}, { The distance from the center of a curved mirror or lens at which parallel light rays converge to a single point. defaultImage: '', defaultImage: '', }, { }, { It is made of opaque black stretch nylon that fits like a glove and fastens with elastic on both ends. }, { The primary mirror is held in place by an open-ventilation mirror cell which also helps the mirror to acclimate quickly. Orion SkyQuest XX16g GoTo Truss Tube Dobsonian Telescope. Refractors use a series of lenses to provide a clear image. This warranty is for the benefit of the original retail purchaser only. width: 90, Now an employee-owned company, we pride ourselves on an unswerving commitment to best quality products, value and unmatched customer care. Included are the 26mm, 32mm and 38mm eyepieces, all of which have a 70anddeg; apparent field and are multi-coated. Referring to the manual is recommended. It is not intended to remove or restrict your other legal rights under applicable local consumer law; your state or national statutory consumer rights governing the sale of consumer goods remain fully applicable. Because we sell direct, we can offer you tremendous value at a great price. Dust covers (x2) }, { The astro-photographic capability of the telescope is based on the style, stability, and accuracy of the mount and tripod. This is important to keep in mind when observing astronomical objects which require high resolution for best viewing, such as planets and double stars. sourceURL:'/catalog/community_content_viewer_placeholder.jsp?productId=99825&isPDP=true', width: 160, 16" parabolic primary mirror and support cell }, You can view this product by clicking on the product image or the button below. }, { Typically in-stock items will ship first and backordered items will follow as soon as they are available. layers: 'Artimg-ObservDoubleStars' 4 Truss pole pair assemblies Assembled … Cassegrain telescopes routinely use spheres in addition to other lenses in the optical path to correct for residual spherical aberration. Not sure how to choose a telescope? defaultImage: '', layers: 'Artimg-Choose_Scope_Astronomy_square' These scopes provide the best performance but may require more skill to master and appreciate. height: 160, The Orion SkyQuest XX12g GoTo Truss Tube Dobsonian Telescope was designed for portability above all else. }, {"clickFunction":"function() {$(\'#_widget61826785092\').widgetClass().scrollNext(\'#_widget61826785092\');}","widgetClass":"ButtonWidget"}, {"snapClosest":true,"bindings":{"bind0":{"fn":"function(event, pageNum) { PagedDataSetFilmstripLoaderWidget.loadPage(\'#relatedItems\', Math.floor(pageNum)); }","type":"scrollend","element":"#_widget61826785092_trigger"}},"unitSize":230,"widgetClass":"SnapToScrollerWidget","scrollSpeed":500,"scrollAmount":1150,"afterScroll":"","animateScroll":"true","beforeScroll":"","direction":"vertical"}, {"emptyItemViewer":"
","imageThreshold":5,"pages":10,"dataModel":{"imageWidth":90,"cacheEntitiesInRequest":false,"entityId":"102659","entityTypeId":"4","dataProviderWidget":"com.fry.ocpsdk.widget.catalog.dataproviders.RelatedItemsDataProviderWidget","imageHeight":90,"itemViewerWidget":"com.fry.starter.widget.viewers.ItemViewerWidget","direction":"vertical"},"pageSize":"4","widgetClass":"PagedDataSetFilmstripLoaderWidget","loadThreshold":1,"direction":"vertical"}, "The XX16g's innovative design features enhance the appeal of owning a large Dobsonian and we expect to see several at this year's UK star parties" Heavy-duty clutches on both axes allow independent adjustment of motion to desired level of resistance. Includes Ultra Brush Dust Remover, Dust Pro Compressed Air, Cleaning Fluid, 2 Booklets of Premium-Grade Lens Tissue, and Ten Cotton Swabs. The focal ratio of an optical system is the ratio of a telescope's focal length to its aperture. }, { When a truss tube telescope (equipped with a solar filter but no Light Shroud) is pointing near (not at) the Sun, direct sunlight can hit the mirror and focus on the solar filter or other portions of the telescope. layers: '' Please sign in to message advertiser. Reflector mirrors are made from glass with different levels of thermal expansion. EZ Finder II reflex sight This is important to keep in mind when observing astronomical objects which require high resolution for best viewing, such as planets and double stars. }, { height: 90, DeepView 28 mm eyepiece, 2" entityId: 102078, Heavy-duty clutches on both axes allow independent adjustment of motion to desired level of resistance, Huge 16" (406mm) diameter, convex-back parabolic primary mirror with enhanced, 94% reflectivity aluminum coating delivers outstanding views of faint deep-sky objects.