c******2
发帖数: 4019 | | k**L
发帖数: 3630 | 2 是这个吗?
http://shop.usa.canon.com/shop/en/catalog/ef-75-300mm-f-4-56-ii
现在也就是$69.你说呢?
这个二手lens成色很好的也就是50-60的样子.如果无所谓成色,$30-40也找得到.我有这
个,还不错.就是材料比较cheap.都是塑料. | c******2
发帖数: 4019 | 3
是USM的，不过差不多，还能用用吗？
【在 k**L 的大作中提到】
: 是这个吗?
: http://shop.usa.canon.com/shop/en/catalog/ef-75-300mm-f-4-56-ii
: 现在也就是$69.你说呢?
: 这个二手lens成色很好的也就是50-60的样子.如果无所谓成色,$30-40也找得到.我有这
: 个,还不错.就是材料比较cheap.都是塑料.
| D***3
发帖数: 12712 | 4 USM is short for UltraSonic Motor. What this means is that your lens will
autofocus faster than standard models.
there are two different types of USM lenses. A Ring ultrasonic, is the one
you want to purchase. Then there are Micromotor ultrasonic drives that Canon
places into their cheaper lenses. Unfortunately, they also letter these
cheaper versions with USM as well. While these cheaper versions are quieter,
they don't however focus as quickly as a true ring ultrasonic lens.
Therefore, you need to check the lens specifications before purchasing to
ensure it is a ring ultrasonic lens, and not a cheaper version created for
what is rumoured to be marketing reasons. | c******2
发帖数: 4019 | 5
Canon
quieter,
长知识了，谢谢
【在 D***3 的大作中提到】
: USM is short for UltraSonic Motor. What this means is that your lens will
: autofocus faster than standard models.
: there are two different types of USM lenses. A Ring ultrasonic, is the one
: you want to purchase. Then there are Micromotor ultrasonic drives that Canon
: places into their cheaper lenses. Unfortunately, they also letter these
: cheaper versions with USM as well. While these cheaper versions are quieter,
: they don't however focus as quickly as a true ring ultrasonic lens.
: Therefore, you need to check the lens specifications before purchasing to
: ensure it is a ring ultrasonic lens, and not a cheaper version created for
: what is rumoured to be marketing reasons.
| b****t
发帖数: 5743 | | y*b
发帖数: 3190 | 7 这个头不大，转接A7RII吧
【在 b****t 的大作中提到】
: 都没防抖，多个USM意义不大
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