Fitz Michael
From: Florida

R3_100-400GM

August 03, 2018
I had this lens for couple months now and I've noticed the lens sometimes it won't focus. I have to turn off the camera and it the lens works again. I updated the software to the latest one available to download and that did not fix the problem. also, the manual focus to infinity is not calibrated correctly.... Read More  Hide
Mirek S
From: Prague

Not for video, otherwise great lens

December 30, 2019
This is fantastic lens for photography with practically no compromises but if you look for wild life video lens, this one is not for you. image stabilizer is not optimized for video and achieving smooth footage even from tripod is impossible.
Kent_B
From: California

Pronounced Vignette

December 05, 2020
In low light conditions this lens has a pronounced vignette at 200mm and beyond. When paired with a teleconverter the vignetting is especially strong.
Cross54
From: Columbus, OH

Great Lens while it lasted

September 13, 2021
I purchased this lens in March 2021. It performed great the first few times when I used it to take a few shots of the moon (see photo), and a few other shots. I took it on a recent vacation and when I went to use it, I could not get it to focus either in Manual or Automatic mode. The sharpness is no longer there even though I babied this lens, no drops or rough handling. I have no clue as to why, but now I have to go through the hassle of sending it in for repair etc.... Read More  Hide
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