The Leica Summicron-M 50 mm f/2.0 is still my all time favourite. It is a focal length built with the angle of viewing close to what you see with your eyes. The 28mm is slightly too wide in many situations and the focal length above 75 mm, the medium or tele, is too far from the subject. When I travel, the Elmarit-M 28mm f/2.8 is the widest lens so far when used to capture landscapes and streets. I have also used it for taking some indoor architecture such as in a terrace house. The Summicron-M 50 mm f/2.0 is my daily companion, carried in my messenger bag all the time, ready to shoot. The Leica Summarit-M 90mm f/2.5 is used for taking portraits and so far it handles really well in all my jobs. It renders very high resolution and excellent colour balance.
One thing I have to keep in mind all the time: the Leica M system is not ideal for taking close-ups. The closest distance for the Elmarit-M and Summicron-M is 0.7 mm and the Summarit-M is 1mm. But overall this is a decent closest distance. Everything has its limitation.
The featured image taken for this post was shot in a park. I was not sure if this area is a habitat for the rabbits but it was just amazing to see these two little lovely creatures. I took three shots from a distance for fear of losing the sight of them (the one at the background was running away). It was hard to focus the one in the foreground in the shade and I was not confident. I aimed at the ears of the rabbits. However, in the first two takes, the rabbit was not in focus, a bit blurry. The third one was better captured. Since the contrast between the light and the shade is so great, I have done some post processing on the original RAW in Adobe Lightroom enhancing the image: cropped the image, reduced the highlight and increased the brightness of the shadow area. I am still not very satisfied with the overall result.
Anyway, I have to put aside doing this lens review for the time being. The last thing I want to show you is a video below showing how to mount the lens hood (not included in the box, sold separately) on the Summarit-M 90mm f/2.5. Enjoy.