摄影好贵，初学者的我已经凑齐了这些。请问这些电子设备多久需要更新一次？高手们帮我看看我还有啥“必须”要买的镜头？

我的用途主要是拍摄孩子和家人（定焦，24中焦），孩子们运动（小白中长焦），出门旅行风景（16-35），室内演出（24-70）。我这些镜头够用了吗？

闪光灯我用SPEELITE 580EXII

1）Canon 70-200

https://www.amazon.com/Canon-70-200mm-2-8L-Telephoto-Cameras/dp/B0033PRWSW/ref=sr_1_1?ie=UTF8&qid=1481736865&sr=8-1&keywords=canon+70+200

2）Canon 24-70 2.8

https://www.amazon.com/Canon-24-70mm-2-8L-Standard-Zoom/dp/B0076BNK30/ref=sr_1_1?ie=UTF8&qid=1481736921&sr=8-1&keywords=canon+24-70

3）Canon 16-35 2.8

https://www.amazon.com/Canon-16-35mm-2-8L-Zoom-Cameras/dp/B000NP46K2/ref=sr_1_2?ie=UTF8&qid=1481736988&sr=8-2&keywords=canon+16-35mm+of+2.8l+iii+usm+lens

4）Canon 50 1.2

https://www.amazon.com/Canon-50mm-Lens-Digital-Cameras/dp/B000I1YIDQ/ref=sr_1_10?s=photo&ie=UTF8&qid=1481737046&sr=1-10&keywords=canon+50mm+1.4

5）flashlight

https://www.amazon.com/Canon-Speedlite-580EX-Digital-Cameras/dp/B000NP3DJW/ref=sr_1_1?s=photo&ie=UTF8&qid=1481737451&sr=1-1&keywords=speedlite+580ex+ii