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The Musou Black KIWAMI is on backorder due to its popularity, but it sells for about $62 (¥8,000) plus shipping for a 0.9x1m swath through KoPro’s website.

Black holes. They’re an astronomical phenomenon that sucks in all available light with no escape. So what if you could create a photo backdrop that could mimic that kind of light absorption without reflecting? A photographer recently used an ultra-black fabric to make the darkest photo backdrop in the world. In the 5-minute video above, French photographer Mathieu Stern shares his recent experiments with Musou Black KIWAMI fabric by KoPro, which is able to absorb over 99.905% of available light. This means it literally no perceptible reflection at all, even in bright ambient sunlight.

Because of the unpredictable delivery reliability of CS-mount lenses, we do not carry this standard in our online store. However, we do provide them for volume projects starting from 100 pieces per year. Typically, the prices for these lenses range between 8 and 25 euros per unit. Moreover, we offer customization options for the iris. If you're interested in acquiring these lenses, please inform us.

C-Mount adapter

“This new material is mind-blowing,” concludes Stern, “and changes the way we can light a subject for video or a photo shoot.”

The shorter FFD of the CS-mount allows for more compact camera designs, as the lens can be positioned closer to the sensor.

You can attach a C-mount lens to a CS-mount camera by using a 5mm adapter ring. This ring fills the gap caused by the shorter flange distance in CS-mount cameras, ensuring proper focusing of the C-mount lens.

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C and cs mountcanon

The normal visible light black fabric will reflect red light to an IR camera, creating a red background. But since the IR Flock Sheet absorbs nearly all of the red light in the IR spectrum, it remains as black as the human eye can see, even in IR.

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When choosing between C-mount and CS-mount for a machine vision application, the key considerations are the available space, the required lens characteristics, and the desired cost-effectiveness. C-mount offers a wider selection of lenses and is more versatile, while CS-mount is better suited for compact designs and cost-sensitive applications.

Secure Mounting: Strong and stable attachment between the lens and camera is ensured by the screw-threaded connection, ideal for applications requiring stability.

Because of this difference, you can't directly attach C-mount lenses to a CS-mount camera. However, you can use C-mount lenses on a CS-mount camera by using a 5mm adapter ring. The shorter FFD of CS-mount lenses makes them incompatible with C-mount cameras.

Stern was able to take images of plants with the IR camera, and isolate them with the black backdrop and the results are stunning, with no Photoshop trickery needed. But Stern said while the IR Flock Sheet is impressive, the Muso Black Available Light Black Fabric is simply amazing.

c-mount thread dimensions

C-mount and CS-mount are two common lens mounts used in machine vision. They're similar in many ways, but there are important differences to consider when choosing the right one for your machine vision setup.

KoPro also has black paint that is 94%-98% light absorption, so this cloth represents KoPro’s efforts to eliminate light reflection completely.

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CS-mount diameter

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Stern tested two different versions of the backdrop cloth, one with a full spectrum infrared camera, and one with a regular camera capable of capturing available light. Both the IR Flock Sheet and the Available Light Backdrop were able to resist even bright, ambient sunlight, and maintain a completely black background, even in the IR spectrum.

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CS-Mount lens

Unfortunately, directly mounting a CS-mount lens onto a C-mount camera is not feasible. The shorter design of the CS-mount lens prevents it from reaching the correct focal point due to the additional space in a C-mount camera.

Pushing it even further, Stern set his lens at f/0.95, and running up the ISO in steady increments, Stern found that it wasn’t until his camera reached an ISO of 51200 before the Musou Black backdrop started to show some light fade, though it could be argued that’s from the surrounding light coming into the camera and not any reflection.

Need more info or have some questions about C-mount of CS-mount lenses? Fill out the form below and our team will be happy to assist you.

Cto CS-Mount adapter

Durability: Designed for industrial environments, C-mount lenses can withstand tough conditions like vibrations and temperature extremes.

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C-mount camera

In terms of compatibility, the C-mount standard is more widely used, offering a broader selection of lenses from various makers. C-mount lenses are versatile, working with both C-mount and CS-mount cameras.

However, CS-mount lenses are often cheaper as they use fewer glass elements. Both types support a maximum sensor size of 1.1", so they're not suitable for larger sensors found in high resolution cameras, which may require a different lens mount, such as the F-mount.

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Versatility: C-mount lenses work with a wide range of image sensors, making them compatible with various machine vision cameras.

Even when shooting a picture using a flash, the black background reflects no visible light, not even the hotspot that usually appears on a flash illuminated image.

C mountvscs mount

This makes CS-mount lenses well-suited for embedded vision applications where space is limited, such as in surveillance cameras and some machine vision systems.

We have a large portfolio of machine vision lenses available online. Additionally, we offer some custom solutions for lenses, ensuring you find the best fit for your machine vision system. Explore our portfolio of machine vision cameras, where the standard mount is C-mount, but we also provide options to select CS-mount or S-mount(M12 mount) in some models.

The main difference between C-mount and CS-mount is the flange focal distance (FFD), which is the distance between the lens mounting surface and the image sensor. C-mount has an FFD of 17.526 mm, while CS-mount has a shorter FFD of 12.5 mm.