Nächtliche Beleuchtung im Bad - beleuchtung wc

 2024-07-27 02:15:31

Cross polarizationphotography

With over 19 years of expertise, 2M Solutions is a leading provider of turnkey security solutions for commercial businesses in Dallas-Fort Worth. No matter what your security needs are, we deliver reliable service and seamless integration.

Then I turned the polarizer on the camera so that it was aligned with the polarized light, and turned down the power setting on the strobe to compensate. I processed both images identically in Lightroom.

Cross polarizationantenna

In addition to providing security, we ensure that your commercial business stays safe from environmental risks, such as fires. Each fire alarm system we design is designed to ensure compliance with building and fire code requirements.

Crosspolarizedlightmicroscopy

2M Solutions is a DFW-based provider and professional installer of security cameras, fire alarms, access control systems, and burglar alarms. Whether you just need one type of system or all of the above, we can do the design and installation with seamless integration for comprehensive protection.

Yes, it does work with CPL on the lens. Using a CPL may lead to less colour shifts (may depend on sensor, I checked only a few ones). However I also, like Jim, use linear pol. on both light source (if the light source is a flash, Lee glass linear polarizer does a better job for me than Rosco gels) and lens because it seems to be more effective and easier to profile – the colour target needs to be measured with a pol. filter on the spectrometer, and readily available filters are linear. I never got profiles I like for CPLs if using traditional (non-spectral) profiling methods.

I don’t know the science behind it but even with a nearly perfect color and tone match to a Color Checker for reference paint colors can look different under cross polarized light.

Cross polarizationfilter

One of the downsides of cross-polarization is that it wastes a lot of light. If I had used ISO 100, I’d have needed a 2400 watt-second strobe or would have had to use four pops.

Hi, Simeon. Bought these on Amazon.ca, should be available in Europe as well. $20.50 CDN, includes shipping. I cut one sheet for three Canon 580 EX II’s and one sheet for a Godox AD600. Using mainly for cross polarization lighting of insects. Link to seller: https://www.amazon.ca/Polarization-Polarizer-Educational-Polarized-Non-Adhesive/dp/B0787VMR6D/ref=sr_1_1?ie=UTF8&qid=1533062082&sr=8-1&keywords=90%C2%B0+linear+polarizing+film&dpID=41cgBVGLTfL&preST=_SX342_QL70_&dpSrc=srch

Secure your commercial building even more with our state-of-the-art access control systems that let you manage and track entry.

Cross polarizationphotogrammetry

Back in the day, I would use cross polarization when doing high end fine art copy work. Using a dozen high power Lowell tungsten lights, a better light scan back on a Toyota 4×5, art ( oil painting originals, sometimes VERY large ) tacked up on a wall.

I too use cross polarization for fine art duplication. Capture One’s Lens Cast Correction tool is great for equalizing the exposure across the frame by simply capturing a frame of the white background and using that frame for LCC. The biggest challenge I’ve found is that cross polarizing creates color challenges making it much more difficult to get exact color matches. I don’t know the science behind it but even with a nearly perfect color and tone match to a Color Checker for reference paint colors can look different under cross polarized light.

If you need a professional security camera system for your commercial building, we can design and install any kind of system you need, from traditional analog to cutting-edge IP.

This is an a7III shot, using the CV 65/2 Apo-Lanthar and cross-polarized light. I set up a Godox 600 TL Pro strobe with a 16-inch beauty dish attached, and the grid that came with the dish in place. Before I snapped the grid on, I taped a piece of Rosco neutral polarizing gel to the inside. Then I put a 67-77 mm step up ring on the lens, and a linear (although this technique works with a circular one) polarizer on the ring. I set the strobe for a full 600 watt-second pop. I opened up the lens to f/8, and set the polarizer on the lens to the point where the specular highlights were almost, but not quite, gone. 600 ws not being quite enough, I cranked up the ISO a bit, which was probably unnecessary. I didn’t go all the way to 640 because I didn’t want blown highlights, but it turns out that I could have gone that far easily.

For my subject, I chose a pomegranate branch with some buds. Those of you who know the trees will remember that both the leaves and the buds are shiny as all get out.

I’ve been using cross-polarization in some of my studio work lately, and some have asked me about the benefits of this approach. In order to demonstrate them, I’ve created my first animated GIF.

I’ve noticed that, too. I don’t understand it, either. Is is possible that diffuse specular reflections are dulling the Color Checker patches when they are sampled under unpolarized light? In that case, calibration would have to take place under polarized light.

It would take me several hours to get the lighting perfectly even and flush on the wall ( within a tenth of a stop ). Another hour or two to get the view camera perfectly perpendicular to the wall. I did create a luminescence capture of a bare wall at high bit depth. Inversing this capture, full desaturate, and a levels move with a small amount of noise ( .58* Gaussian monochromatic ) to create a correction mask for “hot spots”.

Crosspolarizedlightgeology

Depending on the sheen, the amount of polarization would very. The exposure was usually 1/10 of a second per line. A full res capture could take 45 min or more.

I took electromagnetics twenty years ago, so I could be missing something, but I also thought this would work with a CPL on the lens, since a CPL (nominally speaking) filters with a linear polarizer and then re-circularizes the wave with a wave plate.

Looking to secure your commercial business in the Dallas-Fort Worth area? Look no further than 2M Solutions! We provide complete turnkey security solutions to ensure that you get maximum protection in minimal time. Each security solution is tailored to meet the unique needs of the commercial business, complete with the necessary equipment and installation. With 2M Solutions, you can focus on running your business with confidence, knowing that your security is in the hands of the best in the industry.

I am using this to shoot paintings. One CPL on the flash YN560IV and one on the lens. It completely removes the reflections from the canvas. I really want to try portraits but it is almost impossible to find bigger sheets of polarized film in Europe at least not at a reasonable price.

*Neat fact: in photoshop, fill a layer with 50% gray. Zoom in to 200-400%, check out the difference between .58 mono gauss noise and .59. Quite a big diff.

I think you can see the benefits of the cross-polarization. The shiny leaves and buds are not sullied by the specular highlights that appear in the image with the polarization aligned.

Contact us today to secure your commercial business! We provide FREE estimates and walk-through appointments so you can ensure that your business gets exactly what it needs within the budget you want. When you partner up with 2M Solutions, you get superior service and expertise that you won’t be able to find anywhere else in DFW:

News