[Brightcolours]

You will not be able to measure images you take without software, which knows the chart you use. If you use freely available software, you can't compare results with Optical Limits MTF results for so many reasons that I don't feel like listing them all.

But you can compare this lens with other lenses you have (/access to).

A cost free (open source) MTF software collection is called MTF mapper:
https://sourceforge.net/p/mtfmapper/home/Home/
https://sourceforge.net/projects/mtfmapper/