by Mike McNamee Published 01/02/2017
The engineering of the system is excellent, solid anodised aluminium for the frame with a nicely sprung, brass sprocket to allow the unit to be dismounted from the adaptor ring attached to the lens.
The filter is a circular polariser (if you look through it at a mirror it is black!). We set it up on a 24–105mm f4 Nikkor zoom lens. Vignetting occurred at 24mm and the effect was made worse stopping down, which sharpened the edge of the intrusion into the field of view.
Depending upon the subject this may be more, or less important, Photoshop could repair many types of 'damage'. The effect was detectable for 7% into the horizontal and 20% down from the top. This is a significant loss of area. The effect was tightened up to 5% and 14% at f16. No vignetting was detectable at the 105mm end of the zoom.
There are 63 days to get ready for The Societies of Photographers Convention and Trade Show at The Novotel London West, Hammersmith ...
which starts on Wednesday 22nd January 2020