Questions tagged [mtf]
The mtf tag has no usage guidance.
18
questions
0
votes
2
answers
66
views
Am I correct that there are just two optical limitations to resolution / MTF: aberrations and diffraction?
Bit of a semantic (and potentially naive) question here really, but I'm writing an article and want to be sure I'm correct.
Can everything that limits the MTF of a lens except the diffraction limit be ...
0
votes
1
answer
193
views
Is this MTF chart real?
I stumbled upon an MTF chart, which looks wrong. It's for Kowa LM5NCL lens: https://www.kowa-lenses.com/en/lm5ncl-mp-industrial-lens-c-mount?number=10097. Here is the chart in question:
It shows the ...
- 101
3
votes
2
answers
337
views
How to calculate MTF ? Need help with the formula
I'm trying to reproduce MTF chart programmatically but I'm stuck at some point.
I'm starting with a clean bar chart like this:
I then take a picture of this pattern with a smartphone (printed on HD ...
- 151
3
votes
1
answer
148
views
Using MTF, how can I discover the smallest detail a smartphone camera can resolve for use in generating QR codes?
Given a chart I created myself, resembling e-sfr charts, a smartphone and a MTF plot, how could I discover the smallest resolvable detail, dimension wise ? The problem with smartphones is that we don'...
0
votes
1
answer
114
views
How do I transform LP/pixel to LP/PH in MTF plot?
I'm working on computing MTF plots for smartphone camera. I've a working code in Python inspired by plenty of codes found online, MATLAB, Peter Burns and his sfrmat etc.. which computes the data from ...
0
votes
1
answer
383
views
What is considered a good / great LP/PH value?
After combing through ISO 12233 and reading multiple articles, I'm still unsure what LP/PH values are considered poor, good, or great. I just finished testing a Nikon D750 with an 18-70mm lens. I'm ...
- 101
0
votes
2
answers
74
views
Does adding a lens with a higher MTF50 in front of a lens with a lower MTF50 increase the MTF50 of the entire system?
I know that the MTF of an entire imaging system can be modeled by multiplying the MTF of each component (possibly because multiplication in spatial frequency domain is convolution in space?)
So, let'...
- 103
3
votes
2
answers
347
views
How to read and interpret this MTF Table in a Lens Specification?
I have a camera lens specification that shows the following table about the MTF.
I have a few questions about how to read this chart:
What does the On Axis, 30% Field, 60% Field, etc... mean?
What ...
- 233
4
votes
1
answer
504
views
what does RIH mean in an MTF chart
I've read some guides to interpreting an MTF chart, but I can't find any information about the meaning of RIH. My thought an MTF chart would show line/mm curves, so ...
- 155
6
votes
3
answers
2k
views
For MTF, why does 10 represent contrast while 30 represent resolution?
I'm trying to learn to read MTF charts. Everything is making sense to me, except why most explanations of MTF will refer to the 10 l/mm line as a measure of contrast while referring to the 30 l/mm ...
- 3,288
1
vote
1
answer
2k
views
How can I compare MTF50 to a manufacturer's MTF chart?
Currently working with a trial-copy of QuickMTF (Imatest's software kept crashing on me), and I'm trying to get some basic MTF readings for my Canon 85 f/1.8 lens on a 6D. My first set of test shots ...
- 113
1
vote
1
answer
1k
views
How to understand the picture height?
"The Spatial Frequency Response (MTF), shown to twice the Nyquise frequency. The key result is MTF50, the 50% MTF frequency, which corresponds to perceived image sharpness. It is given in cycles per ...
- 131
2
votes
1
answer
607
views
Can a lens's bokeh be predicted by reading an MTF chart?
I've heard people say that everything meaningful about a lens's optical performance can be determined simply by looking at the MTF charts — although nothing is mentioned of that under How do I ...
- 143k
6
votes
5
answers
11k
views
What are my options for an FX wide-angle prime to suit the D800's successor? [closed]
I have a D700 which I'm not planning to replace at this point in Nikon's product cycle. I'll porbably buy the D800's successor. Not because I don't like the D800 (especially its usability ...
- 2,048
2
votes
4
answers
1k
views
How can I compare the MTF results on Photozone from the Pentax SMC DA* 300mm with similar lenses from Canon and Nikon?
I have been researching the Pentax SMC DA* 300mm f/4 ED [IF] SDM as a possible wildlife lens to use with my K-5.
There are only a limited number of reviews of the lens from reputable sources and even ...
- 55
8
votes
1
answer
2k
views
What does "distortion <XX%" mean in lens specs?
I'm going to buy a lens and I would like to understand what "distortion <XX%" means.
It's a vari-focal 10-60mm lens, and mentions distortion <12-1%. ...
- 143
2
votes
1
answer
557
views
Is the BxU measure of lens resolution still used by anyone?
The background
In 2004 DxO released DxO Analyzer. It pioneered a new measure of lens resolution that it called BxU or Blur Experience Unit. Luminous Landscape reported on it (DxO Explained) and ...
- 8,287
38
votes
4
answers
4k
views
How do I interpret an MTF Chart?
As part of how Canon (and other lens makers) give technical information about their lenses, they supply an MTF (Modulation Transfer Function) chart. How do I read and interpret what the chart is ...
- 18.7k
Hot Network Questions
- Find locations (cell's centroid) of a raster's min and max value using R and terra
- Possibility of anachronistic fossils due to time travel
- I have been asked to be on a tenure evaluation committee during my sabbatical, how should I respond?
- Displaying Win+P options on two screens
- Incompatibility between beamer and pdfrender packages?
- What does "Googs" really mean?
- Fantasy novel involving mythical creatures on a farm and two children staying with a relative for the summer
- Interaction term switching sign of main effect
- Dragging cell values in fixed increments
- What would the effects of a space based laser weapon system capable of tracking and destroying any projectile posing a threat to human life?
- Can a spaceship hitchhikes on an explosion to escape a gravity well?
- UC3845 Soft start circuitry
- 80% of respondents agreed…
- Why does the US still maintain so many military facilities in Western Europe?
- MOSFETs stabilizing current in coils keeps burning, how to protect them?
- What was the first work that used an earworm as a defense against a mental attack or probe?
- How to consistently Shake and Sicken enemies as a caster?
- Is there a way to make text feel like an unhinged rant while still being readable?
- Find a simple proof that π is irrational
- How much steel could be recovered from cities a few hundred years after a nuclear apocalypse?
- What procedures are in place in the US for when multiple people in the line of succession are in the same place at the same time?
- tikz trees: how to move a child node of a tree to the top level?
- Monopole antenna with coil design
- What is this IC on the PCB? Top marking H09