Model: VX39905Simple and intuitive operation by friction stop motion.The MOBILE PORTA has the same function as the PORTA II and you can swing the telescope by hand in the vertical and horizontal directions freely and stop with simple friction.Dovetail-plate AttachmentWith Vixen's renowned dovetail-plate system, different optical tubes can be easily attached. The mount holds optical tubes weighing up to 3.5 kg.Accessory trayThe accessory tray is convenient in putting small pieces such as eyepieces. It is useful when observing at night.Slow motion control handlesThe slow motion control handles of the MOBILE PORTA allow for operating the mount in the whole-circle of the vertical and horizontal movements. It is helpful as used together with the friction stop mechanism when observing at high magnification. The position of the slow motion control handles can be changed if needed.Movable multi-armThe direction of the multi-arm can be rotated in 15 degree intervals so that you can avoid interfering with the slow motion control handle or the optical tube. In addition, the vertical slow motion control handle can be moved outward, in the horizontal direction, to avoid interference with the horizontal slow motion control handle.Foldable mount headThe mount head of the MOBILE PORTA can be folded for convenient storage or transport. The mount head is detachable from the tripod. The tube and Tripod Bag 100, sold separately, is the perfect bag for storage and transport of your MOBILE PORTA. An optical tube cannot be put together in the bag.Specifications:Optical Tube:- Objective lens: D=70mm, Achromatic, multi-coated- Focal length (Focal ratio): F=900mm (f12.9)- Resolving power / Limiting magnitude: 1.66 arc seconds / 11.0- Light gathering power: 100 unaided eye- Size / Weight: 76mm dia 860mm / 2.5kg (Net 1.9kg)- Finder scope: 6x24mm, 5 degrees FoVFocuser:- Focusing mechanism: Rack-and-pinion type- Adapter threads / Visual back: 42mm for T-ring, 317mm push-fit- Eyepieces: NPL20mm (45X, 65' field of view), NPL6.3mm (143X, 22' field of view)Tripod:- Leg type, material: 2-section aluminum legs with quick-release leg clamps- Size: Adjustable from 720mm to 1290mm in length (from 640mm to 1140mm in height),setup radius from 410mm to 700mmOthers:- Accessories: Erect-image prism 31.7, Allen wrenches 4mm and 3mmOthers:- Photography: Usable with Prime focus, Eyepiece projection and Aforcal imaging- Solar observation: Not available- Total weight: 4.9kg (without eyepieces)