I have an Olympus E-M10 with an Olympus 75 – 300 mm f4.8-6.7 II lens that I am trying. Since the camera has a micro 4/3 sensor it gives me an effective focal range of 150 – 600 mm. My reason for trying it is to see if it will give me the ability to photograph wildlife and up-close landscape details.
This morning I took it with me while I walked down to the main buildings. The first image is just to remind folks that we still have piles of snow even though it has melted from most surfaces. The second two images were taken at the 300 mm focal length so that I could get an idea of how the camera focuses as well as the quality of the images. So far I have found no problems and I am satisfied with it for making these types of images; but, I could always use even longer focal lengths. I crop-zoomed the last two images to get even longer focal length. It is light enough and small enough with sufficient image quality for me to carry as a walk-about camera and lens to make pictures of opportunity; but, I have more testing to do before I decide whether to keep it.