With a 121.9° angle of view, Laowa 6mm T2.1 Zero-D MFT Cine becomes the widest rectilinear lens in the Micro Four Thirds market. Filmmakers are able to capture more details in the shot and make it unrestricted in a tight space. It is suitable to be used on drone, FPV drone, vlogging, extreme wide shots etc.. Zcam E2-M4 , BMPCC 4K , GH5 and other MFT camera would fit this lens perfectly.

Pincushiondistortion

Our extensive optical experience and state of the art metrology equipment allows us to test every lens which we manufacture at Shanghai Optics, and we can provide distortion curves for specific lenses upon request. Although distortion is primarily cosmetic, it remains an important quality of every lens and the level of distortion can greatly change the ease in which information is gleaned from a system or the CPU load required for post processing.

F-theta lenses (used in laser scanning systems) are usually designed to produce a certain amount of distortion (barrel distortion) so that the image height is proportional to the field angle of θ. The ideal image height of an f-theta lens can be calculated using Equation 4

Unlike other types of distortion which are part of the inherent properties of the lens, keystone distortion is caused by improper alignment in a lens array. As light hits each lens and is transmitted onward, rays cross, resulting in parallax and a trapezoidal image. Keystone distortion can often be avoided by careful attention to alignment when creating lens arrays, and may also be corrected in post-processing.

LensdistortionExamples

Lens distortion is a cosmetic-type optical aberration which does not decrease the amount of information in an image. It occurs when information is displaced geometrically, and while it changes the shape of an image will not result in image blur.

The closest focusing distance i.e. 9cm/ 3.54” makes create stronger background bokeh effect. It is also useful when getting a close up on your subjects.

With a 121.9° angle of view, Laowa 6mm T2.1 Zero-D MFT Cine becomes the widest rectilinear lens in the Micro Four Thirds market. Filmmakers are able to capture more details in the shot and make it unrestricted in a tight space. It is suitable to be used on drone, FPV drone, vlogging, extreme wide shots etc.. Zcam E2-M4 , BMPCC 4K , GH5 and other MFT camera would fit this lens perfectly. © Kash © Kash The constant maximum t-stop T2.1 is also favorable and flexible to shoot under low-light conditions. It can render blurred background and creamy bokeh as well.  This lens is named as “Zero-D”. The newly devised optical design contains 13 elements in 3 groups with two aspherical glasses, delivering outstanding image quality with minimal distortion. The close-to-zero distortion (Zero-D) design is extremely useful when shooting architectural, aerial and indoor footage. The closest focusing distance i.e. 9cm/ 3.54” makes create stronger background bokeh effect. It is also useful when getting a close up on your subjects.  58mm filter thread for using with standard screw-in filters. Industry standard 0.8 mod gears on both aperture and focus rings. Stepless aperture ring offers smooth iris control. Both imperial and metric scale printed on the lens body. Laowa 6mm T2.1 Zero-D MFT Cine is a tiny and light lens suitable for everyday filming. The lens weighs around 180g/ 6.35oz and is measured to be ~Φ61 x 53mm/ 2.40 x 2.08”.  It comes with a weather-proof case for hassle-free transportation. ©Richard Wong Laowa 6mm T2.1 Zero-D MFT Cine matches perfectly with Panasonic Lumix GH6. ©Kash Laowa 6mm T2.1 Zero-D MFT Cine with Zcam E2M4. Sample Footage

Optical distortionmeaning

As with other aberrations, F-theta distortion is determined by the optical design of the lens. Shanghai Optics Inc. has over 55 years of experience in design and manufacturing low distortion f-theta lenses. Fig.5 shows the F-Theta

Lensdistortion correctionalgorithm

Optical distortion correctioncalculator

Distortion in a simple lens is a third-order aberration which increases with the cube of the field height. Since distortion affects the image shape, its appearance is very important especially in visual systems. Generally distortion in the order of 2 to 3% is acceptable visually. Figure 2 shows images of a rectilinear object with zero distortion and -3% distortion.

This lens is named as “Zero-D”. The newly devised optical design contains 13 elements in 3 groups with two aspherical glasses, delivering outstanding image quality with minimal distortion. The close-to-zero distortion (Zero-D) design is extremely useful when shooting architectural, aerial and indoor footage.

Barreldistortion correction

As with other aberrations, a lens with a larger field of view will generally exhibit a larger amount of distortion. A fisheye lens or ultra wide-angle lens produces strong visual distortion. Figure 3 shows the distortion in a fisheye lens with effective focal length of 3.0mm. Figure 4 shows a simulated image of a wide angle lens with -50% distortion.

For a multi-element lens assembly distortion will usually be positive or negative, but it may not be linear across the image. One should also be aware that the level of distortion may change as working distance changes and is dependent on wavelength.

Distortion correction can be done post production in a photo editor, since the amount of distortion a lens introduces can be mathematically quantified at any given point. Distortion varies with wavelength, and in situations where a narrow band of light is used it may be computed at the central wavelength.  Digital fine-tune programs are often used to provide lens correction and eliminate unwanted distortion from a final image.

Optical distortion correctionsoftware

The constant maximum t-stop T2.1 is also favorable and flexible to shoot under low-light conditions. It can render blurred background and creamy bokeh as well.

In the F-Theta lens system, the actual image height is designed to satisfy the relation of ?∙?, which is smaller than the ideal image height ?∙???? in a conventional camera lens system. Because the optical system cannot completely correct all the aberrations, f-Theta lens cannot fully meet the linear relationship. F-theta distortion, which describes the relative deviation of the actual image height y from ?∙?, is defined as

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Laowa 6mm T2.1 Zero-D MFT is the widest rectilinear lens you can find in the Micro Four Thirds market. With a 121.9° angle of view and maximum T2.1 t-stop, filmmakers can obtain a unique-to-your-eye perspective even under low-light environment. This lens is also designed as “Zero-D” to deliver excellent image quality. Moreover, its tiny size and 58mm filter thread design make it more convenience and handy to use. It can be used for establishing shots, FPV drone, vlogging and more. MFT cameras like BMPCC4K, GH6, Zcam E2 M4 etc. would fit perfectly.

Venus Optics was formed by a group of passionate industry experts and photographers who wish to create Unique, Practical & Affordable wide-angle and macro lenses.

Alpha Industrial Park, Tu Thon Village, Ly Thuong Kiet Commune, Yen My District, Hung Yen Province Vietnam 17721 +84 221-730-8668 rfqvn@shanghai-optics.com

In some situations, distortion is engineered into a system. There are many reasons why a lens distortion effect may be desirable. In laser applications, f-theta lenses are chosen to introduce a certain amount of distortion into an optical system. In cameras, image creators use an effects library which includes radial distortion, barrel distortion, perspective distortion and pincushion distortion to introduce novelty effects into their images. Wide angle lenses and zoom lenses also create their own signature type of distortion.

Optical distortion correctionformula

Laowa 6mm T2.1 Zero-D MFT Cine is a tiny and light lens suitable for everyday filming. The lens weighs around 180g/ 6.35oz and is measured to be ~Φ61 x 53mm/ 2.40 x 2.08”.

Room 609, 6/F, Global Gateway Tower, No.63 Wing Hong Street, Cheung Sha Wan, Kowloon, Hong Kong +852-54993705 info@shanghai-optics.com

Some lenses that are engineered to exhibit very low levels of distortion may have both positive and negative distortion. This type of distortion is called moustache or wave distortion, and requires special attention to wavelength when calibrating software to remove distortion from the final image.