Sorry guys, but it's probably not a glass prism

Started Sep 5, 2007 | Discussions thread
dkloi Senior Member • Posts: 1,952
Re: LoL

"A new pentaprism system with internal anti-reflective coating
provides a large, bright image that aids positive, accurate manual
focusing."

[SNIP]

Just tell me how a glass prism can have an internal anti-reflective
coating. I have always been under the impression the prism would be
solid, glass. It's just this one technical phrase which bothers me
because I know how imprecise or misleading Sony descriptions can be
when they want them to be.

I would interpret it as the "pentaprism system" which has the internal anti-refelctive coating, not the "pentaprism". Considering they make a clear distinction in the comparison between the A100 and A700, I would take this as simply an ambiguous statement, rather than indicating a mirror box.

AR coats would be applied to the face of the prism adjacent to the viewscreen, and the exit face where the magnifying optics and metering cells are located.

Cheers,
Daniel.

 dkloi's gear list:dkloi's gear list
Sony RX100 II Konica Minolta Maxxum 7D Sony a5100 Sony a7 III Sony E 16mm F2.8 Pancake +22 more
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