#fixed lens

[jefkphotography]

A fixed 18 mm lens, a fixed 35 mm lens, a fixed 50 mm lens or a fixed 85 mm lens for portraits.

[retroactivepixels]

Warm october day.

[ultralowoxygen]

Barrel Cactus by Mark Hopkins Via Flickr: Ferocactus cylinderaceus common name is California Barrel Cactus. One of the unique characteristics of this cactus is that it always grows on a south facing slope. Shot with an Olympus 35 LC using Kodak Portra 400. I made a mistake and left the iso at 160 so wasn’t sure how it would come out as I did not change the development time. Looks like it did not have much effect. Used an Arista C-41 kit.

[gryphon1911]

Nikon Coolpix A Compact Camera Review

© Nikon Introduction I’ve always liked the idea of a compact fixed lens, fast aperture camera. Usually, I am one to shoot at the longer end of the focal range…but sometimes you just want a small camera that can fit into a small bag, coat pocket…but is better than your cellphone. I’ve dabbled in quite a few cameras, from the Sigma DP, the Ricoh GR II and GR III. Out of those, the Ricoh GR II…

[menzelrobovision-blog]

Choosing the Right Machine Vision Lens: A Comprehensive Guide

Machine vision technology has rapidly evolved, and selecting the appropriate lens for your application is now more critical than ever. With the wide variety of lenses available, choosing the right one can be a daunting task. However, by considering a few key factors, you can make an informed decision that will significantly impact the performance and image quality of your machine vision system. In this comprehensive guide, we will delve into the various aspects of selecting the perfect machine vision lens to meet your specific needs.

Fixed, Varifocal, or Zoom:

The first decision to make when choosing a machine vision lens is whether you need a fixed, varifocal, or zoom lens. Each of these options has its own set of advantages and is suited for different applications.

Fixed Lenses: Fixed lenses are an excellent choice when you have a consistent working distance and require sharp, high-quality images. These lenses have a fixed focal length, meaning they do not offer the flexibility to adjust the zoom or focus. If your application involves stationary objects or a controlled environment where the working distance remains constant, a fixed lens is a cost-effective and reliable choice.

Varifocal Lenses: Varifocal lenses are designed for situations where the subject is in motion or may require frequent refocusing. These lenses offer the flexibility to adjust the focal length and focus, making them ideal for applications that involve objects at varying distances. Varifocal lenses can save time and effort by allowing you to adapt to changing conditions without replacing the lens.

Zoom Lenses: Zoom lenses are the most versatile of the three options. They can adapt to distant subjects by changing the focal length, providing you with the ability to zoom in or out as needed. This adaptability is particularly valuable in applications where the working distance is not constant, or when you need to capture fine details in both nearby and faraway subjects. While zoom lenses offer flexibility, they are typically larger and more complex, which can result in a higher cost.

Focal Length and Focus:

The focal length of a machine vision lens plays a crucial role in determining the field of view (FOV) and the magnification of the image. Understanding how to choose the right focal length is essential for capturing the desired image.

Field of View (FOV): The focal length directly affects the FOV. A longer focal length will provide a narrower FOV, which means the lens will capture a smaller area with greater detail. Conversely, a shorter focal length lens will result in a broader FOV, allowing you to capture a larger area but with less magnification. When selecting the focal length, consider the size of the objects or areas you need to capture in your application.

Magnification: In addition to FOV, the focal length also determines the magnification of the image. Longer focal lengths result in greater magnification, making them suitable for applications where fine details are essential. Shorter focal lengths, on the other hand, provide lower magnification but are ideal for applications where capturing a larger area is a priority.

To choose the right focal length for your machine vision lens, you need to have a clear understanding of your application's requirements and objectives. Analyze the size and details of the objects you are inspecting to determine the optimal focal length for your specific case.

Aperture and Lighting:

The relationship between aperture and lighting is critical for achieving the desired depth of field and image quality in machine vision applications.

Aperture: The aperture of a lens controls the amount of light that enters the camera sensor. It is typically represented by an f-number (e.g., f/2.8). A smaller f-number indicates a wider aperture, allowing more light to enter, while a larger f-number means a narrower aperture, which restricts the amount of light. Selecting the right aperture is essential to achieve the desired depth of field.

Depth of Field (DOF): The depth of field is the range within which objects appear acceptably sharp in an image. It is influenced by the aperture size, with wider apertures producing a shallower DOF and narrower apertures providing a deeper DOF. The choice of aperture depends on your application's requirements. If you need to capture fine details in a specific focal plane, a narrow aperture might be suitable. For situations where multiple objects at varying distances must be in focus, a wider aperture may be preferable.

Consider the lighting conditions of your environment, the specific requirements of your application, and the depth of field you need to achieve when selecting the aperture for your machine vision lens.

Resolution and Accuracy:

When it comes to machine vision, resolution and accuracy are paramount. To ensure the best results, you must find a lens that offers the highest resolution for your subject or operation. Consider various factors, including image clarity, application demands, available options, and cost-benefit analysis.

Resolution: Resolution refers to the lens's ability to capture fine details in an image. Higher resolution lenses produce sharper and more detailed images, which can be crucial for applications that require precision, such as quality control and measurements.

Application: The specific application of your machine vision system will dictate the level of resolution required. If you are inspecting small electronic components, you will need a lens with exceptional resolution to detect defects. On the other hand, if your application involves monitoring large industrial processes, a lower resolution lens may suffice.

Cost-Benefit Analysis: While higher resolution lenses offer superior image quality, they can be more expensive. Therefore, it's essential to perform a cost-benefit analysis to determine the optimal balance between resolution and cost for your application.

By carefully considering these factors, you can select a machine vision lens that provides the resolution and accuracy required for your specific needs.

Working Distance:

Selecting the correct working distance is crucial when choosing a machine vision lens. Designers calculate the needed working distance using various factors, including focal length, the length of the inspected object, sensor size, and the size of the objects being observed.

Focal Length and Working Distance: The focal length of the lens plays a significant role in determining the working distance. A longer focal length results in a greater working distance, while a shorter focal length is associated with a shorter working distance. To ensure that the lens can effectively capture the desired field of view, it is essential to match the focal length to the working distance required for your application.

Object Size: Another factor to consider is the size of the objects you are inspecting. If your application involves large objects, you may need a lens with a longer working distance to maintain a suitable field of view.

By carefully calculating the working distance based on the focal length, object size, and other parameters, you can ensure that the lens you choose is perfectly suited to your application's requirements.

Sensor Compatibility:

Different sensors require different lenses, and it's crucial to select a lens that is compatible with your camera's sensor type and size. Sensor compatibility directly affects the image quality and the lens's ability to cover the desired field of view.

Sensor Size: The size of the camera sensor influences the field of view. Smaller pixel sensors require higher resolution lenses to achieve better image quality, as they capture more detail in a smaller area. In contrast, larger sensors require larger lenses to cover the same field of view.

Sensor Type: The type of sensor, whether it's a CCD or CMOS sensor, also plays a role in sensor compatibility. Different sensors have varying sensitivity to light and may require adjustments in the lens to optimize image quality.

When selecting a machine vision lens, consider the sensor size and type of your camera to ensure that the lens can effectively cover the desired field of view and produce high-quality images. Matching the lens to the sensor is essential for achieving the best results in your machine vision application.

Camera, Mount, and Location:

Compatibility with your camera and its physical location is another critical aspect of choosing the right machine vision lens. Ensuring that the lens aligns with the camera's sensor type and mount is essential for seamless integration.

Camera Sensor Type: Confirm that the lens is compatible with the sensor type of your camera, whether it's a CCD or CMOS sensor. Mismatched sensors and lenses can result in reduced image quality and potential compatibility issues.

Lens Mount: Different cameras use various lens mounts, such as C-mount or CS-mount. Ensure that your lens choice matches the camera's lens mount to facilitate easy installation. An incompatible mount can lead to alignment problems and may require additional adapters or adjustments.

Camera Location: Consider the physical location of the camera in your machine vision system. If the camera is difficult to access, you may want to opt for a lens with remote focus, iris, and zoom control capabilities. For instance, the LensConnect Series offers power and control through USB, allowing you to remotely adjust focus, zoom (in the case of varifocal lenses), and iris. This feature can simplify camera setup and maintenance, particularly in industrial or hard-to-reach environments.

Choosing a lens that seamlessly integrates with your camera and its location is essential for ensuring the optimal performance of your machine vision system.

Conclusion:

Selecting the right machine vision lens is a crucial decision that directly impacts the performance and image quality of your vision system. Before making your choice, consider the following key factors:

Fixed, Varifocal, or Zoom: Determine whether your application requires a fixed, varifocal, or zoom lens based on the working distance and subject characteristics.

Focal Length and Focus: Choose the focal length that aligns with your field of view and magnification requirements.

Aperture and Lighting: Select the appropriate aperture to achieve the desired depth of field and image quality based on your lighting conditions.

Resolution and Accuracy: Consider the application's demands and perform a cost-benefit analysis to determine the required resolution for your lens.

Working Distance: Calculate the working distance based on focal length, object size, and other factors to ensure the lens effectively captures the desired field of view.

Sensor Compatibility: Match the lens to your camera's sensor type and size to optimize image quality.

Camera, Mount, and Location: Ensure compatibility between the lens and your camera's sensor type, lens mount, and the camera's physical location.

By thoroughly evaluating these factors and understanding your specific application's needs, you can make an informed decision and select the best machine vision lens to achieve exceptional results in your machine vision system . Information flows from the lens first, so choosing the right lens is a fundamental step in the success of your machine vision project. To Know More About Machine Vision Lens Visit:http://mvrpl.com/index.html

[molinaesque]

"Go away. You're too late." "Oh, it's a hell of a place. It says something about the late Marcus that he found imprisoning your sister to be a greater mercy than killing her." "Killing isn't mercy." Silco chuckles. " A spark of rebellion still burns inside that husk, I see. No... killing is a cycle. One that started long before Vander and me. And it will continue long after the two of you." "I'm done running in circles." "We build our own prisons. Bars forged of oaths, codes, commitments. Walls of self-doubt and accepted limitation. We inhabit these cells, these identities, and call them "us." I thought I could break free by eliminating those I deemed my jailors. But... Jinx... I think the cycle only ends when you find the will to walk away."

[lenle-g]

from this fic WIP by @mariashades, requested by @janetm74 <3

The engine of Lee’s little Piper PA-28 fixed wing roared into life and little Scotty, all of four years old, squealed in alarm and clapped his hands over his ears. Jeff, standing well back at the hangar, scooped Scott up and held him close until the plane had taxied over to the runway.  “Y’know, planes aren’t that scary,” he fondly said as soon as the plane was far enough away. “It’s just noise, nothing to be afraid of.”  “‘S not?” Scott asked, big eyes looking up at his father as he peeled his hands away from the sides of his head.  “Nope.” Jeff smiled. “Besides, we need the noise to fly, and that’s what we’re here to do, right?”  “Right.” Scott nodded, his little face so serious it made him go all gooey on the inside at the sight.  “So,” Jeff affected a serious mein (Lucy always called it his ‘Top Gun’ face), pulled his aviators out from where he’d hooked them on his shirt and put them on his nose. “Let’s saddle up, kiddo.”  Scott immediately put on his kiddie sized aviators (and Jeff went even gooier on the inside) and announced “Let’s saddle up!”  “Attaboy!” Jeff beamed as he walked over to his plane.

[elderwisp]

𝔄𝔫𝔡 𝔪𝔶 𝔩𝔬𝔳𝔢 𝔦𝔰 𝔫𝔬 𝔤𝔬𝔬𝔡 𝔄𝔤𝔞𝔦𝔫𝔰𝔱 𝔱𝔥𝔢 𝔣𝔬𝔯𝔱𝔯𝔢𝔰𝔰 𝔱𝔥𝔞𝔱 𝔦𝔱 𝔪𝔞𝔡𝔢 𝔬𝔣 𝔶𝔬𝔲 𝔅𝔩𝔬𝔬𝔡 𝔦𝔰 𝔯𝔲𝔫𝔫𝔦𝔫𝔤 𝔡𝔢𝔢𝔭 𝔖𝔬𝔯𝔯𝔬𝔴 𝔱𝔥𝔞𝔱 𝔶𝔬𝔲 𝔨𝔢𝔢𝔭

[mishy-mashy]

Bruce is actually really attractive, and I have enough reasoning to make a list

He's:

Tall (. Tall enough to hit his head on the vault doorframe)

Long-legged

Has a straight nose bridge

Has high cheekbones (more noticeable in 2nd pic below)

Has a strong jawline

Sharp eyes, but they aren't small (plus eyebags if you're into that)

Overall, he has strong, attractive facial features

Has broad, refined shoulders. You can tell he works out (or he did, when he was alive)

Even has a thick, muscly neck

He has MUSCLE. Is SCULPTED. NOICE. VERY NOICE. (nice arms. Nice shoulders. Nice neck. Nice legs. Nice butt-)

(There are actually panels where you can see some of his muscles. Other than those already shown here, he's got bricky thighs-

-and in the panels where we first get his name dropped, he's got those shoulder blades too-)

The one time we see him smile, and he actually has a scary one

Has small, kinda sharp pupils, and his eyes remind me of a cat. We only ever saw him tense or defensive, so his resting/listening face is really cute

Other than the physical appearance stuff, he also:

Takes shit without batting an eye (patience, knowing it's just how Kudo is, etc)

Kudo being all "Cut the crap Bruce and give it to me straight", after Bruce tests his blood and is rightfully Concerned because they just faced AFO

Put up with Kudo's experimenting and testing over Yoichi's transferable Factor

Did ya'll see the look on Kudo's face when he realized he had Yoichi's Factor/will? Kudo was going to start in nonsense and Bruce just dealt with that.

Also something I noticed when looking back at the images here; Bruce has bandages on his arms in the void. But not when he faced AFO in the sewers.

Were he and Kudo cutting their arms open in their experimenting over Yoichi's theory? Is this why Kudo has two gauntlets instead of his one? Why we never see his bare arms in the void? That he always keeps his arms down so there's no slip?

Is smart enough to run blood tests, plus has enough common sense to pick Shinomori as his successor

He picked a guy who avoids society, has an Ability to detect danger so he can always stay away from AFO, is also a coward so he's never going to go throw himself into danger, even without knowing instinctively he stands no chance, etc.

Meanwhile, Kudo chose Bruce, who he played Hot Potato Yoichi with; but he did also trust Bruce, and put the only pure combative Ability in OFA through Bruce.

These two made their choices based on what they valued and saw the Factor needed.

Is logical, analytical, and calm.

He tried advising Midoriya on their Abilities in One For All, especially his own.

Midoriya then tried ignoring him about using Fa Jin for the first time, but found he was right, thinking: "Dammit!! I had [Lady Nagant] right where I wanted her, but... ugh! The Third was right. My parallel Quirk processes are all screwed up!" (ch. 314).

Plus, when Midoriya fixed his processing mistakes, Bruce was analyzing the way he reached his new conclusion. Pure facts, no bias, very calm, just saying it as it was.

We never see him panic. When he's caught by surprise in the sewers by AFO, Kudo, and Yoichi's little bubble event, he immediately reacts. He doesn't falter, he just knows he has to do something right now.

Was more willing to listen than Kudo to Yoichi's beckon, and probably was just following Kudo's rejection of Midoriya

While we don't see Kudo's face, we see Bruce's eyes when Yoichi calls on his heroes. Bruce was more open and receptive, or at least more impacted.

Bruce was also the one to start talking, while Kudo just kept quiet.

He actually communicates a lot

When Yoichi called them to support Midoriya, Bruce started talking to paint a picture of why they thought the way they did, so Yoichi understood where they were coming from.

(Though he seems to beat about the bush sometimes, since Kudo spoke up to be direct on how they couldn't just put their trust in some starry-eyed teenager. Plus, when Kudo tells him to just tell him what's wrong [double Factors])

When Midoriya first used Fa Jin against Nagant, Bruce came out just to tell him he knew what he was trying, but that Midoriya wasn't ready; and Midoriya found he was right. Midoriya just didn't want to listen to him then.

He asks Kudo for clarification after finding Kudo had two Factors in him after the sewer incident ("Just to be sure, All For One didn't touch you, right?") Kudo knew him well enough to go "stop beating around the bush and tell me", so Bruce was probably gonna start with questions, theories, and trying to understand everything in general, before saying "yeah you have two Factors. Don't know why".

Is strong-willed and loyal.

He followed Kudo, even to death, carrying on the cause he started until it ended with him.

Plus, when talking about how AFO needs a strong will to override OFA's own, we first see Bruce, Kudo, and Yoichi.

AFO couldn't steal OFA because the will was too strong for him, and that was back during Banjo's time. Since Shinomori never actually tried opposing AFO and just hid, we can assume the first Three (Yoichi, Kudo, Bruce) already had an accumulation of strong willpower that made OFA un-stealable. Those three are a strong enough foundation, and the main wills, that the other users just become bonuses.

Kudo, also saying that Midoriya needs allies with the same will and drive as him... hey Kudo, you're talking about yourself and your old allies, aren't you? That's why you look at Yoichi and Bruce when you say this.

Not only is Bruce attractive, but he's got good character. THE END.

[theoppositeofprofound]

my other dungeon meshi belief is that laios and falin get their propensity towards magic and seeing ghosts from their mom’s side of the family. amid all the superstitions she knows to chop falin’s hair off! unnamed toudenmom who had a cousin die young with hallucinations, who gets nauseous in forests and wild places, whose grandmother used to make charms with strands of her own hair. she blames herself for her babies needing to go away. neither of them ever learn that she’s right.

[jefkphotography]

A fixed/prime 14 mm lens is also quite good for self portraits, and selfies to my experience, when you make selfies with the photocamera in one or two hands.

[retroactivepixels]

Dead alien. Oh, it's just an intriguing-looking root...

[ventismacchiato]

SCARASTAR COLLAB MERCH

[pattrat]

original wxs len? 🥺

Yes.

[naturalb0rn4ng33l]

y’all might crucify me for this but i feel like tagging #ethel cain in your paragraph of random #girlblogging #southerngothic #coquette tags, especially if the image above it has in fact nothing to do with ethel cain or her music is just as bad as isaiah ATE 💜 ethel cain lore tiktok fans.. this is because both of these groups of people reduce her to an aesthetic, some sort of passing viral trend, when i don’t think that’s what she signed up for at all. believe it or not there is a difference between an artist’s vision/concept/character/universe and whatevercore yall might come up with next