佳能镜头STM与USM有什么区别

2024-11-06 20:08:18
推荐回答(3个)
回答1:

这是佳能镜头采用的其中两种对焦马达技术。

前者采用的是STM步进式对焦马达,首次发布出现在650D套头中,属于近代较新的对焦技术,特点是对焦动作柔和平滑,并且无声。不同于其它对焦马达迅猛的突动突停,STM更适用于视频拍摄时的跟焦应用。
STM对焦系统分为导螺杆型与齿轮型。
导螺杆型STM常用于体形稍长的镜头中(比如18-55、15-135STM这类),对焦是无声的;
齿轮型STM常用于体形稍小的镜头(比如50/1.8、40/2.8STM这类),对焦时会有轻微齿轮声,但不影响视频录制。

后者采用的是USM超声波对焦马达,佳能大部分镜头都采用此对焦系统,特点是对焦迅速并且无声。
USM对焦系统分为环形、微型、NANO三种。
环形USM系统常用于体形较大的镜头中(全画幅镜头基本都采用此系统),特点是扭矩大。
微型USM系统常用于体形较小并且成本较低的镜头中,特点是在实现高速和无声的同时还能降低成本,但扭矩不如环形USM。
NANO USM系统是首次应用在C幅机80D套头上的新对焦系统,其综合了STM系统的平滑无声和传统USM系统的迅速特点,在兼顾拍照对焦性能的同时还大幅提升了视频拍摄追焦的实用性。

另外,佳能早期部分镜头采用的是DC对焦系统(比如18-55、18-200IS这类),对焦速度还算迅速,但噪声较大,并且突动突停,不利于视频跟焦拍摄。

回答2:

佳能镜头STM与USM在马达、对焦技术、对焦方式三个方面有所区别。
详细解释:
1、在马达上:
STM是Stepping Motor, 步进马达,本质上是机械马达。
而USM是Ultra Sonic Motor, 超声波马达, 对焦宁静, 快速,。
2、在对焦技术上:
佳能STM镜头是佳能最新使用的一种对焦技术,相比佳能USM镜头来说,STM镜头不仅适合拍摄静态图像,而且还更适合使用镜头拍摄动态视频,在拍摄视频的时候可以完成连续自动对焦。
3、在对焦方式上:
STM镜头使用了电子控制对焦环,在使用手动对焦的时候可以得到更准确顺畅的对焦效果,可以说STM镜头是为了视频而优化的;
而USM镜头是使用的超声波对焦,对焦速度更快,和佳能STM镜头算是平行关系。
扩展资料:
两者区别的详细解释:
1、STM步进马达,是佳能机械马达的缩写,对焦声音比USM声音响一点,特别是我在50mm F1.8上面听到的对焦声音我以为镜头出问题了,在定焦上面声音会更响一些。
成本低廉的STM马达更多的搭载在各种套机头以及小光圈的定焦镜头上面。
2、USM是佳能超声波马达的缩写,有着对焦速度快、对焦声音相对小一些的优势!不过,也称之为土豪马达。
为什么这么讲呢?因为佳能区分的很清楚,只有“L”系列上面最常见USM马达,或者在高价格的镜头上才会搭载USM,充分的显示了一分价钱一分货的道理。

回答3:

简单通俗点说:相对于STM对焦马达、USM对焦马达对焦时噪音更小,对焦速度更快,扭矩更大。超声波马达(USM)还分环形超声波马达(Ring-USM)和微型超声波马达(Micro-USM)。

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