SV230 Super Zoom Eyepiece: Full Reivew!

SVBONY SV230 Super Zoom Eyepiece: Full Review!

Thanks to your unwavering support and feedback, SVBONY has developed an innovative new zoom eyepiece SV230, specifically tailored to meet the needs of all of our astronomy enthusiasts. It's a super zoom eyepiece with a very wide AFOV and that is also parfocal.

The Key Features of the SV230 Super Zoom Eyepiece:

Zoom Range: 8mm to 20mm, providing versatility for various observing conditions.
Zoom Ratio: 2.5x for smooth transitions between magnifications.
Apparent Field of View: An impressive wide-angle field ranging from 57 degrees to 72 degrees.
Flat-field: Built-in flat field lens
Eye Relief: Comfortable long eye relief between 17mm and 19mm.

This eyepiece is constructed using the highest grade of multi-element aspheric and special optical glass, featuring a 6-group, 9-element optical design.

the package details

The Challenges Behind the Development

Optical Design: To ensure a balanced performance between the two key parameters of field of view and zoom ratio, multiple simulations were conducted using the optical design software ZeMax to find the optimal design balance. However, due to the complexity of optical structure design, entering each variable requires waiting for several hours to obtain calculation results. (This design process took several months.)

The greatest challenge faced in the optical design of the SV230 Super Zoom Eyepiece was the historical issue of narrow fields of view at low magnifications. This zoom eyepiece was designed to provide excellent imaging while achieving a field of view of 57 degrees at low magnification and 72 degrees at high magnification, with a zoom ratio of 2.5x. This design can compete with or slightly surpass the zoom eyepieces driven by Swarovski's flagship ATX spotting scope.

Structural Design: The effective aperture of the SV230 Superzoom eyepiece is 23mm, which is the maximum structural design size for a 1.25-inch eyepiece. At the same time, considering that some customers use binocular devices, we kept the overall field size within 60mm. However, since the maximum outer dimensions of the lens are around 58mm, our eyepiece bodies adopt a thin-wall design, which places higher demands on the metal processing and coaxiality of the barrel. Achieving this thin design without deforming the barrel during manufacturing is a significant challenge.

The Product Features are Remarkable! The Result of Our Efforts

Notable Structural Excellence:

Click Stop Design: Easy-to-use positioning beads allow for seamless zoom adjustments.
Dual Interface Design: Compatible with both 1.25" and 2" fittings.
Astigmatism Correction Support: Ready for market-leading corrective lenses to ensure crisp star images.
M43 Camera Interface: For convenient astrophotography by attaching cameras directly to the eyepiece.
Durable Stainless Steel Housing: Enhances both durability and aesthetic appeal.
Standard Filter Compatibility: Works smoothly with standard 1.25" and 2" filter threads.

Optical Performance:

Wide field of view ranging from 57 degrees to 72 degrees.
Smooth optical continuous zoom from 8mm to 20mm.
Flash Focus Design minimizes focus shift during zoom.
Equipped with high-quality double-sided aspherical lenses.
Built-in flat-field lens for consistent clarity.
Long eye relief of 17mm to 19mm for comfortable viewing.

Frequently Asked Questions

Q1: What advanced glass materials are used in the SV230 super zoom to suppress aberrations?
A1: The SV230 utilizes specialized materials such as ZlaF and ZBaF, along with aspherical lens designs, allowing it to effectively reduce optical aberrations.

Q2: What telescope parameters are suitable for the SV230 eyepiece?
A2: This eyepiece is designed to correct angular magnification distortion and optimize off-axis imaging, supporting telescopes up to F/4.

Q3: Does the SV230 include astigmatism correction lenses?
A3: While it comes with a port for attaching a correction lens, the astigmatism correction lens is not included.

Q4: How compatible is the SV230 with Barlow lenses?
A4: We recommend pairing it with premium Televue Barlow lenses. Avoid using it with budget models under $100.

Q5: Why isn’t the interior of the 2-inch adapter black?
A5: The actual product is made of stainless steel, which doesn’t require blackening due to the effective aperture of the eyepiece being 29mm.

Q6: How strong is the 2-inch adapter?
A6: Made from stainless steel, it offers much greater hardness compared to traditional aluminum adapters, giving you confidence in its strength.