SV190 18mm Ultra Flat Field Eyepiece--Observe the moon and deep sky
Main features:
1.offer corrected field curvature
2.Fully multi-coated and blackened lens edges
3.8 lens 5 groups optical lens
4.65° wide field of view
5.20mm eye-relief
6.folded-up eyecup
7.M42x0.75 thread for astrophotography
Package Includes:
1xSV190 1.25" UF18mm Eyepiece
2xLens Covers
1xLens Cleaning Cloth
Flat field eyepieces offer 20-30% larger fields of view than a standard eyepiece.It keeps stars planets and lunar details in focus across the field of view
Flat Field eyepieces offer corrected field curvature, normally one of the flaws in optical imaging. This correction provides excellent Optics from the center of the field, all the way to the edge,not just in the centre.These eyepieces let you observe objects just as they appear in reality
---FMC broadband film maximizes the light transmission and minimizes internal reflection.
---8 elements in 5 groups structure design maximizes contrast and delivers crisp sharp images.
--blackened lens edge to reduce scattering of stray light and maximize contrast.
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20mm eye-reliefIdeal for long intensive observing sessions |
M42x0.75 threadRemoving eyecup has a M42x0.75 thread for astrophotography |
Folded-up eyecupFit for glasses wearers or not |
Size: | 1.25" |
Material: | Metal |
Focal Length: | 18mm |
Eye Relief: | 20mm |
Lens Structure: | 8-Elements 5Groups |
Field of View: | 65 degrees |
Coatings: | Fully Multi-Coated |
Filter Thread: | M28.5x0.6 |
Eyecups Type: | Rubber eyecups |
Thread : | M42x0.75(removing eyecup) |
Net Weight: | 207g/ 7.28oz |