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launched a new generation of super star camera lens - 70sa v4. In this round of upgrade, Tianhu optics has made many improvements in V4 version to further tap the potential of 70sa and give users a better operating experience. Technical features: 1. It has a similar structure and excellent imaging circle of 45mm, which meets the requirements of full frame camera; 2. New design of aluminum alloy mirror body Because of the special optical structure, the whole body of 70sa is a part of the objective lens. In the middle part of 70sa, there is the optical component with the largest light. Compared with previous generations, we have improved the design here. At present, it can not only meet the problem of mirror body sliding under various conditions, but also effectively reduce the impact of over locking hoop on imaging. 3. Newly designed 2.8-inch aluminum focusing seat Two speed toothed focusing, thicker focusing tube, high extinction inner wall treatment, even if connected to the full frame camera, there is no pressure. 4. The newly designed image field rotator is integrated with a new focal plane regulator at the tail V4 version cancels the built-in filter thread interface, and adopts m54 interface, which can be combined with the full frame cryocamera to give full play to the illumination advantage of 70sa product, and is no longer interfered by the previous M48 filter thread. We have m54-m48 adapter ring as standard, so users of SLR camera don't have to worry about using it! In order to eliminate the possible tilt caused by the connection with various kinds of equipment, a new focal plane regulator is also integrated in the tail. Compared with the previous version, it has better rigidity and is not easy to offset. 5. New designed hoop, handle and dovetail plate 1) The V4 version adopts a new designed hoop, and three rows of M6 screw holes are added on both sides to facilitate loading, such as mirror borne computer, star finder / guide mirror, eccentric counterweight, etc. the hoop is locked with a new quick wrench,; 2) The bottom of the hoop is equipped with a special heightening joint when it leaves the factory, and the reserved hole in the middle can pass through the balance bar, so as to adjust the balance of the red weft shaft conveniently; 3) The new patent vixen and Arca composite handle can be used to connect all kinds of accessories conforming to these two standards; 4) It is equipped with CNC new vixen standard dovetail plate as standard; 6. The focusing seat can be connected with the current mainstream electric focusing on the market; 7. The installation hole of electric lens cover has been reserved at the front end of the hood, and the hood can be fully locked by the pre tightening screw to load the electric flat field plate, etc.
Name: sky Rover 70mm f / 5 super astrograph V4 Diameter: 70mm Focal length: 350mm Coke ratio: F / 5 Optics: four pieces and four groups, pan Petzval structure, including many pieces of Japanese super ed and lanthanide materials |Image circle: excellent image circle 45mm Coating: full surface multilayer ultra wideband coating 2.8-inch aluminum alloy two speed toothed focusing seat; effective stroke 29mm; focusing tube end screw: m70x1 thread; standard new image field rotator (CAA), integrated new focal plane adjuster; end interface m48x0.75 external thread; Mirror body: aluminum alloy mirror body, inner wall car system - body blade light barrier, mirror body design - a special hoop The new double hoop is provided with multiple mounting holes on the side, which is convenient for hanging accessories on the side Holding hoop: vixen standard dovetail plate; standard new heightening joint, providing fixing hole of mirror body balance bar Standard patent handle compatible with vxen and Arca dual interface; Size: the shortest length of the whole machine is about 350mm (the baffle is folded and the focusing tube is folded), and the longest is about 350mm 450mm (hood extended, focusing tube fully extended) Weight: About 4kg Package: full package of pearl cotton, double carton transport package