Today, SIRUI announced it has joined the L-Mount Alliance for future lens development. This is good news for users who invested in L-mount cameras such as Leica, Sigma, and Panasonic.
The first Sirui autofocus lens with the L-mount will be the full-frame Aurora 85mm f1.4, followed by other Sirui AF lenses later this year. This will provide owners of L-mount cameras like the Panasonic LUMIX S5X II and S1R II, DJI Ronin 4D, Blackmagic PXYIS, and Pocket Cinema Camera 6K with exciting new lens options.
The new Aurora 85mm f1.4 L-mount lens will be displayed at the Sirui booth N2829 at the NAB show in Las Vegas.
The L-Mount Alliance stands for openness, innovation, and the highest quality in photography. By welcoming SIRUI as a new member, we are not only expanding our network with another strong partner but also reinforcing our commitment to diversity and fresh impulses within the ecosystem. SIRUI brings new perspectives and expertise to the Alliance, enriching the L-Mount system with forward-thinking approaches. Together, we aim to provide photographers and filmmakers with an even more comprehensive and flexible system that meets the highest standards.
Valentino Di Leonardo, Managing Expert Technology & Licensing at Leica Camera AG
SIRUI is a globally recognized brand in optical imaging, offering a diverse product lineup that includes optical lenses and photography and videography equipment. Our company operates with its headquarters in China and has subsidiaries in the United States, Germany, and Japan. With its in-house optical R&D and manufacturing facilities, SIRUI has established a fully integrated system encompassing research, production, and sales, with a distribution network spanning over 60 countries and regions worldwide. By leveraging its proprietary brand, independent technological innovations, vertically integrated supply chain, and cost advantages, SIRUI is set to significantly enhance the L-Mount Alliance lens ecosystem. Our aims to introduce a broader range of outstanding, high-value L-mount lenses to the market.
Li Jie, Founder and CEO at SIRUI Optical
The L-Mount Standard
To ensure maximum product diversity, a diameter of 51.6 millimeters was chosen to make the L-Mount suitable for use with full-frame cameras and on cameras with APSC sensors. The short register of only 20 millimeters enables a short distance between the lens and the sensor, allowing for a considerably more compact construction – which is particularly helpful for developments in the wide-angle lens segment.
To ensure resistance to even the most extreme conditions and guarantee maximum reliability for many years of intensive use, the camera bayonets are manufactured from wear-resistant stainless steel, with four flange segments that prevent canting and ensure a secure and precisely positioned lens attachment. The standardized L-Mount contact strip facilitates trouble-free communication between the electronic components of the lens and the camera – including the possibility of installing future firmware updates for lenses to react to technological advances and exploit the full performance potential of the lenses.
It will be interesting to see who else joins the club, as L-mount lenses are not as widespread as other versions. The Canon RF Mount also experienced limitations, but they have opened the mount up to several manufacturers. A camera needs to have lens options, or the ecosystem will feel closed.
