If you are looking for a budget eyepiece that complements or replaces the included eyepieces with your telescope, the SWA-58 is definitely worth considering.
The SWA-58 Plossl short-focus eyepieces have been carefully designed to provide high-quality images regardless of the type of telescope they are used with. They have been optimized for the observation of bright objects, thanks to which they obtain a sharp image across the entire field of view. These glasses have a 58-degree field of view, which, combined with their focal length, ensures comfortable observations of the moon, planets and tight pairs of double stars.
SWA-58 are modified Plossl glasses with an additional element increasing the field of view. The eyepiece has a twisted eyepiece that enables cutting off the side light sources that interfere with the observation. The eyepiece has a standard 1.25 "filter thread. Due to the low price and better than average optical capabilities, the eyepieces are perfect for many optical constructions as well as for binocular attachments.
Due to the short focal length, it is recommended to use the SWA-58 4mm eyepiece with telescopes of f / 8 or faster.
| • focal length:|| 4 mm|
| • field of view:|| 58 °|
| • exit pupil distance:|| 16 mm|
| • luminaire diameter:|| 1.25 inch|
| • filter thread:|| 1.25 inch / M28x0.6|
| • eyecup:|| rubber, unwound|
| • anti-reflective layers:|| FMC|
| • construction:|| hybrid, neo-Ploessl, 5 elements in 3 groups|
| • maximum diameter of the eyepiece:|| 44 mm|
| • length:|| 90 mm|
| • weight:|| 180 g|