Irix 150mm f/2.8 MACRO 1:1 is a modern and versatile macro telephoto lens designed for full-frame high-resolution DSLR cameras.
Its fast aperture of f/2.8 facilitates shorter exposure times, while its moderately long focal length of 150mm provides an excellent compromise between the narrow viewing angle desired in macro, advertising and portrait photography, and the convenience of hand-held photography.
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https://www.dailycameranews.com/2018/11/irix-150mm-f-2-8-macro-11-lens-additional-coverage/
