Tessar Coating Question

In article .com,
Dan Fromm wrote:

Sarah Brown wrote:
snip

I've got some lovely results, with good contrast with an uncoated Tessar on
Provia 100F. It's only got 6 air/glass interfaces after all.

Sarah, I'm with you. I've been trying out a couple of f/6.3 B&L IIbs,
one pre-WWI, the other apparently from the '20s. They're not the
sharpest lenses I have in their focal lengths, but they're not bad and
they make very satisfactory EPN transparencies. Flare is not a problem
with them.

I'd say that's fair. Mine is on a pre-war Ikoflex II and while it's no
Xenotar, it's OK. Bit of CA in the corners, not the end of the world. Gives
nice colours.

"Stacey" wrote in message
...

wrote:
I recently got a quote to coat a Tessar - $700 if I'm figuring right.


Talk to the guys at www.arax.com. Lower labor rate, MUCH cheaper at
multicoating old optics and the people who have had them do this sort of
work have been happy.


http://araxfoto.com

--
Regards,
Matt Clara
www.mattclara.com

wrote in message
ups.com...

Are you sure it isn't "Waterhouse stops" because it's got no iris?

Mister Waterhouse is the fellow who patented, or at least introduced the
"stop on a slide" thing.

Etaoin Shurdlu wrote:
wrote in message
ups.com...

Are you sure it isn't "Waterhouse stops" because it's got no iris?

Mister Waterhouse is the fellow who patented, or at least introduced the
"stop on a slide" thing.

I wish I could have gotten away with patenting a hole in a metal plate.
That way, anybody who drills a hole in a metal plate has to pay me
money.

Etaoin Shurdlu wrote:
wrote in message
...
[...] And I don't for one believe Tessars are "turds".

Terssars are strange - kinda-sharp at the edges, sharp in the center, and
the rest is soft.

"turds", in other words.

wrote in message
ups.com...

Etaoin Shurdlu wrote:
wrote in message
...
[...] And I don't for one believe Tessars are "turds".

Terssars are strange - kinda-sharp at the edges, sharp in the center, and
the rest is soft.

"turds", in other words.

What are ya, Dr. Seuss?

I just feel that a person should know what the lens does and use the virtues
it has. Some folks do very well with uncoated lenses; they know where the
light is thrown, how it diminishes contrast, how the sharpness works, and
how to exploit all those characteristics.

There are modern, coated Tessar-design lenses to choose from.

Sarah Brown wrote:

I've got some lovely results, with good contrast with an uncoated Tessar
on
Provia 100F. It's only got 6 air/glass interfaces after all.

Plus one glass-glass interface.
Provided the bits of glass do not have the same index of refraction (which
they do not, else only one piece of glass could have been used), that
glass-glass 'interface' will bounce light off it as well as glass-air
'interface'.

wrote:

Etaoin Shurdlu wrote:

Mister Waterhouse is the fellow who patented, or at least introduced the
"stop on a slide" thing.

I wish I could have gotten away with patenting a hole in a metal plate.
That way, anybody who drills a hole in a metal plate has to pay me
money.

Waterhouse stops sound like a really obvious idea, but when
John Waterhouse introduced them in 1858 they were an innovation.

I don't know if they were patented or not, but anyone who comes
up with a brand new idea which is simple and useful deserves
any wealth and fame they can get out of it.

He certainly got lasting fame.

Peter.
--

"Peter Irwin" wrote in message
...
wrote:

Etaoin Shurdlu wrote:

Mister Waterhouse is the fellow who patented, or at least introduced
the
"stop on a slide" thing.

I wish I could have gotten away with patenting a hole in a metal plate.
That way, anybody who drills a hole in a metal plate has to pay me
money.

Waterhouse stops sound like a really obvious idea, but when
John Waterhouse introduced them in 1858 they were an innovation.

I don't know if they were patented or not, but anyone who comes
up with a brand new idea which is simple and useful deserves
any wealth and fame they can get out of it.

He certainly got lasting fame.



I'm not sure one would call it "fame": if not for frequenting these groups,
I'd never have heard of waterhouse stops. John William Waterhouse, yes,
Price-Waterhouse, yup, but not Waterhouse stops.

--
Regards,
Matt Clara
www.mattclara.com

"Matt Clara" wrote in message
...

http://araxfoto.com

Quote from that site: "The ARAX cameras [...] are the future of the medium
format generation [...]"

Man, that's gotta be some kind of Ruskie mistranslation. I think they
meant, "the niche at the edge of the world for the desperate, destitute and
demoralized"