[Leica] KolariVision Astro-photography cover glass, Sony a7r, Leica glass

[Paul Roark]

I had the older Sony converted and have posted the first comparison shot on
page 2 of my PDF on this project.  See
http://www.paulroark.com/BW-Info/KolariVision-Astro-BW.pdf

"Tech Pan's" extended red sensitivity comes to digital, including color.

The Astro filter is thinner than the OEM filter.  Leica M wides work quite
well at f/8, but still have a bit of un-sharpness wider.

The WATE plus the astro filter may be quite a landscape combo.

The astro cover glass is very incompatible with the Zeiss Loxia 21mm made
for the Sony.  The advantages of optics designed for the specific cover
glass characteristics are obvious, and not much glass is, in my view,
likely to be made any other way going forward.

The thinness of the astro cover glass was a surprise.  It shot down my hope
of using the Loxia and it's very good f/2.8.  However, with the WATE (and
other Leica glass at f/8) the old Sony may be very interesting.

(I'll probably post this on the Yahoo Digital B&W print forum also.)

Paul
www.PaulRoark.com