{"product_id":"52-series-4-5mm-waterproof-eyepiece","title":"52° Series 4.5mm Waterproof Eyepiece","description":"\u003c!--start tab--\u003e\n\u003cp\u003eHigh power eyepieces (e.g. 3mm to 10mm) are used not only for obvious observations of planets and double stars, but can be employed for bright, compact deep sky objects. Not only will the scale of an object like a planetary nebula or globular cluster be impressive as it fills the eyepiece FOV, but the background sky will be very dark as the contrast effect increases with added magnification, provided that the atmospheric seeing conditions are favorable enough to reveal a sharp image. The 4.5mm is a popular choice for a wide variety of telescopes, producing some of the highest magnification views that most astronomers will observe at.\u003c\/p\u003e\n\u003cp\u003eExplore Scientific Waterproof Eyepieces - Comfort, Quality, Value. The Explore Scientific 52° Series eyepieces are excellent flat-field multi-element oculars that can transform your visual astronomy experience. With an apparent field of view of 52 degrees, these eyepieces offer incredible value in a very nice eyepiece. Expect exceptional quality and value versus a comparably priced Plossl.\u003c\/p\u003e\n\u003cp\u003eAnother great benefit of these eyepieces is the excellent contrast and ease with which you can gaze, not directly at an object, but slightly to either side. This skill, called using averted vision, is especially helpful when observing faint objects, because using averted vision puts the image on a part of your eye that is more sensitive to light, allowing you to see fainter images.\u003c\/p\u003e\n\u003c!--end tab--\u003e\u003c!--start tab--\u003e\n\u003ch1 id=\"specs\"\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/-FufDZ0aDAQ\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/pW6RMfhU_Co\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003c!--end tab--\u003e\u003c!--start tab--\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eItem Number\u003c\/span\u003e \u003cspan class=\"speccell\"\u003eEPWP5245–01\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eFocal Length\u003c\/span\u003e \u003cspan class=\"speccell\"\u003e4.5mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eLength\u003c\/span\u003e \u003cspan class=\"speccell\"\u003e83.5mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eWidth\u003c\/span\u003e \u003cspan class=\"speccell\"\u003e43mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eWeight\u003c\/span\u003e \u003cspan class=\"speccell\"\u003e181.4 grams; 6.4 oz.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eBarrel Size\/Type\u003c\/span\u003e \u003cspan class=\"speccell\"\u003e1.25\" O.D. \/ Double Taper\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eEye Relief\u003c\/span\u003e \u003cspan class=\"speccell\"\u003e15mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eField Stop Diameter\u003c\/span\u003e \u003cspan class=\"speccell\"\u003e4.1mm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eCoatings\u003c\/span\u003e \u003cspan class=\"speccell\"\u003eEMD (Enhanced Multi-Layer Deposition) on all lens-to-air surfaces\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eLens Elements\/ Groups\u003c\/span\u003e \u003cspan class=\"speccell\"\u003e6 Elements in 3 Groups; Edge Blackened\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eFilter Thread\u003c\/span\u003e \u003cspan class=\"speccell\"\u003eFits Standard 1.25-inch Dia. Thread in Filters (1.125-inches x 42 TPI)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eWaterproof\u003c\/span\u003e \u003cspan class=\"speccell\"\u003eO-Ring Sealed Argon Gas Purged; Tested Under 1 Meter of Water for 30 Minutes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eEyecup\u003c\/span\u003e \u003cspan class=\"speccell\"\u003eRemovable Flip-Down Style Soft Silicone Rubber\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eLens Caps\u003c\/span\u003e \u003cspan class=\"speccell\"\u003eSlide-on Top and Bottom\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eMaterials\u003c\/span\u003e \u003cspan class=\"speccell\"\u003eOptical Glass; Aluminum; Steel; Silicone Rubber\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spanrow\"\u003e\n\u003cspan class=\"speccell speccell-left\"\u003eMarkings\u003c\/span\u003e \u003cspan class=\"speccell\"\u003eLaser Engraved: Focal Length; Series; Serial Number; Brand\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c!--end tab--\u003e\u003c!--start tab--\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":51312147398941,"sku":"EPWP5245-01","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0059\/0158\/2449\/files\/EPWP5245-01_3.jpg?v=1779309360","url":"https:\/\/stemcell.eco\/products\/52-series-4-5mm-waterproof-eyepiece","provider":"Stemcell Science Shop","version":"1.0","type":"link"}