Tech: The Sigma 18-35mm = Ultimate Champion?

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Last week announcements surfaced of a new Sigma lens. If you have followed this site for a while you’ll know that I am a big lover of Sigma lenses. In the recommendation video below all lenses I suggest for a filmmaker with a moderate budget are Sigma lenses as they are well built and give superb image quality for their price.

Sigma is now introducing the 18-35mm with a constant aperture of 1.8. With budget zoom lenses you may be accustom to an aperture that shifts with the focal length, such as f/4.0-5.6. This lens will maintain the f/1.8 throughout the 18-35mm zoom which is a major selling point, as mentioned in the video having a fast lens is a must, and in the long run it will save you a lot of time and money.

The lens will likely drop around the $1000 mark when released, give or take, and although that isn’t cheap when compared to a budget zoom lens such as the Nikon 18-35mm f/3.5-4.5, it is a very good price when compared to the L series lens group, and as I stated, Sigma’s are fantastically built.






 “To develop a large aperture zoom lens with a maximum aperture of F1.8, it was necessary to solve a variety of technical challenges. As the f-number decreases, so does the depth of focus, making it extremely difficult to 
minimize spherical aberration, axial chromatic aberration, astigmatism and field curvature. To minimize astigmatism across the zoom range, Sigma leveraged its extensive experience in reducing optical aberrations and designing advanced structural elements. Sigma gained this know-how when it developed such super wide angle zoom lenses as the SIGMA12-24mm F4.5-5.6 II DG HSM and SIGMA 8-16mm F4.5-5.6 DC HSM. Ongoing technological innovation at Sigma’s Aizu Factory has also contributed to further enhancements in lens production. Advanced production technologies have made possible a large-diameter molded glass aspheric lens, which teams up with SLD (Special Low Dispersion) glass elements to optimize power distribution and minimize axial chromatic and spherical aberration and field curvature. Thanks to its hard-earned knowledge of lens design and advanced lens manufacturing techniques, Sigma has succeeded in creating a lens that offers F1.8 throughout the zoom range, as well as exceptional image quality at wide open aperture.”

The lens is designed for an APS-C sensor which rules out the use of using this lens on a full frame camera such as the 5D Mk II. However with the constant production and improvement of APS-C cameras like the 650D and with more budget cinema cameras flocking the market like the Black Magic 2k & 4k Cinema Camera  that have smaller sensors than the full frame DSLR’s the lens will surely be popular.


About The Author

Lewis McGregor is an aspiring filmmaker, photographer and online content creator from Wales.

  • LeonThe3rd

    very insightful. came across some of your tutorials on youtube. keep it goin man – LeonThe3rd