SLRcamera

The focal length of a lens converges light so that the image of an object is focused onto the sensor. This determines the angular field of view, a parameter of the overall field of view. This is defined as the angle between any light captured at the horizontal and any light captured at the edge of the of the object. All of these parameters play a role in determining the FOV of a camera and can be measured using either trigonometry and the angular field of view, or via an optical test, in which a black body is utilized to create a virtual image

Feb 10, 2017 — As Michael Clark stated in his answer, a camera system is diffraction limited when the size of the Airy disk (the blur) caused by diffraction ...

To measure the FOV of UV, visible and infrared cameras, optical tests are commonly used. During the test, light is focused from a black body (an object that absorbs all light that falls on it) onto a test target at the focal place. By using a set of mirrors, a virtual image can be created that is at an infinitely far distance.

Oct 1, 2020 — ... calculate a camera's FOV. FOV (in arc-min) = 3436 * D / L. D is the sensor dimension in mm. L is the FL in mm. Plugging in the numbers you get ...

The focal length of the lens describes the distance between the lens and the focused image on the sensor. As light passes through the lens it will either converge (positive focal length) or diverge (negative focal length), however within cameras the focal length is predominately positive. Shorter focal lengths converge the light more strongly (i.e. at a sharper angle) to focus the subject being imaged. Longer focal lengths, in comparison, converge the light less strongly (i.e. at a shallower angle) in order to focus the image.

The installers were polite, clean, professional and on time! They installed a regular digital thermostat that was not programmable. When I questioned that type ...

In lower price ranges you'll be looking at infrared cameras/monoculars and mostly be limited to the range of the infrared lights they come with.

I recently took a road trip with my wife and had my film and some cameras with me. One day we were at the beach and i had to leave my camera bag(s) in the trunk, with both undeveloped and developed film. 35mm, 120 and 220. All formats in both E6 and C41. When i returned to the car after maybe 3 hours, i popped the trunk open. The camera bag was warm to the touch as were my metal bodied cameras. So were the films that we re inside the bags. Not "ouch" hot, but warm.The temperate outdoors was 90 degrees. I have not sent my film to the lab yet, but have since kept it in its normal place in the fridge. Just curious as to what i can or cannot expect. 1:22PM, 5 August 2015 PST (permalink)

kuronakko: LOL, i would actually bring a "film cooler" next time. 113 months ago (permalink)

Bellowscamera

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Ricardo Sforza: Two options: 1) as the beer is drunk, there is more room for film, or 2) as the film is shot, there is more room for beer. Note that 1) and 2) are not mutually exclusive. ;) 113 months ago (permalink)

Having left film in a hot car several times, I've never had any noticeable issue. Let us know how it turns out. 113 months ago (permalink)

In my experience, the glove box in a car is like an oven in the summer and a fridge in the winter. The same would apply to a lesser degree to the car boot / trunk because the area is bigger, takes longer to heat up/cool down and more air can circulate. I have found the best solution was to park in a shaded area so the car doesn't get direct sun and store the film and equipment in the boot / trunk in a large solid camera case / suitcase type. Having spent the last 35 years shooting weddings professionally in Ireland, the sun and heat were never that much or a problem, only the odd time. I spent more time avoiding the cold and rain. 113 months ago (permalink)

View camerahistory

Thorlabs' Fabry-Perot Quantum Cascade Lasers (QCLs) exhibit broadband emission in a range spanning roughly 50 cm-1. Each QCL's specified output power is the sum ...

Decisions, decisions .... Should I take the film cooler or the beer cooler ? Eenie minnie, mynie moe ... Originally posted 113 months ago. (permalink) Ricardo Sforza edited this topic 113 months ago.

I think it's more about longterm exposure to heat that's the issue to avoid. Just like any piece of equipment, they can handle exposure to heat, just not long storage in it. I've not had any issues of heat affecting film, and I used to live in the desert. But, I've never left a camera on a dashboard in a car. The trunk should be pretty hot as well. If it's not melting plastic, than the film is probably just fine. Originally posted 113 months ago. (permalink) Circles_of_Confusions☯ edited this topic 113 months ago.

I put a thermometer inside the glove box on similar summer day, left my grey color car in open parking lot, windows closed.. When I came back two hours later, the mercury marked 60 degrees C ( 140 F ) 113 months ago (permalink)

120 degrees in the car for 4 hours Velvia 50 and it all worked out fine. 113 months ago (permalink)

USB Cameras are imaging cameras that use USB 2.0 or USB 3.0 technology to transfer image data. USB Cameras are designed to easily interface with dedicated ...

Earthcamera

The sensor size is determined by both the number of pixels on the sensor, and the size of the pixels. Different sized pixels are used for different applications, with larger pixels used for higher sensitivity, and smaller pixels used for higher spatial resolution (find out more on Pixel Size and Camera Resolution).

The gain relates the number of photoelectrons released to the gray levels displayed, and can be used to enhance contrast for low-light imaging.

I often bring film I have in the refrigerator to the car and then return it at the end of the day to the refrigerator. All film is still in the original foil (120 mf film Velvia 50 and Tmax 100). I wonder if the cold - hot - cold routine is worse? 113 months ago (permalink)

Figure 3 shows a simplified version of how these assumptions allow for AFOV calculation. By using trigonometry, the AFOV can be expressed as:

There are two processes which can be used to enhance UV sensitivity for wavelengths >200 nm: UV photon conversion, and anti-reflection coatings.

Thanks everyone! i feel much better. They will be sent out Next week. I forgot to mention all were ISO400 or less, if that matters. 113 months ago (permalink)

This means that the distance of the focal length is determined by how strongly the light is converged by the lens in order to focus the subject being imaged. This, in turn, influences the angle from the horizonal of light that can be captured by the lens. This is known as the angular field of view (AFOV) and is required to determine the overall FOV. The AFOV is the angle between any light captured at the horizonal, and any light captured at the edge (as shown in Figure 2). If you have a fixed sensor size, altering the focal length will alter the AFOV and therefore the overall FOV. A shorter focal length provides a larger AFOV view, and therefore a larger FOV. The same is true but vice versa for longer focal lengths, as indicated in Figure 2.

Field of view defines the maximum area of a sample that a camera can image, determined by the focal length of the lens and the sensor size.

A simple microscope or magnifying glass (lens) produces an image of the object upon which the microscope or magnifying glass is focused. Simple magnifier ...

LivecameraViewer

This allows the FOV dimensions (i.e. vertical and horizontal distances) to be measured without knowing lens focal length or sensor size. The image created, including the target, is then displayed on a monitor, with the target image being a subset of the full image display. This allows the FOV to be approximated as:

LiveCamera

Our experience with heat abuse in film points to, likely the film manufactures have tested the emulsions with heat and fluctuations. They must have. 113 months ago (permalink)

Field of view (FOV) is the maximum area of a sample that a camera can image. It is related to two things, the focal length of the lens and the sensor size. Figure 1 shows a comparison between the field of view and the size of the sensor. Assuming that the focal length of the lens is the same, the larger the sensor the larger the field of view.

Sensor size is determined by both the size of the pixels and number of pixels on the sensor. This can be optimized for each application, with larger sensors optimal for sensitivity limited applications, and smaller sensors optimal for resolution limited applications.

Webcamera

Light Diffuser Films · Cast PVC · 2 mil thick · 7 year durability · Satin finish · Indoor / outdoor use ...

As you turn the barrel of your lens to zoom in, you can look at the scale on the end of the lens that connects to the camera to see what specific focal length ...

Shuttercamera

I found this roll of film I had shot around 1990-91 and processed it in 2012. It had also spent 8 years in a non-climate controlled mini warehouse. It endured lots of different temperature changes and still looked pretty good. 113 months ago (permalink)

Pic16Bit: Thats probably the same thing that mine went through. 113 months ago (permalink)

See how others are using our high-performance cameras, spectrographs and optics-based solutions to advance their research and application.

There are many subcategories of UV light, each which need different sensor requirements. These include both physical and chemical sensor changes.

Bring a mini-fridge with a very long extension cord next time :) 113 months ago (permalink)

Acton optics and coatings provide ultra-precision optical components and coatings with an emphasis on the UV/VUV spectral regions.

Where D is the full display image dimensions (either horizontal or vertical), and d is the target dimensions (either horizontal or vertical).

Fiber optic is a great choice for bringing LED light into difficult to reach spaces, and Evan Designs is proud to offer high quality optic strands.