Okular Explore Scientific LER 52° 25 mm 1,25“ (AR) Ogniskowa: 25 mm. Pole widzenia: 52° Solidly in the mid-magnification range for most amateur telescopes, the 25mm is a true workhorse for visual observers. If you love deep sky observing, eyepieces in this focal length range not only give healthy increases in magnification, but the contrast enhancement of giving a darker background sky can make all the difference of how galaxies and nebulae appear under suburban skies. The Explore Scientific 52° LER mid-range focal length eyepiece is excellent flat-field multi-element ocular that can transform your visual astronomy experience. With an apparent field of view of 52 degrees, this eyepiece offer incredible value in a very nice eyepiece. These eyepieces are the choice for observers wearing glasses - with excellent performance and durability. The rubber inlet and the foldable eyecups make handling and using in the field easy. The patented EMD-coating produces high contrast images and prevents reflexes and ghosting. The argon purging effectively prevents internal fogging, and you don´t have to deal with dirt, fungus or cleansing fluids getting between the lenses. The eyepieces are sealed - this makes sure you will be able to enjoy these eyepieces for many years to come. Features: Large eye distance, large field and great image sharpness Excellent viewing position for people with glasses Excellent field sharpness even with fast optics 52° apparent field of view Argon-purging prevents internal fogging, the sealing facilitates cleaning Patented EMD-coating to maximize contrast Blackened lens edges to avoid reflexes All eyepieces of this series are parfocal Stainless steel barrel with conical security cutoff The kit includes: 52° eyepiece Dust covers Protective bag Specifications Type: parfocal Optics material: optical glass Optics coating: multicoated EMD (Enhanced Multilayer Deposition) Optical design: 4 elements in 2 groups Apparent field of view, °: 52 Focal length, mm: 25 Eyedistance, mm: 16.4 Field stop diameter, mm: 22.7 Barrel diameter, in: 1.25 Eyepiece barrel diameter, mm: 31.7 Waterproof: yes, sealing ring, additional argon purge Additionally: rubber foldable eyecup, filter thread
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