Anastigmat in a sentence as a noun

I suspect that the chromatic and anastigmatic aberration that are characteristic of a Holga are a result of a single element meniscus lens, which is well known for having these problems. I've heard that the lens is also made out of plastic, which transmits lights differently from glass.

Anastigmat definitions

noun

compound lens or lens system designed to be free of astigmatism and able to form approximately point images