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It is a wonderful program to use now that I have figured out what today. It is very easy to move around in the program too. Thank you for the intro videos too!
2015-06-22
Admin just getting started with PDFfiller - so far this is great! Easy to use and appears to provide all desired options for helping to get our required results. THANKS PDFfiller!
2018-09-12
This is by far the best I have tried; awesome features, well designed and intuitive as can be. Deeply regret I cannot afford to buy it; I run a very new, very poor legal aid society with 0.00 left in our budget for such things. Recommended highly.
2019-03-14
Fabulous addition for the office!!…
We added this for our company in the office as a tool to try out and make things easier. Honestly I have used it far more than I thought. No more printing out anything to fill out and sign it and then scan it back and send it. You can upload and fill in the spaces, check any boxes and sign it, save it and email it right over, and it looks so much more professional too.
2024-07-16
If you want a great PDF software with support you cant go wrong with PDFfiller
Yesterday, I needed assistance with a PDF, which, when it was submitted to PDFFiller, would change the computer bar and make it into numbers. Since I needed this document in its original form, I contacted their customer service, and Kara helped me. Kara went out of her way to make sure my problem was resolved. It was really nice to talk to a real human instead of a bot, and that human being was so kind and able. My problem is not completely resolved, but she taught me how to be able to fill the PDF without losing the bar and eventually make a template, which is what I need to do. Awesome team-mate, you got there, PDF Filler!
2024-02-27
It is easy, so relax and just do what you need to do.
I am so very, very pleased with how easy the program is to use. I tried others for this emergency situation and was frustrated out of my mind with the complicated programs. This one is easy, easy and very effective.
2023-10-15
Awesome Program
Awesome tool. I can modify PDFs easily. I have used it a lot since I got it. I really didn't know how much I would use it, but I use it a lot.The program itself is super easy to navigate. Not a single complaint. Easy to use.
2021-03-07
AMAZING CUSTOMER SERVICE
I was charged a subscription fee and I didn't understand why, so I contacted the company via chat. The agent that assisted me was amazing!! She totally understood and was very helpful. She was extremely professional. I really expected that this was going to be a very unpleasant experience for me, but it was absolutely pleasant and positive! Thank you! I would give many more stars if I could.
2021-02-27
Your company is great
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2020-05-09
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What is diffraction limited resolution?
An optical system with the ability to produce images with angular resolution as good as the instrument's theoretical limit is said to be diffraction limited. The resolution of a given instrument is proportional to the size of its objective, and inversely proportional to the wavelength of the light being observed.
What is meant by the diffraction limited resolution of a telescope?
angular resolution. Ability of a telescope to distinguish between adjacent objects in the sky. Diffraction-limited resolution. Theoretical resolution that a telescope can have due to diffraction of light at the telescope's aperture. Depends on the wavelength of radiation and the diameter of the telescope's mirror.
What is the diffraction limit of a telescope?
What is the diffraction limit of a telescope? The minimum angular separation of two sources that can be distinguished by a telescope depends on the wavelength of the light being observed and the diameter of the telescope. This angle is called the DIFFRACTION LIMIT. In this equation, the computed angle is in radians.
What is meant by resolution of a telescope?
The angular resolving power (or resolution) of a telescope is the smallest angle between close objects that can be seen clearly to be separate. Resolution is limited by the wave nature of light.
What does diffraction limited mean?
Diffraction limit means that an imaging lens could not resolve two adjacent objects located closer than /2NA, where is the wavelength of light and NA is the numerical aperture of the lens. E.g. the resolution of optical imaging instruments, is fundamentally limited by the diffraction of light.
How does diffraction affect resolution?
Diffraction causes points of light which are close together to blur into a single spot: it sets a limit on the resolution with which one can see. If the light passes through a circular aperture.
Why do you think this limit of resolution is described as diffraction limited?
There are many situations in which diffraction limits the resolution. The acuity of our vision is limited because light passes through the pupil, the circular aperture of our eye. Be aware that the diffraction-like spreading of light is due to the limited diameter of a light beam, not the interaction with an aperture.
What does it mean to be diffraction limited?
An optical system with the ability to produce images with angular resolution as good as the instrument's theoretical limit is said to be diffraction limited. The resolution of a given instrument is proportional to the size of its objective, and inversely proportional to the wavelength of the light being observed.
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