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<\/picture><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\nAll images are owned by their owners at PentaxForums.com; more info at the end of the article<\/a>.<\/em><\/p>\n\n\n\n The lenses are the following:<\/p>\n\n\n\n Two earlier lenses \u2013 F and FA versions \u2013 share many exterior design traits, just like the weather-resistant D FA versions which are almost identical \u2013 WR and AW versions. The only different lens of the bunch is the rebranded Cosina lens – completely different from the rest by almost all parameters \u2013 it’s the only one with a different look and feel, and the only one with a simplified optical formula and aperture range. Also, it is the only lens with a significantly different optical formula (5-4 vs 9-8\/10-8), but regardless of the changes, it is still a good lens \u2013 albeit with a less premium build quality.<\/p>\n\n\n\n F-series lenses have a distinct look \u2013 two-tone, almost-black and dark-grey outer shell with thin, ribbed, hard plastic manual focus ring, coarse-ribbed aperture ring and red typography. It is not very long, but it has a sizeable diameter and it’s quite heavy, having the feel of a very dense object. 58mm filter thread sits atop the focusing tube, and the lens elements are deeply recessed completely removing the need for a lens hood, as it is already well shielded from stray light. The focusing tube moves forward when focused at closer distances, leading to a shift in the balance.<\/p>\n\n\n\n The focus limiter is a welcome feature. It can limit the lens into three distinct focusing modes \u2013 the whole focusing range, from 0.306m to infinity, the limited range from 0.6m to infinity, or the macro range \u2013 from 0.306m to 0.6m. With the lens in the full range, the camera autofocus algorithm can (and often will) check the macro range, leading to slow autofocus performance and lost photos. Sometimes, it will get lost in the macro range completely. If the lens is used as a general-purpose short telephoto lens, focusing to 0.6m is perfectly acceptable, and in that case, autofocus performance is quick and decisive.<\/p>\n\n\nTechnical data<\/h2>\n\n\n\n
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\u2b25<\/th> F<\/th> FA F2.8<\/th> FA F3.5<\/th> D FA<\/th> D FA WR<\/th> HD D FA ED AW<\/th><\/tr><\/thead> Year of introduction<\/td> 1987<\/td> 1991<\/td> 1998<\/td> 2004<\/td> 2009<\/td> 2022<\/td><\/tr> Optical formula<\/td> 9-8<\/td> 9-8<\/td> 5-4<\/td> 9-8<\/td> 9-8<\/td> 10-8<\/td><\/tr> Aperture range<\/td> \u0192\/2.8 \u2013 \u0192\/32<\/td> \u0192\/2.8 \u2013 \u0192\/32<\/td> \u0192\/3.5 \u2013 \u0192\/22<\/td> \u0192\/2.8 \u2013 \u0192\/32<\/td> \u0192\/2.8 \u2013 \u0192\/32<\/td> \u0192\/2.8 \u2013 \u0192\/32<\/td><\/tr> Aperture blades<\/td> 8<\/td> 8<\/td> 8<\/td> 8<\/td> 8<\/td> 8<\/td><\/tr> MFD<\/td> 0.306 m<\/td> 0.306 m<\/td> 0.43 m<\/td> 0.3 m<\/td> 0.303 m<\/td> 0.303 m<\/td><\/tr> Magnification<\/td> 1\u00d7<\/td> 1\u00d7<\/td> 0.5\u00d7<\/td> 1\u00d7<\/td> 1\u00d7<\/td> 1\u00d7<\/td><\/tr> Filter diameter<\/td> 58 mm<\/td> 58 mm<\/td> 49 mm<\/td> 49 mm<\/td> 49 mm<\/td> 49 mm<\/td><\/tr> Length<\/td> 104 mm<\/td> 104 mm<\/td> 72 mm<\/td> 80.5 mm<\/td> 80.5 mm<\/td> 80.5 mm<\/td><\/tr> Diameter<\/td> 74 mm<\/td> 74 mm<\/td> 68 mm<\/td> 67.5 mm<\/td> 65 mm<\/td> 65 mm<\/td><\/tr> Weight<\/td> 590 g<\/td> 600 g<\/td> 220 g<\/td> 345 g<\/td> 340 g<\/td> 348 g<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n smc Pentax-F 100mm F2.8 Macro<\/h2>\n\n\n\n