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討論區主頁 » Four Thirds System and Olympus SLR » SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3

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發表者	討論內容
collective	發表時間: 2007-11-04 06:12
版主註冊日: 2004-10-18 來自: 柏格方塊發表數: 13120	[34564] Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3 引文: lamancha 寫道: 我一直很好奇, 這些大口徑的鏡頭(300/2.8, 400/4, 800/5.6...)的af倒底是怎麼驅動的, 尤其又要做到快而無聲, 以我的300/3.5及200/2.8這兩顆電影鏡而言, 光鏡片就快2kg了, 光是要帶動鏡頭所需的力量就不小了, 這些大口徑的鏡頭的af, 倒底是怎麼驅動的 IF的光學設計讓這些鏡頭在對焦時只需要移動一組相對來說很小的對焦鏡片組.不知這是否是全部的答案?

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主旨:	發表者	日期
SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	ITO	2006-10-21 17:27
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	ITO	2006-10-21 17:28
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	heinz_he	2006-10-22 23:58
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	dustin	2006-10-23 08:22
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	豬腳蟲	2006-10-23 10:11
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	dustin	2006-10-23 10:55
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	yesir	2006-10-23 11:57
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	豬腳蟲	2006-10-26 09:24
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	meowhoo	2006-10-26 14:37
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	ITO	2006-11-03 00:43
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	raytracer	2006-10-25 17:48
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	psyduck	2006-11-11 03:19
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	collective	2006-11-11 06:18
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	1520	2007-01-17 13:37
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	psyduck	2007-01-27 22:57
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	Faust	2007-01-29 13:14
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	cyefen	2007-06-25 22:22
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	daouz	2007-06-26 03:21
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	cyefen	2007-06-26 21:39
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	jjchern	2007-06-27 00:45
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	ITO	2007-06-27 21:06
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	raytracer	2007-06-27 23:02
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	raytracer	2007-11-02 10:42
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	lamancha	2007-11-02 11:17
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	raytracer	2007-11-03 01:08
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	meowhoo	2007-11-03 09:57
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	東方白	2007-11-03 11:00
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	lamancha	2007-11-03 13:19
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	meowhoo	2007-11-03 14:17
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	東方白	2007-11-04 19:44
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	Walt	2007-11-03 15:19
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	collective	2007-11-03 20:56
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	Walt	2007-11-03 21:08
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	collective	2007-11-03 22:02
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	lamancha	2007-11-03 23:07
» Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	collective	2007-11-04 06:12
Re: SIGMA APO APO 50-500mm F4-6.3 EX DG HSM for 4/3	lcat	2007-06-26 08:24

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