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+--- Thread: Interesting .... (/showthread.php?tid=4589)
Interesting .... - Klaus - 12-09-2019
The RF 35mm f/1.8 has quite massive RSAs. And that's (also) a macro lens ...
RE: Interesting .... - you2 - 12-09-2019
Why is this interesting? Isn't it closer to disgusting that such a lens would have massive RSA ?
RE: Interesting .... - Klaus - 12-09-2019
Well, it's interesting because this is the 2nd modern Canon lens that is showing this issue.
It doesn't happen that often after all.
RE: Interesting .... - Rover - 12-09-2019
In a lens as compact (despite the impressive stats) as this, something has to give.
RE: Interesting .... - Brightcolours - 12-09-2019
(12-09-2019, 10:42 AM)Klaus Wrote: Well, it's interesting because this is the 2nd modern Canon lens that is showing this issue.
It doesn't happen that often after all.
Which was/is the 1st one, and how did you detect it? When taking the LoCA test images on manual focus?
RE: Interesting .... - Spinifex - 12-09-2019
Quick question: what does RSA stand for? I'm guessing R-something Spherical Abberation, but I'm stumped.
RE: Interesting .... - Rover - 12-09-2019
R = "Residual" methinks.
RE: Interesting .... - Klaus - 12-09-2019
(12-09-2019, 12:39 PM)Brightcolours Wrote:(12-09-2019, 10:42 AM)Klaus Wrote: Well, it's interesting because this is the 2nd modern Canon lens that is showing this issue.
It doesn't happen that often after all.
Which was/is the 1st one, and how did you detect it? When taking the LoCA test images on manual focus?
The 24-70mm f/4 IS had massive RSAs.
The surprising aspect about the RF 35mm seems to be that AF isn't overly reliable either - but I have to verify that again.
(12-09-2019, 06:29 PM)Rover Wrote: R = "Residual" methinks.
Residual spherical aberrations.