我有关于DR镜头在M6上近距不能工作的报告，但我不能确定这些报告是因为机身、镜头不同还是错误使用的原因。

I have reports of the DR not functioning in close up range on a M6. I am frankly unsure if these reports are due to variations with the bodies and the DR, or are the result of user error.

youdao

具端著丝粒的镜头(注：我猜是类似于针孔镜头吧)具有宽阔之景深，以具端著丝粒的镜头，你能够将由镜头不同距离之目标物成像和保持目标物在焦。

Telocentric lenses work with a wide depth of field. with a telocentric lens, you can image objects of different distances from the lens and the objects stay in focus.

youdao

这些设备通常都使用透镜镜头，将不同的图像向两个固定的方向投影。

These devices usually use lenticular lenses to project different images in two fixed directions.

youdao