Why is Window Glass So Bad to Shoot Through?

Started 3 months ago | Questions thread
Doug Haag Senior Member • Posts: 2,341
Re: Why is Window Glass So Bad to Shoot Through?

Clickalot wrote:

I guess it's a lesson in why optical glass costs buckets of dough, but I've learned that even freshly cleaned, streak-free window glass destroys fine detail and creates haze in pix taken through it no matter how scrupulously one chooses outdoor light conditions that obviate room/clothing reflections.

It's probably got to to with molecules and crystalline structure and stuff, no?

Glass is a strange material in that even when cooled from its molten state to a solid it does not have a crystalline structure.  Although not a perfect analogy, think of it as a liquid that, at room temperature, has become so viscous that it seems rigid.  The reason this is not a perfect analogy is that it would appear to explain why some centuries old windows are thicker at the bottom than at the top -- the "liquid" having slumped over time.  But that is not the explanation for that phenomenon which can be Googled.

Anyway  https://www.google.com/search?client=firefox-b-d&sxsrf=ALeKk02EBerKbgFkDVPtThZWpgAagp98wQ%3A1603195959471&source=hp&ei=N9SOX42uGtGktQb88btA&q=does+glass+have+a+crystalline+structure&oq=does+glass+have&gs_lcp=CgZwc3ktYWIQARgAMgUIABDJAzICCAAyAggAMgIIADICCAAyAggAMgIIADICCAAyAggAMgIIADoECCMQJzoICC4QsQMQgwE6CAgAELEDEIMBOgsILhCxAxDHARCjAjoFCAAQsQM6CAgAELEDEMkDUOsOWJE_YNZWaABwAHgAgAFsiAHzCZIBBDE0LjGYAQCgAQGqAQdnd3Mtd2l6&sclient=psy-ab

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