- It works and gives a good image when used with the 300mm f4 PRO lens (I don't have the 40-150 f2.8 PRO so haven't tried it with that). The camera notes that the converter is attached in the EXIF data.
- Long lens technique becomes very important with the lens attached, so you have to be careful if you want sharp images, even with Sync-IS. My own recommendation is that 1/1000 sec is best for this, but maybe with practice I will get that down. Given that the converter means f8, it is easiest on a bright day, assuming you will want to crop (as is usually the case with small birds). It is not a cheap lens, but is probably what you would expect a teleconverter of this quality to be. It might does reduce the image quality a bit, but I suspect the effects of camera shake are more important which makes it hard to be sure.
Published on: 27 January 2020