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Clickstop Mechanism

The SV215 eyepiece brings a whole range with focal lengths from 3mm to 8mm in a single high-quality eyepiece! It lets you continuously zoom with Click-stops at 8, 7, 6, 5, 4 and 3 mm.

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The field of view will not change with the change of focal length, the process of doubling to give customers a fixed point to pull into the visual enjoyment.

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Brand  SVBONY  SVBONY  SVBONY
Model  SV245 SV230 SV215
Focal Length  8mm-16mm/0.31-0.63"  8mm-20mm 3-8mm
Apparent Field of View  63°  57°- 72° 56°
Barrel Size  1.25" & 2" 1.25" & 2" 1.25"
Coatings  Fully multi-coated  Fully multi-coated  Fully multi-coated
Blackened Lens Edges  Yes  Yes  Yes
Eye Relief  18-17mm/0.71-0.67"  17-19mm 10mm
Parfocal  Yes  Yes  Yes
Rubber Eye Guard  Yes  Yes  Yes
Clickstop Click Design  Yes  Yes  Yes
Dioptrix Mounting  Support  Support No
Material of Barrel  Stainless steel-1.25" & Aluminum Alloy-2" Stainless steel Stainless steel
Filter Threads  M28.5x0.6 & M48x0.75  M28.5x0.6 & M48x0.75 M28.5x0.6
Groups/Elements  5/8  6/9  4/6
Outer Diameter  60mm/2.36" 60mm
Net Weight  486g/17.17oz 500g/17.66oz
Size 129*60mm/5.08*2.36"

Features

  1. 1. SV215 zoom eyepiece is a good assistant for you to observe and take pictures of the planets; it is a good helper for the amateur astronomers to observe Venus; Mars; Jupiter; Saturn and so on
    2. Adjustable focal length; SV215 3 mm to 8mm zoom eyepiece equivalent to multiple eyepieces; SV215 eyepiece is much better than the kit eyepieces; this helps you to zoom in and out rather than changing lens
    3. Parfocal across the entire zoom range; minor tweaking may be necessary; you do not need to refocus every time you change the focal length
    4. Constant field of view and eye relief; the apparent field of view and the usable eye relief to stay the same as the focal length changes
    5. Click and stops design; there are clicks and stops as you pass through the marked zoom levels; easy to use even in the dark
    6. Zoom ring moves smoothly; the zoom is smooth and gradual as you twist the eyepiece; it is very hand-friendly
    7. 6-element of 4-group lens structure; fully multi-coated optics for remarkable sharpness; contrast and color correction
  2. 8. Smooth zoom action with click-stops at 3, 4, 5, 6,7 and 8mm for quick changes to precise preset magnifications
    9. Parfocal across the entire zoom range (minor tweaking may be necessary, however).
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