SV245 Zoom Eyepiece Full Reviews

SVBONY has always been committed to providing high-quality telescope accessories, and the SV245 zoom eyepiece is no exception. Are you interested in the SV245, and would you like to learn more about it? Fortunately, we are grateful that a reviewer, Bogdan, shared his detailed review, offering valuable insights into the product's design, optical performance, and overall usability. Here are the main takeaways from the review, let's take a look!

Hardware Evaluation: Appearance & Features

1. Appearance Design

・Overall look - well made
・2 inch size premium design
・One pair easily for binoviewing configuration

2. SV245 Multi-functional Ports
・1.25-inch & 2-inch dual interface: The 2" port of the SV245 reduces backfocus when used with a Newtonian Reflector by eliminating the need for a 1.25" adapter, offering a few millimeters of savings, and can be further optimized with a 2" to T2 adapter for more precise focus adjustments.
・Filter Mounting Thread: There are filter mounting threads with 1.25-inch and 2-inch interfaces, which provides additional convenience when using filters.
・Diopter Installation: Compatible with all mainstream astigmatism correctors on the market, solving vision focusing problems caused by astigmatism, you can find the same design on SV230 Zoom.

3. ClickLock Design

・The precision-machined components provide a highly effective retention mechanism that securely holds, you can hear and feel in darkness without looking.
・Having a step for each focal length is such a great and helpful feature. This is important as you operate the eyepiece in the dark where it is very hard to read the labeling. Habing haptic and acoustic feedback you can simply count the steps without having to look at the eyepiece.

Optical Performance

1. 63-Degree Constant Field of View

Optical tests showed that the AFOV is constant from 8 to 16mm of focal length

2. Parfocal Performance

Comparisons to Other Eyepieces

1. Comparisons to the Baader Hyperion Mark IV 8mm-24mm

・Overall on pair or slightly better image quality
・Better AFOV - more immersive
・Viewing comfort is similar
・Similar build quality

2. Comparisons to SV230 Zoom Eyepiece

・ Comparable image quality
・ Slightly better viewing comfort - less kidney beaning
・ The thicker rubber ring around the waist of the eyepiece feels good as the SV230
・ The parfocal aspect of the SV245 is almost the same as the SV230
・ While not incorporating aspheric surfaces, the SV245's spherical lens configuration has been optimized to minimize aberrations effectively
・ Both support astigmatism corrector installation

Recommended combination

1. MK105/MK127 OTA + SV245 zoom eyepiece for visual planetary observations

2. MK105/MK127 + SV245 zoom eyepiece + SV214 Pro Phone Adapter for planetary astrophotography

3. SV245 zoom eyepiece + SV216 Barlow Lens for wide range focal length options covering medium and high power observation scenarios

Usage Scenarios: planets & deep space & moon phases

1. Planets and the Moon
2. Longest focal length setting is a little long for DSO observations

Conclusion

The SV245 parfocal eyepiece has proven to be a highly capable and well-rounded option for astronomers, offering excellent optical performance, a comfortable user experience, and versatile compatibility with various telescopes. Whether you're observing planets, the Moon, this clickstop eyepiece shows promise in both design and function.

A big thank you once again to Bogdan for the review of the SV245 eyepiece. If you have any further questions, feel free to leave a comment below or email us at support@svbony.com to share your thoughts!