latest offering, the SVBony SV48P 102mm f/6.5 refractor optical tube assembly (OTA), has drawn considerable attention. But does it live up to expectations, and are we truly seeing a return of affordable bargains in astronomy equipment?

The SVBony SV48P is not an entirely new concept but rather an expansion of a previous model. A year ago, an impulse purchase of the 90mm f/5.6 version of this telescope demonstrated SVBony’s potential to offer decent optical performance at an incredibly low price. The 90mm model was available for just $199 at the time, making it an attractive option for beginners and seasoned astronomers alike. However, SVBony was eager to showcase their latest version, the 102mm model, which they believed would offer a noticeable improvement. Given that the difference between a 90mm and a 102mm refractor is more significant than mere numbers suggest, astronomers familiar with refractors know that even a small increase in aperture can result in better light-gathering ability and resolution.

When first testing the SVBony SV48P, the initial sample was a pre-production version sent before the official release in November 2024. Unfortunately, that particular unit suffered from optical issues. However, SVBony acknowledged the problem and sent a replacement that was representative of what customers would receive in retail. The updated model was designed to compete in the affordable refractor market and targeted astronomers looking for a solid entry-level OTA.

The SV48P’s specifications are carefully chosen, with the 102mm f/6.5 design being a deliberate attempt to mimic some high-end refractors. While the optical performance may not be on the same level as premium manufacturers, it demonstrates a company willing to aim high. SVBony has developed a reputation for offering cost-effective equipment that provides surprising value for its price. The retail price of the SV48P OTA is $329, but it is frequently discounted, and at the time of review, it was available for just $230. This price raises an interesting question: are we seeing a resurgence of high-value bargains in the astronomy market?

One of the first noticeable aspects of the SV48P is its build quality. At this price point, manufacturers often cut corners in materials, but SVBony has delivered a surprisingly well-made product. The only significant concession to cost is the plastic lens cap, which is a minor drawback considering the price. The lens cap screws off in an unusual way, taking the entire mirror cell with it, which means collimation is fixed from the factory. The telescope also features knife-edge baffles inside, a feature typically found in more expensive models, which helps reduce stray light and improve contrast.

A significant concern with budget telescopes often lies in the quality of the focuser. Previous iterations of SVBony’s telescopes suffered from loose and wobbly focusers that required adjustments. Fortunately, the SV48P has improved in this regard. The two-speed focuser is well-made, with clear gradations on the drawtube for precise focusing. It even cosmetically resembles a high-end Feather Touch focuser, though in operation, it provides a very different experience. While premium focusers often feel effortless, the SV48P’s focuser has noticeable resistance and a slightly grainy texture. Some users might prefer this tactile feel as it provides a sense of control when adjusting focus. Ultimately, it performs well, allowing for accurate focusing on celestial objects.

The telescope’s tube rings and mounting system are also notable. Unlike the 90mm version, which had a more awkward arrangement requiring the visual back to be removed to detach the rings, the 102mm version adopts a more conventional setup. The rings attach via four hex-head screws, offering a mounting system similar to that found on premium astrophysics telescopes. This improved design allows for more flexibility in mounting the telescope on various setups.

In terms of weight, the fully assembled OTA with a red dot finder, a generic 2-inch diagonal, and a 28mm Orion Deep View eyepiece comes in at about 10 pounds. This remains a manageable load, making it suitable for a variety of mounts. During testing, the telescope was used on several mounts, including the Vixen Porta, an AVX, and the SVBony SV225 mount head. The SV225 mount, a recommendation from several users, was particularly interesting and will be covered in a separate review. Mounted on a tripod with AVX legs and an M10 center bolt modified to accept a 3/8-inch bolt, the setup was sturdy and easy to maneuver, with slow-motion controls providing precise adjustments.

Field performance is where any telescope must prove itself, and the SVBony SV48P delivered solid results. During winter observations, it provided excellent views of deep-sky objects, including the Orion Nebula, the open clusters in Auriga (M37, M36, and M38), M35 in Gemini, and the Pleiades. Even the Andromeda Galaxy, a challenging target for many beginners, was easily visible. With a quality refractor, contrast is a crucial advantage, and the SV48P’s optics allowed for satisfactory views of these celestial showpieces.

SVBony markets the SV48P as an astrophotography tool, though this claim should be taken with some reservations. While it can serve as a learning tool for aspiring astrophotographers, its achromatic optics inherently limit its performance for high-quality imaging. The telescope was tested with a ZWO ASI 120MM-S camera, and while lunar imaging yielded decent results, deep-sky imaging presented challenges. The achromatic design results in noticeable blue halos around bright stars, a common issue with non-apochromatic refractors.

Despite these limitations, some impressive images were captured using a Hutch-modded EOS 5D camera paired with a Tele Vue field flattener. Targets included the Crescent Nebula, the Pac-Man Nebula (NGC 281), and the Andromeda Galaxy. While the blue halos were present, careful post-processing in software like Photoshop or PixInsight could mitigate these issues to some extent. However, beginners should note that astrophotography requires significant investment beyond the OTA itself. The SV48P may be affordable, but the total cost of a functional imaging rig, including a mount, camera, guiding system, and processing software, can easily reach several thousand dollars.

In planetary and lunar observation, the SV48P performed well, handling magnifications of 125-150x without issue. Higher magnifications were possible, but mount stability became a limiting factor. The contrast and sharpness were impressive for an achromatic refractor in this price range, making it a good choice for general-purpose observing.

While this review is based on a single unit, broader user experiences will be valuable in assessing consistency in manufacturing quality. Those who purchase the SV48P are encouraged to share their experiences to provide a more comprehensive picture of its performance. It is also essential for beginners to understand that purchasing an OTA is just the beginning of an astronomical journey. Essential accessories such as finders, diagonals, eyepieces, and mounts can significantly increase overall costs.

Despite these considerations, the SVBony SV48P exceeds expectations for its price. It is an excellent option for those looking for an entry-level refractor, a secondary grab-and-go telescope, or even an introductory astrophotography instrument. While it does have limitations, particularly with color correction and imaging, it provides remarkable value. The return of affordable, well-made telescopes like the SV48P suggests that bargains may indeed be making a comeback in the amateur astronomy market. If SVBony continues on this path, they could play a significant role in making astronomy more accessible to a broader audience.

With little to criticize at this price point, the SVBony SV48P stands as a testament to the fact that good quality optics don’t always have to come at a premium. For those seeking a cost-effective yet capable refractor, this model is well worth considering.

Are Bargains Back? Review of the SVBony SV48P 102mm f/6.5 refractor OTA

Buy the SVBONY SV48P refractor