Hi Andrew:
1 That coatings are not uniform.
2 Variances may be due to supply, advances, changes in type of glass,
perceived market preferences and shifts in taste
I would still like to see qualitative side by side illustrations of the
difference that SC or MC in their variant colours makes. My guess, in most
normal lens applications- not much.
Gord (under 2)
----- Original Message -----
From: "Andrew Fildes"
>
> Now, for those of you who haven't been on the list more than a couple
> of years, here's what it used to look like in the days before OT
> postings! Hold on tight. The classic coating discussion!
>
> I'm sitting looking at four 50/1.8's for various reasons. Now, gullible
> character that I am, I assumed that the green reflection was the test
> of multicoating but I noticed something very odd here.
> The latest 5 million serial MIJ shows NO green - just gold, blue
> (front), magenta.
> A 3.9 mill. MIJ is identical.
> A 2.66 mill. MC has a magenta rather than blue front coating but from
> the rear, it is possible though difficult to pick up one internal green
> surface.
> However, a 2.83 million MC has a green front coating and an internal
> green reflection visible from both ends.
> Neither MC has a blue reflection. Was the blue used to replace the
> green in the MIJ?
> So I checked all the others. 0.8 mill. 50/1.4, no green OR blue while
> the 1.05 mill. does. All the rest some green (although light in the
> 300mm) except for the 16mm and 8mm.
> What does this all mean? :-)
> AndrewF
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