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85mm 1.4 L IS preview

Started Oct 31, 2017 | Discussions thread
brightcolours Forum Pro • Posts: 15,885
Re: 85mm 1.4 L IS preview

tim73 wrote:

Steve Balcombe wrote:

1Dx4me wrote:

brightcolours wrote:

1Dx4me wrote:

hmm...nasty CA (heavy purple fringe)

Purple fringing is not CA. The correct term: Longitudinal Chromatic Aberration (LoCA). It comes in two colours at the same time. Magenta in front of the focus plane, green behind the focus plane.

The lens does show a bit of PF, by the way, in the same broom of twigs shot.

for a lens this exciting and anticipated. hold on to your 85 f1.2 lenses, folks

The EF 85mm f1.2 L USM (I/II) also shows LoCA.

i am afraid it is not that simplistic, brightcolours! for rather better understanding, here is link that will help understanding of CA:

https://en.wikipedia.org/wiki/Chromatic_aberration

I fear this is a case of "follow your own advice" - that article clearly explains that purple fringing is not CA!

Huh? Chromatic aberration is any departure from ideal behaviour that is dependent on colour.

PF is not CA.

And magenta LoCA is not PF.

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