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The first digital rangefinder camera commercially marketed was the Epson R-D1 (released in 2004), followed by the Leica M8 in 2006. [16] They were some of the first digital lens-interchangeable cameras without a reflex mirror, but they are not considered mirrorless cameras because they did not use an electronic viewfinder for live preview, but, rather, an optical viewfinder. [16]
The Museum of Illusions refers to this type of mirror as an "antigravity mirror" because as it rotates once around the line-of-sight axis, the reflected image rotates twice, appearing upside-down when the joint is horizontal. Another type of non-reversing mirror can be made by making the mirror concave (curved inward like a bowl).
More specifically, rangefinder cameras lack autofocus and employ a very different manual focusing method involving a rangefinder mechanism with an optical viewfinder. Furthermore, most digital rangefinder cameras (except Leica's recent models) lack live preview, which is sometimes considered a defining feature of mirrorless cameras.
Splitting the beam allows its use for multiple purposes simultaneously. The thinness of the mirror practically eliminates beam or image doubling due to a non-coincident weak second reflection from the nominally non-reflecting surface, a problem with mirror-type beam splitters. [1] The name pellicle is a diminutive of pellis, a skin or film.
Live preview on LCD. The concept for cameras with live preview largely derives from electronic TV cameras.Until 1995 most digital cameras did not have live preview, and it was more than ten years after this that the higher end digital single-lens reflex cameras (DSLR) adopted this feature, as it is fundamentally incompatible with the swinging-mirror single-lens reflex mechanism.
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Vivitar Series 1 500mm ƒ/8 mirror T-mount (released in 2009, made by Samyang) Vivitar 500mm ƒ/6.3 T-mount (non-mirror) Vivitar 600mm ƒ/8 T-mount (non-mirror) Vivitar Series 1 600mm ƒ/8 solid cat T-mount (made by Perkin-Elmer) Vivitar Series 1 800mm ƒ/8 mirror T-mount (released in 2009, made by Samyang)
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