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Mounting is supposed to be done when the camera is turned off, however, for this review, I risked destroying the lens by attaching it with the camera turned on, just for kicks, and nothing bad happened. You can also mount the lens upside down, just like a hood and everything still works fine. Attaching the converter is about the same as putting on a hood: align the orange dots, push and turn clockwise until you hear a click. Unmount by pushing the black tab up and turning until loose.

General: Do not apply this product if the surface temperatures are below 50F. Store in a cool, dry place, protected from freezing or temperatures above 100F. For long-lasting protection of iron surfaces, the cured rust converter coating should be sealed with two coats of high-quality oil-based paint. No other primer is required.

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I'm newer to photography and I am looking to buy a Sony A7III for photo and video and bundle it with the FE 28-70 mm F3.5-5.6 Lens for an extra $200. I would also like a ultra wide option as well so I was looking at the Sony Ultra Wide Lens Converter designed for a FE 28 mm F2 as a cheaper alternative then buying a singular ultra wide lens for $1000 minimum. I was wondering will that converter still work on the 28-70 mm lens?

The Sony NEX camera system has pleased admirers with its high-quality and compact size. But just a few lenses have been released even after a year on the market. One way to make a small selection of lenses go further is to offer secondary lenses that can add flexibility to the primaries, and this is what Sony has done with the VCL-ECU1 Ultra Wide Angle Converter. It attaches to the front of the 16 mm pancake prime, turning it into a 12 mm ultra-wide angle lens without significantly affecting light transmission or sensitivity. I picked up a VCL-ECU1 at B&H Photo in New York last week, and am pleased to report that it greatly enhances my enjoyment of the 16 mm prime lens.

Interestingly, the VCL-ECU1 snaps right onto the front of the big 18 to 55 mm zoom lens as well. But this one is totally incapable of operation with the ultra-wide-angle converter. The results range from a weird pinhole effect at 18 mm to a headache inducing blurriness at 55 mm. So much for that idea!

Advanced Power Design

The Ultra HF frequency converter utilizes state-of-the-art technology including the latest in power semiconductors and transformer technology, all controlled by a ultra-high speed digital signal processing control system to produce an absolutely pure output sine wave.

Reliable Power

The onboard guests do not want to be aggravated by flickering lights, black-outs and generator starts caused by fluctuations in the marina power. Regardless of the dock power supply quality the Ultra HF will always produce stable and reliable power. This reliability is achieved by manufacturing the marine power converter using only the highest quality components and by engineering the converter for actual marine use.

Maximize Marina Power

Many yachts have to reduce their air conditioning and galley loads when in the marina to prevent overloading the circuit breaker on the dock and losing all power. By conditioning and balancing the currents in the shore cord, the Ultra HF converter increases the amount of available power from the marina power system by as much as 35%. The Ultra HF is able to operate into a 100% imbalanced load while maintaining the precise regulation of all the output phases.

Marine Engineered

Designed from the ground up, based on years of marine experience, the converter is packaged in a lightweight aluminum enclosure and is engineered to operate in the worst marine conditions such as high ambient temperature and humidity. It has been extensively tested to ensure that when loads such as large motors and compressors start there are no fluctuations of the output power.

Atlas Marine Systems is the world leader in the design of marine electrical power systems and dockside power converters. We offer a full range of engineering services necessary to define the yacht onboard electrical distribution system or simply the application of the Atlas power conversion products.

The 4KXUSB3 Ultra HD to USB 3.0 professional camera converter with an HDMI loop and VISCA port works with any virtual meeting room software that enables USB cameras and microphones, such as Microsoft Teams, Zoom, Google Meet or BlueJeans.

INOGENI has developed numerous custom applications with our global partners. Capture, mix and switch without drivers. INOGENI makes everything work together thanks to our professional camera converters.

Traditionally, these polarization-conversion devices have been designed using birefringent materials such as liquid crystals and quartz that in essence require relatively large thickness but provide a narrow-band performance. Recently, the design of polarization converters is based more on two-dimensional (2D) structures called metasurfaces. These metasurfaces contain a periodic array of sub-wavelength resonant structures. The phase of an incident terahertz wave can be desirably controlled by those resonators to yield polarization conversion in wideband. Moreover, due to their low profile, usually

In this work, we present a free-standing three-layer transmissive polarization converter that can efficiently rotate a linearly polarized terahertz wave by 90. To enhance the bandwidth, we include two resonators, a split-ring resonator (SRR) and an H-shaped resonator, in the middle layer. Moreover, a low-loss dielectric, cyclic olefin copolymer (COC), is employed as the dielectric support and spacers. Although by far less lossy than most polymers, the COC usage in multi-layer terahertz devices has not widely been embraced since the normal spin-on fabrication technique was not successful. For the first time, we employ an unconventional fabrication technique involving multiple polymer bonding and photolithography steps to realize the three-layer polarization converter with the COC dielectric. The spectral responses of the fabricated device are experimentally validated with terahertz time-domain spectroscopy and the vector network analyzer.

The transmissive polarization converter design proposed here is made up of three metallic layers in a multi-layer structure similar to that proposed by Grady et al.11 and also demonstrated by Chang et al.26 Herein, the cyclic olefin copolymer is employed as the dielectric spacer, and a SRR and an H-shaped resonator are combined in the middle layer. A three-dimensional (3D) view for one unit of the proposed polarization converter is shown in Fig. 1(a), while the corresponding two-dimensional (2D) view of the three different layers labeled A, B, and C is shown in Fig. 1(b). The unit cell is a square of side p = 154 m. The top and bottom layers are made of gold (Au) wire gratings of width n = 8 m and separation m = 6 m, placed orthogonally to each other. The separation between the middle layer and each grating, t, is 74 m. All other dimensions are given in the caption of Fig. 1. To realize a free-standing device, the bottom grating is supported by a 3 m layer of COC. The thickness of all metallic (gold, Au) layers is 200 nm.

Unit cell of the proposed polarization converter. (a) 3D view of the unit cell with all three metallic layers and dielectric spacers. (b) 2D view of the excited front layer, middle resonator layer, and back layer. The dimensions of structural parameters are as follows (all in m): p = 154, m = 6, n = 8, l = 133, w1 = 8, w2 = 14, s = 4, q = 14, g = 6, t = 74, and t0 = 3.

The proposed polarization converter is designed by numerically evaluating the spectral response of plausible middle-layer resonators using 3D finite-element full-wave simulations conducted with the frequency-domain solver in CST Microwave Studio. The main idea is the inclusion of multiple resonators in the middle layer to introduce multiple resonances. In our simulation, Floquet boundary conditions are employed in the x- and y-directions of the unit cell. The frequency-dependent surface impedance that accounts for the Ohmic losses27 of Au is used for all metallic layers. The COC is modeled with a relative permittivity and loss tangent (tan ) of 2.324 and 0.0007, respectively, similar to values reported in the literature.28,29 The simulation results are compared with the experimental results in the Results and discussions section.

Simulated amplitude transmission coefficients of the tri-layer polarization converter based on different middle-layer designs. (a) A comparison between the proposed SRR and H resonator (solid line) and the oriented grating (broken lines) as the middle layer. For the oriented grating, p = 231 m, m = 8 m, n = 12 m, and t = 75 m. (b) Conversion efficiency with only SRR (solid line) and H resonator (broken line) as the middle layer.

Reflection coefficients from the simulation of the equivalent reflective polarization converter. The reflection coefficients are obtained when the converter is excited at normal incidence with a linearly polarized terahertz wave in the x-direction. (Inset) The equivalent reflective converter. ff782bc1db