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+--- Thread: Focus by wire, a catastrophe low light landscape (/showthread.php?tid=383)
Focus by wire, a catastrophe low light landscape - Klaus - 02-28-2017
The thing is - the (manual) focus confirmation dot has a very wide "in focus" range. I wouldn't call it exactly accurate near the "edges" of that range. This may be Okay for slow speed, wide angle lenses but that's about it - in my opinion.
Focus by wire, a catastrophe low light landscape - JJ_SO - 02-28-2017
Not sure, if faster lenses could get better focus accuracy because of shallower DoF. I think it depends on the lens' overall performance. The more CA wide open, the worse the accuracy?
Focus by wire, a catastrophe low light landscape - Brightcolours - 02-28-2017
I have some different experiences with it.
![[Image: gallery_10230_17_57825.jpg]](https://forum.photozone.de/uploads/gallery/album_17/gallery_10230_17_57825.jpg)
![[Image: gallery_10230_17_156398.jpg]](https://forum.photozone.de/uploads/gallery/album_17/gallery_10230_17_156398.jpg)
Just two examples, using focus trap (which works on focus confirmation).Ultra Micro Nikkor 55mm f2.
I have quite a few other lenses which are pretty good with focus confirmation too, including a 55mm f1.2.