佳能S90,镜头上写着3.8x IS 6.0-22.5mm 1:2.0-4.9是什么意思？
答案:3 悬赏:10
解决时间 2021-01-27 23:54
- 提问者网友：回忆在搜索
- 2021-01-27 08:29
佳能S90,镜头上写着3.8x IS 6.0-22.5mm 1:2.0-4.9是什么意思？
最佳答案
- 二级知识专家网友：时间的尘埃
- 2021-01-27 09:06
慢慢道来：
3.8x指此镜头为3.8倍的变焦镜头。这样得出：镜头最长焦距22.5/最短焦距6.0=3.75，是不是差不多3.8倍啦？
IS 佳能影像稳定器的缩写，即此镜头具备防抖功能，可以在一定程度上防止由于手的抖动影响照片的清晰度。同样是防抖功能，其他厂商的代码缩写跟佳能不一样，如尼康、松下等，你可以查看对照，增进了解。
6.0-22.5mm此镜头的实际焦距F。因为是变焦镜头，最短焦距6.0mm，最长焦距22.5mm。为什么说是实际焦距呢？因为非全画幅的数码相机，其成像元件CCD或CMOS的面积都小于135胶片的面积，这里就产生了一个非全画幅数码相机特有的一个概念：“相当于135焦距”。你的相机镜头焦距相当于135相机的28mm-105mm。
其中提到的概念：焦距、变焦、画幅等具体的知识描述会很长，你可以自己设法学习。
1：2.0-4.9此是镜头的最大光圈值。2.0指镜头位于最短焦距时具有2.0的光圈值；4.9指镜头处于最长焦距时的光圈值。
光圈2.0时，确实是景深最浅，但不一定是解像度最高。一般一个镜头设计制造完成，会有一个成像最好的光圈值，一般不会位于最大光圈值。这需要你自己慢慢试，不断比较，才能找到。
光圈4.9时的情况...，我这样来描述。光圈大小决定景深范围。所谓景深范围，即被摄景物从最近距离到最远距离的清晰范围，在此范围外的景物就会模糊。光圈越大，该范围越小（短）；光圈越小，该范围越大（长）。
关于光圈值与快门值的关系 此问题如你用相机的手动曝光时需要考虑的事。这里1楼说的简洁明了，请参照。举例：光圈8、快门1/250秒 的曝光参数，与光圈11、快门1/125秒 的曝光量相同。可以从网上输入“倒易律”查看。
愿你从摄影中得到乐趣。
3.8x指此镜头为3.8倍的变焦镜头。这样得出：镜头最长焦距22.5/最短焦距6.0=3.75，是不是差不多3.8倍啦？
IS 佳能影像稳定器的缩写，即此镜头具备防抖功能，可以在一定程度上防止由于手的抖动影响照片的清晰度。同样是防抖功能，其他厂商的代码缩写跟佳能不一样，如尼康、松下等，你可以查看对照，增进了解。
6.0-22.5mm此镜头的实际焦距F。因为是变焦镜头，最短焦距6.0mm，最长焦距22.5mm。为什么说是实际焦距呢？因为非全画幅的数码相机，其成像元件CCD或CMOS的面积都小于135胶片的面积，这里就产生了一个非全画幅数码相机特有的一个概念：“相当于135焦距”。你的相机镜头焦距相当于135相机的28mm-105mm。
其中提到的概念：焦距、变焦、画幅等具体的知识描述会很长，你可以自己设法学习。
1：2.0-4.9此是镜头的最大光圈值。2.0指镜头位于最短焦距时具有2.0的光圈值；4.9指镜头处于最长焦距时的光圈值。
光圈2.0时，确实是景深最浅，但不一定是解像度最高。一般一个镜头设计制造完成，会有一个成像最好的光圈值，一般不会位于最大光圈值。这需要你自己慢慢试，不断比较，才能找到。
光圈4.9时的情况...，我这样来描述。光圈大小决定景深范围。所谓景深范围，即被摄景物从最近距离到最远距离的清晰范围，在此范围外的景物就会模糊。光圈越大，该范围越小（短）；光圈越小，该范围越大（长）。
关于光圈值与快门值的关系 此问题如你用相机的手动曝光时需要考虑的事。这里1楼说的简洁明了，请参照。举例：光圈8、快门1/250秒 的曝光参数，与光圈11、快门1/125秒 的曝光量相同。可以从网上输入“倒易律”查看。
愿你从摄影中得到乐趣。
全部回答
- 1楼网友：duile
- 2021-01-27 10:53
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? ? In fact, there is no more to leave from outside, just look at the performance of the Chinese men's soccer will be able to understand its tragedy lies in the fact that it sought to win more, then more Debu to victory.
? ? doubt, China Men has been purposely pursuing victory. The reason is that demand from the psychological reality of the situation or from the point of view, China needs at least once Xiong Qi Men, rather than as people have been ridiculed as: how can China Men have Duochou, like the group of eunuchs on the brothel. In addition, forced to admit that the Chinese Men in court on a strong performance indeed win ****。 Just think, if not to win, how will those players be eat, drink strong drag prostitute gambling Happy hollowed out body, Organisation nervously into the brutal arena of it? Just think, if not to win, those who after long training course on how to be anxious in the first faint blind, so that blind to their own position? Just think, if not for victory,discount mac cosmetics, were less physical circumstances are not such as persons, those tired of players such as sick cats, how would a monk preaching belly kick crotch hit the \Just think, if not for victory, there is the last word been the case, those people again and again so that plus getting laughs from disgrace, how will they learn the audacity to declare,mac beauty powder, \
? ? Yes, the Chinese Men indeed have been relentless in pursuit of the victory. What, then, why the pursuit of victory in the Chinese men's football but always got the failure?
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? ? spirit win the **** once distorted by quick success, it must be transformed into a kind of defeat the spirit of substantive requirements. Uncontested top dog in the end that may not always win, win, but will only be seeking abortion failed. Therefore, he learned to defeat the spirit of devotion to the demand of Chinese men's football may never be able to escape the fate of seeking abortion were defeated, as China's corrupt officials generally can not escape the fate of evil seek the same good too.
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? ? In the world of Jin Yong's martial arts novel, a strange figure appears isolated situation, but his own name and character is not surprising that the Department, reflected, is one of the most fundamental psychological tendency - - lack of anything, just to pursue what. What, then, why the Chinese Men also follow the uncontested top dog of this fictional character, ever in pursuit of failure? Information, Chinese Men seem to have never had the past two decades major victories, the missing, should not be victory in defeat Yeah. In fact, little of it is not difficult to see the Chinese men's team spirit and Du Gu seeking defeat the spirit of seeking abortion as no surprise, because it reflects that it is the fate of mankind - deliberately seeking victory, not necessarily always prevail.
? ? deliberate pursuit of victory, not necessarily always get the win? At first glance, people will surely think this is a fallacy. However, the fact is the case. For example, the bureaucrats from the eighties has been the resounding to chants of \home to thousands of school children. For example, every year now kill a lot of corrupt officials, which reflects the official is a strong desire to pursue clean politics,mac 120 color eyeshadow palette, but, like Cheng Yaojin corrupt officials has always been to become a leech, after burning ash but to count them into the numerous articles leech. For example, those corrupt officials on the one hand, apart from enjoying a life of extravagance and dissipation of corruption, on the one hand, how can we not want to get an inexhaustible wealth of the world, after mass, shade benefit children and grandchildren? May be the result? Tricks, anti forget his tail, and often also detrimental to our children and grandchildren. Another example ... ...
? ? In fact, there is no more to leave from outside, just look at the performance of the Chinese men's soccer will be able to understand its tragedy lies in the fact that it sought to win more, then more Debu to victory.
? ? doubt, China Men has been purposely pursuing victory. The reason is that demand from the psychological reality of the situation or from the point of view, China needs at least once Xiong Qi Men, rather than as people have been ridiculed as: how can China Men have Duochou, like the group of eunuchs on the brothel. In addition, forced to admit that the Chinese Men in court on a strong performance indeed win ****。 Just think, if not to win, how will those players be eat, drink strong drag prostitute gambling Happy hollowed out body, Organisation nervously into the brutal arena of it? Just think, if not to win, those who after long training course on how to be anxious in the first faint blind, so that blind to their own position? Just think, if not for victory,discount mac cosmetics, were less physical circumstances are not such as persons, those tired of players such as sick cats, how would a monk preaching belly kick crotch hit the \Just think, if not for victory, there is the last word been the case, those people again and again so that plus getting laughs from disgrace, how will they learn the audacity to declare,mac beauty powder, \
? ? Yes, the Chinese Men indeed have been relentless in pursuit of the victory. What, then, why the pursuit of victory in the Chinese men's football but always got the failure?
? ? Chinese Men's problem is, it's just staring at the victory rather than the football itself. As we all know,p90x for sale, football itself is a creation of human beings to cultivate healthy exercises, and set up matches, designed to promote and facilitate the formation of the spirit of this sport and development. Therefore, people who engage in this activity should focus on the sporting spirit of the inheritance and development, rather than focus on this activity brought material benefits, and so-called glory. It is clear, focus on the physical and spiritual tradition and the development of the people, will be doing everything in an attitude of doing nothing, being followed the objective laws of the game itself, would gradually eliminate the activities inherent in human nature in excess of *** *, the full enjoyment of movement brought its own people happy and content,mac eyeliner, will be found everywhere in the joy and satisfaction of these incentives under the gradually improve their physical skills and to overcome the limitations inherent in mankind, and then step by step in order and others can achieve and not yet reached new heights. The focus on this activity and the material benefits brought about by the so-called glory of the people?
? ? spirit win the **** once distorted by quick success, it must be transformed into a kind of defeat the spirit of substantive requirements. Uncontested top dog in the end that may not always win, win, but will only be seeking abortion failed. Therefore, he learned to defeat the spirit of devotion to the demand of Chinese men's football may never be able to escape the fate of seeking abortion were defeated, as China's corrupt officials generally can not escape the fate of evil seek the same good too.
? ? 2008 年 17 August at the Romanian Jiashan
More articles related to topics：
mac lipsticks Go its own way, let others go _2082 taxi
MAC Cosmetics Cheap A cartoon of the Caprice _2860
Wholesale MAC Cosmetics If the next second _1931
- 2楼网友：琴狂剑也妄
- 2021-01-27 10:46
IS是影像稳定器的缩写，就是防抖。肯定没有6的广角，22.5也不是标准的焦段数字，你确信自己没看错吗。2.0-4.9是光圈概念。大小光圈决定景深，但和解像度无关，解像度只和你的CMOS或者CCD有关。光圈大景深下，光圈小景深大。景深理解为，范围内可以看清的东西。同一场景曝光总量固定，光圈大一级，快门快一级
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