Here are the new Sony FE 135mm f/1.8 GM lens reviews and tests published on the web. The Sony FE 135mm f/1.8 GM (B&H Photo Video/Adorama/Amazon) is now in stock and shipping in major stores in US.

The prime lens for full-frame Sony mirrorless cameras that’s designed to deliver the ultimate bokeh. Sony FE 135mm f/1.8 GM is also compatible with APS-C models where it will provide a 202.5mm equivalent focal length.
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https://www.dailycameranews.com/2019/04/sony-fe-135mm-f-1-8-gm-lens-reviews-and-tests/