The SWAN 33mm 2 "eyepiece from William Optics is a very attractive wooden Weitwinkelokular. At 72 ° field of view, it offers a vast overview, if you want to look as far-scale deep-sky objects.
The lens surfaces are multi-coated all (FMC-coating) and offer a high transmission. The eyepiece achieves high image quality and an equally good contrast. The reflection-reducing black coating is another advantage.
The eyepiece has no problems with powerful optics and from f / 5 very good use. The rubber eyecups can be folded down and the roughened surface of the eyepiece to provide a secure grip.
It has a very comfortable eye relief of 25mm.
According to the manufacturer, the five of the eyepiece lenses are arranged in four groups.
The Williams eyepieces are parfocal with each other constructs. During an eyepiece does not have refocused.
Weight: 410g
