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| =="fast" classification== | | =="fast" classification== |
| {|cellspacing=0 border=1 | | {|cellspacing=0 border=1 |
− | ! format !! benchmark !! quite fast lens !! common fast lens !! notes about the "very fast" definition given above | + | ! format !! benchmark !! quite fast lens !! common fast lens |
| + | || notes about the "'''very fast'''" definition given above and about the benchmark |
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− | || large || f2.5 || f3.5 || f6.3 || f2.5 equals the benchmark set by the [[Kodak Lenses|Kodak Aero]] in 1940 | + | || large || f2.5 || f3.5 || f6.3 || '''f2.5''' equals the benchmark set by the [[Kodak Lenses|Kodak Aero]] in 1940 |
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− | || medium || f1.8 || f2.8 || f3.5 || f2.0 pushed the available light photography with the [[Ernostar]] in 1924 | + | || medium || f1.8 || f2.8 || f3.5 || '''f2.0''' pushed the available light photography with the [[Ernostar]] in 1924.<br/>The 2nd version of the Ernostar also set the benchmark already in 1925. |
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− | || 35mm || f0.95 || f1.4 || f1.7 || f1.6, because faster than f1.7, a lens speed which is almost average for the [[SLR]] normal lenses since the 1960s which were also the kit lenses. Fast lenses for [[leaf shutter]] SLRs reach only f1.9 max. lens speed. | + | || 35mm || f0.95 || f1.4 || f1.7 || '''f1.6''', because faster than f1.7.<br/>f1.7 is a lens speed which is almost average for the [[SLR]] normal lenses since the 1960s which were also the kit lenses. Fast lenses for [[leaf shutter]] SLRs reach only f1.9 max. lens speed. The benchmark is defined by the so-called [[Canon]] "Dream Lens" for [[rangefinder camera]]s. Actually it's been surpassed by a few faster lenses. |
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− | || APS-C || f0.95 || f1.8 || f2.8 || f1.4 because smaller format than 35mm requires faster lenses for achieving almost similar [[depth of field]] | + | || APS-C || f0.95 || f1.8 || f2.8 || '''f1.4''' because smaller format than 35mm requires faster lenses for achieving almost similar [[depth of field]] |
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− | || [[Micro Four Thirds]] || f0.95 || f1.8 || f2.8 || | + | || [[Micro Four Thirds|µ4/3]] || f0.95 || f1.8 || f2.8 || µ4/3 camera makers [[Olympus]] and [[Panasonic]] deliver some fast lenses, 3rd-party lens makers the same lenses as for APS-C. The result is a similar available lens speed palette for both sensor sizes, APS-C and µ4/3. |
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− | || cine lens ([[C-mount]]) || f0.95 || f1.4 || f1.7 || | + | || cine lens (many with [[C-mount]]) || f0.95 || f1.4 || f1.7 || The benchmark is slower than the fastest ever cine lens which was for [[35mm]] half-frame format, the legendary [[bokeh]] giant [[Zeiss]] [[Planar]] 1:0.7 f=50mm. The lens was used by Stanley Kubrick for his film ''Barry Lyndon'' which received 4 Oscars, one for the camera, and by the ''NASA'' for moon flight shots! Many [[C-mount]] cine lenses were constructed for 16mm cine film or sensors up to 1" size. Some are sufficient for and adaptable to µ4/3 cameras, a few even sufficient for [[APS-C]] sensors. But surprisingly the pallet of available lens speeds is more alike that of lenses for [[35mm]] frame format 24x36mm. |
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