SPECIFICATIONS

Barrel Size: other,1.25"

Brand Name: svbony

Color: Black

Exit Pupil Distance: 18mm - 16.3mm

Eye Relief: 18mm - 16.3mm

Field of View: 60 degrees

Field of view: 60~40°

Focal Length: 7-21mm

Focal length: 7-21mm

Focus Type: ZOOM

Interpupillary Dist: 15mm

Lens Coating: FMC

Meterial: Metal +Optic Glass

Model: Zoom eyepiece

Model Number: SV135

Net Weight: 133g / 4.67oz

Overall length: 93mm

Rubber Eye Guard: Yes

Thread Size: M28.5*0.6

Type: Monocular

Zoon Type: Linear

 

Svbony 7-21mm Zoom Eyepieces Review

 

Author:Astroromantik
https://www.youtube.com/watch?v=EWmDIGVA4XI

SV135 7mm to 21mm 1.25inch Zoom Eyepiece

Focal length: 7mm - 21mm
A: 6-element 4-group structure/B: 5-element 3-group structure/D:7-element 4-group structure
Field of view:A: 57 - 40° /B: 52 - 36° /D:60 - 40°
Eye relief: 18mm - 16.3mm
Fully multi-coated optics
1.25” interface & M28.5*0.6 thread

Focal Length: 7mm to 21mm

Zoom eyepiece brings great convenience to visual astronomy that there are no swapping between eyepieces to change magnification and there is no need to break away form your observing to change the focal length. And the 6-Element 4-Group optical design for superior optical performance.

Field of View: 57-40°

Equipped with a generous 40° to 57° field of view and a non-click stop adjustment mechanism, this eyepiece allows smooth transitioning between focal lengths, ensuring that the observer can find the perfect combination of field of view and magnification that the target object and seeing conditions will allow.

 

Field of View: 52-36°

Field of View: 60-40°

FMC Optics & Edge Blackened

Fully multi-coated optics and that the edge of every glass is blackened ensure high light transmission and reduce stray light for excellent and high-contrast images.

Eye Relief: 18mm - 16.3mm

Eye relief seems much more important for glasses wearers, whether you have a poor sight or wear sunglasses on a strongly sunny day. And this eyepiece’s eye relief is 18-16.3mm, comfortable for viewing with or without glasses.

1.25” Interface & M28.5*0.6 Thread

The eyepiece is threaded for a filter (standard M28*0.6 female thread) and the interface diameter is1.25” for connecting to a telescope for visual celestial astronomy, like moon and high powered terrestrial targets at a broad range of focal lengths.

Specifications:

1.Brand: SVBONY
2.Model: SV135
3.Focal length: 7-21mm
4.Zoon Type: Linear
5.Lens structure: 6PCS / 4group
6.Eye Relief: 18mm - 16.3mm
7.Interpupillary Dist.:15mm
8.Barrel Size: 1.25"
9.Field of view: 57~40°
10.Coatings: Fully Multi-Coated-Green
11.Rubber Eye Guard: Yes
12.Material: Metal
13.Color: Black
14.Thread Size: M28.5*0.6
15.Overall length: 93mm
16.Net Weight: 133g / 4.67oz