Is there a need for F1.4 lenses....

Started 4 months ago | Discussions thread
DenImage Senior Member • Posts: 3,167
Re: Is there a need for F1.4 lenses....

The third image clearly shows cateye bokeh towards the edge.

If you took the same shot angled so the line of bokeh balls went to the corner instead of the edge, you would no doubt see greater deformation of the bokeh balls from circular to cateye shape.

The first two shots show enlarged bokeh balls which make it difficult to clearly see the deformation.

I would suggest just setting up a scene with one point point of light out of focus, then take a shot with it in the center (as the bench mark circular shape), then take shots in the edge and then the corner. You'll then be able to clearly see the deformation.

Also repeat the shots from wide open to f5.6 to see how stopping down affects the deformation with the 11 circular aperture blades.


 DenImage's gear list:DenImage's gear list
Sony a7R II Sony a7 III Sigma 8mm F3.5 EX DG Circular Fisheye Sony FE 55mm F1.8 Sony FE 100mm F2.8 GM +3 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow