Why are Leica Lenses so Small?

Leica lenses are small as they don’t have much in the lens other than the optics and the manual focusing mount. Another reason they are small is to minimize the viewfinder blockage. Due to the rangefinder design, the lens does not need to be manufactured with room for a mirror, like an SLR or DSLR, thus allowing a less complicated optical design.

Do you need a big lens to take good photos? How good are Leica’s photographs? What are lens size and sensor size? These are some of the questions which I have answered in this article.

Do you need a big lens to take good photos?

The lens diameter is one of the factors that affect image quality. A larger lens has more area to collect light, which means that the image will have twice the brightness of a smaller lens. With more light ending up on the sensor, you can have the same image quality with shorter exposure.

Photos taken with a bigger lens have a higher resolution, and the ability to see fine detail. Also, as the bigger lenses capture more light, the shutter speed is shorter, resulting in less motion blur when holding the camera.

However, with good photography skills, you can take good photos with a big lens as well as a small lens. As good photos do not depend on the camera, but rather on your skill.

Leica 35mm f/2.0 SUMMICRON-M Aspherical Lens, Silver

How good are Leica’s photographs?

Leica photographs have superb image quality which gives the photographer a unique shooting experience. Their super sharp lenses, their compact design and their simple functionality ensure that the photographs capture the tiniest detail in the entire screen rather than what’s only in their frame.

Leica photographs are high-resolution photos that are sharp and with better noise performance. Leica photographs are different from other photographs due to a combination of factors. In the Leica images, the popping colours and the out-of-focus areas at wide apertures are easy to pinpoint. These images are pleasant to the eye as they bring life to the photos.

Lens size vs Sensor size

Lens size

Lens size in the camera is the focal length, which tells us the angle of view. It tells you how much of the scene will be captured and how large individual elements will be. The longer the focal length, the narrower the angle of view and the higher the magnification.

Sensor size

Sensor size describes the dimensions of a sensor. It can be measured either in “mm” or “inches”. A large sensor size means more light is captured by the camera, which ensures a better image and a potentially higher resolution.

The image quality and flexibility of what kinds of images you want to capture are directly related to your camera’s sensor. The sensor size affects image quality, resolution, depth of field, angle of view and low light performance.


You can take good photographs with a smaller lens of Leica camera or a bigger lens – they both have their merits. It depends on the type of photographs you want to take. Yet, the lens size and the sensor size carry importance when you want to buy or rent a camera.

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