Dangerous thoughts about glass, and a couple of questions

Keith Whaley keith_w at dslextreme.com
Sun Oct 11 18:06:07 EDT 2009

Larry Colen wrote:
> On Sun, Oct 11, 2009 at 03:18:45PM -0400, Miserere wrote:
>> 2009/10/11 Larry Colen <lrc at red4est.com>:
>> [snip]

>>> Question 1: What is it that is different about the 77 that makes it
>>> such an amazing lens for shooting portraits?

>> From what I've gathered reading a number of secret internal memos and
>> looking at the original optical diagrams...what makes the 77 Ltd so
>> special is Japanese pixie dust.
>> I think they ran out of it a few years ago, so I don't think they were
>> able to use it for the DA* 55.

> I'm sorry. Again I apologize for stating things unclearly. It's
> something that I was thinking about on my drive home from dancing,

Oh, please, lr... is that somehow pertinent?

> ...and I didn't get enough sleep (or any actually) before posting.
> I'm not so concerned with the mechanism of how it's done. I'm not
> planning on making any lenses for my pentax from scratch. I was
> curious about which quality in particular, or if you prefer, aspect of
> its personality: contrast, bokeh, whatever.
> I'm also curious whether the 55/1.4 shares this personality trait, or
> if it's more like the 50 or the 31.
>     lrc


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