Q&A about the SV230 Zoom Eyepieces

Introduction:

In this blog post, we will address some common questions and provide answers regarding the SV230 zoom eyepiece. We understand that customers may have specific concerns or queries, and we aim to provide thorough explanations to help clarify any uncertainties about this product.

Q: will be built with tight enough tolerances to allow them to be used in a binoviewer? I had previously used the svbony 8-24mm zoom telescope eyepiece, but they only worked at the two extremes of the focal lengths, 8mm and 24mm. Any intermediate focal lengths created issues with merging the two images, most like because of low tolerances in the zoom mechanism creating optical misalignment between the two eyepieces.

A: Yes, the optical characteristics of SV230 are particularly suitable for use in binoviewer scenarios. In order to meet the needs of binoviewer, we have added a positioning bead function (SV215 zoom eyepiece has this function) to ensure that you can accurately control the focal length values ​​of the two eyepieces in the binoviewer to remain consistent. In addition, although the outer diameter of the eyepiece optical glass is very large, for the needs of binoviewer, we have controlled the maximum outer diameter of the entire eyepiece to be less than 60mm.

Q: Why aren't the 1.25 and 2 inches barrels blackened? I have had eyepieces where I had to change the barrel because of the reflective surfaces introducing extra glare and reflections that reduce contrast.

A: Thank you for your feedback. Here is the response:

1. Our eyepiece design takes into consideration the issue of stray light. We have applied anti-reflection coatings to all the edges of our optical glass and employed a blackening treatment on all internal metal parts.

2. Regarding your concern about the non-blackening issue with the 1.25-inch & 2-inch adapters, let us explain further. The effective clear aperture of this eyepiece is approximately 23mm, so the 1.25-inch to 2-inch adapter primarily serves as a conversion tool. The 1.25-inch barrel, which connects and accommodates filter threads, does not have the blackening treatment, but it also does not cause unnecessary reflections.

3. Both the 1.25-inch and 2-inch adapters are made of stainless steel.

4. This adapter design has been tested and verified on our SV215 Planetary Zoom Eyepiece and APM 7.7-15.4mm eyepieces, and it does not cause unnecessary stray light issues.

Conclusion

The above are our answers to some of your questions, and we hope that they can answer your questions. In addition, our new products are on pre-sale at the price $299.99. Welcome everyone to visit the svbony.com to purchase  SV230!