Model |
SV198 |
Type of Optics |
Achromat Refractor |
Lens Structure |
2-Elements/ 1Groups |
Tube material |
Aluminum |
Aperture |
50mm / 1.97in |
Focal ratio |
f/4.1 |
Focal Length |
206.6mm / 8.13in |
Coating |
Fully multi-coated |
Blackened Lens Edges |
Yes |
Focuser |
Dual Helical + Telescopic Design |
Dual Helical Focuser Focusing stroke |
11mm |
Focusing seat accuracy (Dual Helical Focusing) |
0.1mm |
Rough Focusing stroke |
38mm |
Focusing seat accuracy (Rough Focusing) |
1mm |
Connection thread to Eyepiece |
1.25" and T2 |
Base installation type |
Vixen standard interface |
Tube diameter |
55.5mm |
Dew cap diameter |
58mm |
Total Length |
223mm |
Net Weight |
770g / 28.1oz |