LUCID Vision Labs, Inc. designs and manufactures innovative machine vision cameras and components that utilize the latest technologies to deliver exceptional ...

The narrow-band excitation provided by this filter set is useful in applications where fluorochromes such as Texas Red or AlexaFluor 594 are also present in the same sample. This set will minimize bleedthrough of these fluorochromes. Best FISH filter set for Far Red probes.

Tailored for life sciences applications, offering precision and reliability to enhance imaging solutions such as fluorescence microscopy and cellular imaging.

Expertise in optical filter technology, a deep understanding of applications in life sciences and clinical instrumentation.

State-of-the-art equipment ensures the quality of optical components by conducting in-house testing for imaging performance.

In the dynamic landscape of rapid product development, transforming ideas into prototypes swiftly is essential across diverse applications.

Camerafocus ring

I was going to answer along those lines, but you beat me to it. The extra mark is undoubtedly a pointer to the number that would have been above the line if they could have fit it in.

Chroma’s 49000 series of single band sets features our highest throughput sputter coatings (ET) which achieve the highest transmission levels for interference filters. These filters have very steep transitions from peak transmission to high optical density to best exploit the spectral properties of modern fluorochromes with short Stokes shifts. This is because steep transitions allow for very little spectral separation between excitation and emission bands. These filters offer the greatest hardness and durability against environmental factors such as high heat and humidity, and are covered by Chroma’s lifetime warranty. All ET filters sets provide zero-pixel-shift image registration* between filter sets, at no additional cost. *It is important to note that filters are only one factor in achieving perfect image registration in imaging systems. All other components and devices must also be in register.

Tilta SeamlessFocusGearRing

Our filters optimize industrial processes like machine vision and quality control, fostering efficiency and innovation across diverse sectors.

We manufacture high-quality, narrow-band spectral line filters for detecting ionized sulfur, oxygen, and other elements.

So instead I'll venture a wild stab at an answer to your question about the dot on the 24-105. Given the placement of the dot, and given the fact that it's not uncommon to use the 24-105 on an APS-C camera, I suggest that it indicates the point (approx. 32mm) at which the lens subtends the angle of view of the human eye when used on an APS-C camera (i.e., the focal length whose "full-frame equivalent" is 50 mm). I told you it was a wild guess; but it's my guess, and I'm sticking with it!

Satellite imaging, remote sensing, or aircraft instrumentation, our optical filters ensure precision and clarity, vital for navigation, reconnaissance, and scientific exploration.

Manufacturing capabilities for high-performance optical filters involve precision techniques like thin-film coating and optical design.

Raman filters are ideal when you need higher transmission values, fast transitions, and superior blocking to keep out unwanted photons.

I own 12 different EF and EF-S Zoom lenses. 5 of them have a mysterious index mark on focal length zoom ring as shown in the photos below.  The 24-105mm USM also has a little white dot. I circled the markings in Red.

Find lens focus ring sizenikon

In the consumer electronics market, optical filters offer enhanced imaging capabilities for displays, cameras, and smartphones.

If you google the world 'polarized', you get two types of meaning. 1. Chemistry: When two molecules are in covalent i.e. sharing 50–50 of ...

OCT is not an insured service through provincial health insurance (OHIP) for any patient when performed by an optometrist and in limited cases when performed by ...

Optical Engineering for design and manufacturing needs, we’re building unique and innovative OEM manufacturing solutions today.

LensFollowFocus Ring

Designed for next-generation SuperSpeed USB device connections, the 6ft USB 3.0 cable offers a throughput of up to 5 Gbps when used with a USB 3.0 host and ...

"The range from 24 - 50mm is squeezed into half the space, and the range from 24 - 35mm is only about 1mm along the zoom ring: the distance between the bar to the right of 24mm to the dot to the left of 35mm! These focal lengths are so close that Canon couldn't fit the numbers on the ring so they had to put those little marks there instead! This makes it very difficult to select exact settings at the wide end".

I think I figured it out.... Looking at the photos all together it sudden occurred to me that the little white index is at the end of the focal length travel and it is there just because the numbers at the end of the travel don't line up with the focal length index. I'm guessing it's just the way Canon wanted to space out the numbers on the zoom ring.

10 Imtec LaneBellows Falls, VT 05101 USTel 800-824-7662Fax 802-428-2525sales@chroma.comMedia Queries: media@chroma.comTerms of Use Privacy Policy

Expert guidance and comprehensive support from initial consultation to final implementation, including customized solutions.

Filters play a crucial role in enhancing clarity, color accuracy, and contrast in machine vision applications where details matter.

Experienced in serving the scientific, biomedical, and photonics communities we know how to design and deliver optical filters.

Find lens focus ring sizecalculator

After some Google research I found out that the white dot indicates the 28mm focal length and that there just wasn't enough room for "28" on the lens barrel.Mystery solved!

Find your FLUKE LASER SHAFT ALIGNMENT TOOL,5 55/64 IN L at Grainger Canada, formerly Acklands-Grainger. We have been Canada's premiere industrial supplier ...

I think I figured it out.... Looking at the photos all together it sudden occurred to me that the little white index is at the end of the focal length travel and it is there just because the numbers at the end of the travel don't line up with the focal length index. I'm guessing it's just the way Canon wanted to space out the numbers on the zoom ring.

All transmission and blocking (OD) data are actual, measured spectra of representative production lots. Spectra varies slightly from lot to lot. Optical density values in excess of 6 may appear noisy because such evaluations push the resolution limit of low light level measurements.

Optical filters play a crucial yet often overlooked role in semiconductor manufacturing, where nanoscale precision can make or break a product.

High-performance optical filters specifically designed, our precision-engineered filters enable astronomers to achieve clearer views of celestial objects.

A prism is simply a medium shaped in a certain way. In the path of a ray of light, what a prism does is split the wavelengths just like water would do, and the ...

Optical Design Software for Windows® and Mac OS. There are dozens of optical design software programs available from numerous vendors and developers. The ...

Can it be used for exterior application? As it is 316 grade Stainless Steel it is suitable to be used both inside and outside.

We use these in our dissection labs to hold our specimen to keep fingers out of the way of sharp instruments. A must have for science... Read moreread more ...

How did you determine that? By taking a picture with the lens set on the dot and having the Exif tell you it was at 28? It you're right, maybe the dot is aimed at users who upgraded from the earlier EF 28-105mm f/4.5-5.6. But that's at least as far-fetched as my other guess.

If you don’t see what you are looking for, please contact us. We have a large inventory of filters and a knowledgeable staff ready to help you design and build a filter to meet your specifications.

An extensive range of solutions, from the ultraviolet to the infrared, for major microscope brands and custom-built systems.

The 24-105 is at its minimum length at 24 mm and is normally parked there (at least by me). So far, I still prefer my original guess.

If you hate the sensation of seeing your own eye look back at you because of glare in your glasses, an anti-reflective coating will eliminate that. An anti- ...