Sincerely disappointed with this as deemed 50mm. Initially it shows that good. We can finally open below 2. But that's where the biggest worries of this objo. Quilting 1.8 is miserable! This gives a clean result and that only 2.8 to nothing to do. Really disappointed on this point. I strongly regret the 1.4 which can be opened at 1.8 and have a good dive and be equipped with a USM. In addition, the plastic finish is very weak and low weight can be a disadvantage. Since it is not stabilized, we tend to tremble so it's light and there it is more forgiving.
In short, I advise you all to be patient !!! Although the price is really attractive, it means everything simultaneously. Pictured is one that may concern is that something for nothing ... Be patient and I swear you will not regret it!