Well , I have a friend who has created a lens testing chart that is easy to use. I got a copy of this chart to try out, and it really is something great.
The retail cost will be $20 USD, plus US Postal shipping costs. There will be a choice of a flat enforced mailer or a round tube.
Which is a great deal and I found using it very straight forward.
Just put it on the any wall in your house or apartment with indirect light and a tripod. Make sure you camera is square to the chart !
If you have a bubble level on your tripod make sure to use it. So you have a perfectly flat plan of focus. Also this is a fully vectored image test chart in all
areas of test images. Most test charts are only half tone and not sharp to start with....not to mention very expensive.
The chart comes with a full set of instructions base on what type of lens and the brand of lens. Also you should try both auto focus and manual focus shots.
Make sure to also use your on camera flash. This provides are real education for anyone. Lens Test Chart example
Now I am posting a small JPEG of the chart. I used the Prof. Foto chart for testing of "zoom" or "fixed' lenses. It really helps me see where the sweat spot
of each zoom lens is. Also this chart is great for checking the calibration of your internal light meter at any setting from spot to full field. Sweet.
So We will be selling the chart for my friend here on DA. Also you will be able to order it via my "prints" page function, just like any normal print.
Needless to say the chart allows you to also check for any color shifting and look for problem areas related to lens design. So now if you need to get
the hard proof how sharp or bad your lens is this is the quick and sure way to make it happen. your results can be very surprising...good and bad.
Also remember this is a copyrighted and a pending trademark. I will be loading the full size chart in the next 24hrs.