Below are links to six printable targets. All are sized for 16-inch (410 mm) stars. All are binary (not sinusoidal). There are three stars for Epson printers, which want 360 ppi input images, and three for Canon printers, which take 300 pi images. To download a file, right-click on the link below, then choose “Save as…”.
Don’t downsize these targets before printing them. Send them to your printer driver at 360 ppi in the case of the Epson files, or 300 ppi for the Canon ones. If you want to print on smaller paper, crop the targets, but print at 360 or 300 ppi. If you want bigger targets, let me know how big, and I’ll create some and post them here.
s.jpg "Lens")
These are monochromatic files. When you open them in Photoshop, you’ll see something like this:
(The Imatest Log Frequency chart, which can be created by Imatest Test Charts, is a more recent update which omits the scales because spatial frequencies are automatically detected by Imatest.) Actually 'lens' test chart is something of a misnomer since it's difficult to test a lens in isolation. You are really testing an imaging system. The first chart type (shown above) provides the 'Average' results for a lens and the second shows the 'Variance' within a lens model. About the MTF Average Testing With grossly decentered or tilted lenses removed from contention, 10 lenses of each model are selected for testing (at wide open aperture). The Angry Photographer: TEST CHART for testing your DSLR & Lenses. Secrets to save you $$.
Since every pixel in the files is either pure black or pure white, it doesn’t matter what grayscale profile you assign. Gray Gamma 2.2 is as good as anything.
Epson
Lens Testing Chart
These are monochromatic files. When you open them in Photoshop, you’ll see something like this:
(The Imatest Log Frequency chart, which can be created by Imatest Test Charts, is a more recent update which omits the scales because spatial frequencies are automatically detected by Imatest.) Actually 'lens' test chart is something of a misnomer since it's difficult to test a lens in isolation. You are really testing an imaging system. The first chart type (shown above) provides the 'Average' results for a lens and the second shows the 'Variance' within a lens model. About the MTF Average Testing With grossly decentered or tilted lenses removed from contention, 10 lenses of each model are selected for testing (at wide open aperture). The Angry Photographer: TEST CHART for testing your DSLR & Lenses. Secrets to save you $$.
Since every pixel in the files is either pure black or pure white, it doesn’t matter what grayscale profile you assign. Gray Gamma 2.2 is as good as anything.
Epson
Lens Testing Chart
Canon
- One way to test your own lenses is with the USAF 1951 lens testing chart. The best way to do this is to download a high resolution file of the chart from the link at the bottom of the page, and print the file out at about 3x3 inches in size on photo paper at your printers highest resolution (with many printers this is 1440 or 1880 ppl).
- During an eye test, eye doctors use eye charts to measure how well you see in the distance, compared with other human beings. If you haven't established one yet, click here to find an eye doctor near you. The classic example of an eye chart is the Snellen eye chart, developed.
Testing Lens Test Chart Download Free
And here’s a really big file (12000×12000 pixels, 200 spokes), for those making a really big target. There’s a fair amount of aliasing towards the center, but that should all be a blur in actual use.
