Here are several new Olympus 150-400mm f/4.5 PRO lens reviews that have been published on the web. Designed for Micro Four Thirds system cameras the lens announced with a very expensive price tag as $7500 at Adorama and B&HPhoto.

According to Olympus this lens has greatly exceeded expectations and received so many pre-orders. 
…
Continue here:
https://www.dailycameranews.com/2021/01/new-olympus-150-400mm-f-4-5-pro-lens-reviews/