RF100另有f4-f8之间收光圈导致焦点后移的问题，根据https://www.the-digital-picture.com/Reviews/Canon-RF-100mm-F2.8-L-Macro-IS-USM-Lens.aspx 的说法
The-Digital-Picture.com
Canon RF 100mm F2.8 L Macro IS USM Lens Review
Is the Canon RF 100mm F2.8 L Macro IS USM Lens right for you? Learn all you need to know in The-Digital-Picture.com's review!
16英尺厢式货车加一个拖车（负重1200kg）时，如果路况稍微复杂，油耗估计能平均到10mpg。33加仑的油箱，完整一箱油当下正好一百刀。这一路大概要加230刀的油，里程是660mi