Diaphragm Stars and Printing

[Andy Finney <andy@xxxxxxxxxxxxxxxx>]

Hi,

The weather in the UK is rather sunny of late: all I'm waiting for 
are some leaves on the trees!

Andrew Davidhazy pointed out that "the anti-reflection coating is on 
the surfaces of the lenses and not on diaphragm or shutter blades".

I don't think I was getting confused. I think this may differ from 
camera to camera since I had a Minolta SRT-101 where the manual 
referred to an anti-reflective coating on the iris blades in their 
Rokor lenses. It didn't seem to work though since I could get great 
stars at f22 :=) Of course this could just have been bog-standard 
anodising (?) given a marketing spin in 1960s Japan.

Presumably any coating that affected the edges of the iris diaphragm 
would also affect edge diffraction effects? Or am I too long away 
from high-school optics?

On another topic.

I asked my lab (Downtown Darkroom near Waterloo in London) to do some 
test show prints for me from some of my Kodak IR shots. They did an 
absolutely amazing job. They also do lith prints (and some toning) so 
I've asked them to do a lith of one of the shots as a test. Since I 
am starting to get serious requests for prints from visitors I wanted 
a reliable lab. Downtown do Anton Corbijn's prints and they did the 
B&W prints for Lord Snowden's current show at the National Portrait 
Gallery. They only do B&W to my knowledge.

I guess I just thought they deserved a plug. I've mentioned already 
that they D&P my films to contact sheets (they do oversized contacts 
as well) and seem to really know how to handle the stock.

Call them on +44 020 7620 0911 if you're down our way and looking for 
a good lab.
Currently they charge 9 pounds for develop and contact and 24 pounds 
for a print on 16 by 12 archival fibre paper - Ilford I believe.

If you are really into size then they print up to 60 by 40 (costs 180 
pounds) but I think you might see HIE's grain by then. (Prices don't 
include VAT and sizes are in inches.)

Incodentally. Sad that 'War of Our Fathers' is being remaindered. 
It's a fantastic book and I heartily recommend it as well. It cost me 
much more than $1 by mail from the US so maybe this is cognitive 
dissonance at work ;-)

... and that was a word from our sponsor, now back to the programme.

Andy
Invisible Light - www.atsf.co.uk/ilight
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