Features:
Fully multi-coated Premium eyepiece zooms to any focal length between 7 mm and 21mm
Zoom from low to high power in an instant with this versatile eyepiece
Compatible with any telescope that accepts 1.25î eyepieces
6 -Element 4-Group premium optical design
Comfortable 18mm - 16.3mm eye relief more comfortable, especially for eyeglass wearers
Package Includes:
SVBONY SV135 7-21mm 1.25 inch Eyepiece
Lens Covers (Objective and Eyepiece)
Lens Cleaning Cloth
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Model | SV135 | SV170 | SV171 |
Focal length | 7-21mm | 10-30mm | 8-24mm |
Eye Relief | 18mm - 16.3mm | 17-18.5mm | 18-19.5mm |
Zoon Type | Linear | | |
Lens structure | 6PCS / 4group | 5 -Elements/-3Groups | 7-Elements/4-Groups |
Interpupillary Dist. | 15mm | | |
Barrel Size | 1.25" | 1.25" | 1.25" |
Field of view | 57° ~ 40° | 33°-51° | 38°-56° |
Coatings | Fully Multi-Coated-Green | Fully Multi-Coated | Fully Multi-Coated |
Rubber Eye Guard | Yes | | |
Blackened Lens Edges | | Yes | Yes |
Barrel Safety Recess | | Yes | Yes |
Eyecups Meterial | Metal | Metal | Metal |
Eyecups | | Twist-Up | Twist-Up |
Thread Size | M28.5*0.6 | M28.5 x 0.6 | M28.5 x 0.6 |
NO.15/25/58/80A Color Filter Kit
Since planetary surface details and atmospheric phenomena reflect sunlight as contrasting colors, you can use color filters to accentuate subtle details on planets, comets, and the Moon by selectively increasing contrast between features and markings of different hues. Simply put: using various color filters makes planetary details easier to see.
Features:
#15 Deep Yellow Planetary Filter: Boosts contrast of lunar features, accentuates red and orange features on Saturn, Jupiter, and Mars, reveals low-contrast cloud detail on Venus.
#25 Red Planetary Filter: Enhances Martian surface details in large telescopes, reveals cloud definition on Venus, accentuates bluish cloud regions on Jupiter and Saturn.
#58 Green Planetary Filter: Enhances contrast of blue and red structures on Jupiter (including Red Spot), melt lines around Martian polar ice caps, accentuates Saturn's cloud belts.
#80A Medium Blue Planetary Filter: Enhances details in Jupiter's belts and Red Spot, high clouds and polar caps on Mars, lunar surface details, Venus cloud features.
Pls note:
The filters of SVBONY are not designed for sun observation. Do not look at the sun with SVBONY filter. You would be blind if you fail to observe the warning
Package Includes
SVBONY 1.25 " NO.15 Color Filter
SVBONY 1.25 " NO.25 Color Filter
SVBONY 1.25 " NO.58 Color Filter
SVBONY 1.25 " NO.80A Color Filter
4PCS Sturdy Plastic Case
