I was able to get my hands on this lens and let me tell you – it’s fantastic! This lens is great for low-light shots and combined with the speedbooster, you get an extra stop of light. With f/1.8, it lives up to its expectations! The additional stop makes it a f/1.2 (or f/2.4 in full frame, 35mm terms). In the pictures below, I’m using it with a Viltrox Speedbooster on a Panasonic Lumix G7. What do you think?