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Sony 135 STF on GFX-50R, bokeh visuals

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Earlier, I reported on the great news that the Sony 135 STF (apodized) A-mount lens covers the GFX sensor with zero vignetting. Yesterday I examined sharpness, both on and off axis, using a slanted edge and a Siemens Star for a target, and found the lens quite sharp on axis, and soft in the corners. In the last post, I looked at the out-of-focus point spread functions for the lens, and they looked great.

Now I’m going to let you see what the bokeh looks like in images, both with transition-focus areas, and far out of focus ones. All the images were made with the lens set to T/4.5, and all are  full frame with the GFX 50R. Because of limitations in my hosting arrangements, the files are small. Sorry about that.

This image has a small, quite sharp part. It’s on the right, a little ways below the centerline. It has lots of slightly to moderately out of focus parts. The background is well out of focus, and has that STF look.

 

Sometimes you don’t want your background that far out of focus, but you want it to look very smooth. The STF fills the bill.

 

 

Here’s what a well OOF background looks like.

 

This should give you an idea of how the transitional focus behaves.

An apodized lens has a unique look, and this one performs very well on the GFX cameras.

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Unless otherwise noted, all images copyright Jim Kasson.