11-27-2018, 11:20 AM
(This post was last modified: 11-27-2018, 11:32 AM by Brightcolours.)
Do you have an explanation for the "shutter effect"? Did you shoot with full mechanical shutter?
And the effect is called "cat's-eye", not "cat eyes" ;-)
11-27-2018, 07:23 PM
(This post was last modified: 11-27-2018, 07:25 PM by miro.)
Great vignetting test. How much, 3 stops?
(11-27-2018, 07:23 PM)miro Wrote: Great vignetting test. How much, 3 stops?
Cat’s eyes are caused by mechanical vignetting, which is unavoidable with large aperture lenses consisting of more than 1 element fitted to some sort of barrel
Optical vignetting is caused by the unavoidable light fall-off due to light rays falling in at an angle in the image projection by a lens, the cos^4 rule.
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 1 zoom, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....
11-28-2018, 06:34 AM
(This post was last modified: 11-28-2018, 09:59 AM by Klaus.)
Regarding the weird effect at f/1.2 and 1/4000sec - thinking about it - it may not have been the shutter but a flickering effect from the (LED-)lights.
BTW, multiple "Cat's eye" as shown are surely "cat eyes" ;-)
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