DB2 学习笔记 - AIView.com

I got an used Pentax manual len, M 50mm F1.4 smc at Wukesong. it spent me 650rmb with 7 days guarantee. I take the trial photos for it, it's a great len, has very nice outside of focus(焦外成像).

这个镜头的大光圈解像力稍差，焦外也不是十分理想，在F2.8 及以上则不错，不过最大光圈在光线暗的时候还是提供了非常宝贵的快门速度。 

镜头中有些灰。