回复：这三个sigma/nikon长焦镜头哪个好些？

Out of these 3, only the 50-500mm is an EX, which is Sigma's gold ring lens.  Believe me, you do not want any Sigma lens that is not EX. 

With good light, 50-500mm is pretty good. 

If you buy 1 TC-20 E III for $700, you could sell it for at least $600 when you get back. 

If you get a Bigma, you could lose a lot more than $100. 

Your money, your call. 

所有跟帖： 

• Oh my goodness... What a waste would be. -老糊涂蛋- ♂ (207 bytes) () 07/07/2011 postreply 15:10:22

• 三个都不行？ -tang07059- ♂ (84 bytes) () 07/07/2011 postreply 15:38:09

• 不记得说过TCIII。 -老糊涂蛋- ♂ (79 bytes) () 07/07/2011 postreply 20:23:39

• 回复：不记得说过TCIII。 -tang07059- ♂ (5718 bytes) () 07/08/2011 postreply 08:16:43

• 你讲清楚你买这玻璃的目的，我告诉你我的体会。如何？ -老糊涂蛋- ♂ (0 bytes) () 07/08/2011 postreply 17:28:07

• TC-20 E III＋７０－２００　IQ 好过50-500mm ？ -tang07059- ♂ (43 bytes) () 07/07/2011 postreply 15:41:58

• IQ先不论，单就对焦速度来说，TC就大大打折扣了。 -Able- ♂ (0 bytes) () 07/07/2011 postreply 18:47:12