Chinese Lenses

The ED lense market will soon be invaded.

Yes.High quality ED. This is the case with the celesctron and Orion but
things will get better.

Won Phat Fuc wrote:
Yes.High quality ED. This is the case with the celesctron and Orion
but
things will get better.

You have a fantastic name!
Henrietta

"I. Schott-Sherive" wrote in message
news:bnxOd.31648$tU6.22968@edtnps91...
The ED lense market will soon be invaded.


From lurking a bit I've learned that sometimes it's hard
to determine what is tounge and cheek.

I do wonder what effect the computerized polishing
machines are having on optics. Are they being used
to produce non-spherical surfaces and how good are
they?

thanks,
Rockett Crawford

http://web2.airmail.net/capella

Computerized polishing machines aren't needed for quality ED objectives.
The Chinese have plenty of people who can stand at a machine all day for
$5 pay. All they need is a steady supply of glass blanks from another
Chinese factory.

Rockett Crawford wrote:
"I. Schott-Sherive" wrote in message
news:bnxOd.31648$tU6.22968@edtnps91...

The ED lense market will soon be invaded.



From lurking a bit I've learned that sometimes it's hard
to determine what is tounge and cheek.

I do wonder what effect the computerized polishing
machines are having on optics. Are they being used
to produce non-spherical surfaces and how good are
they?

thanks,
Rockett Crawford

http://web2.airmail.net/capella

Beats endless ranks of yuppie functionaries do nothing all day but talking
gossip and personal business on the phone at $40-80k per year on State
and Federal budgets whiole working people starve and go homeless?

Tim Killian wrote:

Computerized polishing machines aren't needed for quality ED objectives.
The Chinese have plenty of people who can stand at a machine all day for
$5 pay. All they need is a steady supply of glass blanks from another
Chinese factory.

Rockett Crawford wrote:
"I. Schott-Sherive" wrote in message
news:bnxOd.31648$tU6.22968@edtnps91...

The ED lense market will soon be invaded.



From lurking a bit I've learned that sometimes it's hard
to determine what is tounge and cheek.

I do wonder what effect the computerized polishing
machines are having on optics. Are they being used
to produce non-spherical surfaces and how good are
they?

thanks,
Rockett Crawford

http://web2.airmail.net/capella

Recently I have been doing a bit of export from china, Out of curiosity
because I have been wondering about this for some time now, I did a bit of
research on Chinese manufactures that make lenses (achromat, ED and APO) for
telescopes and whole telescopes as well. First let me say I have no
intention of going into this product but since I was looking at other
products, and I had found out a bit and I had a college over in the right
region and the opportunity came up for him to do a factory tour, now please
flame me all you what but this is a little sample of what I found out and
what my friend seen with his own eyes, I am not interested in entering into
a flame war over this.

What I found out would make people who knock Chinese telescopes hair stand
up on the back of their necks. It comes down to what quality do you want,
One company my college did visit, one of the over a dozen companies that we
found factories that do make APO lens sets. This factory sometimes makes
APO Lens sets for three very known telescope brands when their own
production is behind a bit. Vixen and Tak are two, the third I will not
name as I am unsure if that was just a company rep stretching truth just a
bit too much, but I do not have any reason to doubt what he said, but My
associate seen with his own eyes lens sets packed ready for shipment to the
two named companies (They where 127mm lens sets that where going to Tak and
80mm going to Vixen).


Some of the products on offer are staggering, like one firm offered achromat
telescopes from 40mm up too 20 inch's,minimum order for the 20 inch is 5
and minium focal ratio is f/5, and all in an order must be to the same specs
i.e.,focal length and the options on coating types (coatings done by a
affiliate company) wave front error, tube options focuser options (focusers
are from several deferent companies in china) etc etc the options you may
choose is staggering.

Don't knock the Chinese lenses, in your top brand APO telescope, (AP not
included) you many just have lenses that where made in china, even though
the rest of the telescope was made and the telescope is marked as being made
in Japan, Russia, USA etc.

I do not know about other countries but here in Australia if an item is
assembled and if certain amount of the product components where made here
then it can be marked "Made in Australia" and you do not have declare what
part or any part that are not from Australia. I know most other countries
have simular laws, well the countries I have done business in for other
firms or myself in the past do, i.e. France, Cambodia, Germany, UK, USA,
Hong Kong, Japan, Indonesia, Canada just too name a few.
..

Phil

"I. Schott-Sherive" wrote in message
news:bnxOd.31648$tU6.22968@edtnps91...
The ED lense market will soon be invaded.

Thank you for confirming what many have suspected all along. The lure of
China is so strong now that it's hard to imagine any company offering
consumer products that _isn't_ sourcing parts there. Here in the U.S.,
any product that contains over 50% (by value) domestic parts is "Made in
America". My brother is a union guy and big fan of GM vehicles (go
figure), and he's fanatic about buying only American-made replacement
parts. last year his pick-em-up truck was in a recall for a faulty tail
gate support, so he dutifully took it to the Chevy dealer for the fix.
They replaced two steel cables with corrosion-resistant parts made in
some Chinese factory, and he was so angry about it, he wrote a complaint
letter to the CEO of GM!

But the Chinese government is setting themselves up for a fall IMO. They
have lured tens of millions of rural workers into these factory jobs,
and a large fraction of the armed forces are similarly employed as
production workers to meet the booming demands of export trade. The
resulting growth in their economy has been phenomenal, but it is in no
way sustainable. When the demand for these products ebbs due to a
recession in the U.S., or if the Chinese hit a brick wall from energy or
resource limitations, there will be many millions of suddenly-unemployed
workers with no "safety net" to brake their economic plight. It could be
very ugly as authoritarian governments tend to deal with unrest and
demonstrations very harshly.

Phil wrote:

Recently I have been doing a bit of export from china, Out of curiosity
because I have been wondering about this for some time now, I did a bit of
research on Chinese manufactures that make lenses (achromat, ED and APO) for
telescopes and whole telescopes as well. First let me say I have no
intention of going into this product but since I was looking at other
products, and I had found out a bit and I had a college over in the right
region and the opportunity came up for him to do a factory tour, now please
flame me all you what but this is a little sample of what I found out and
what my friend seen with his own eyes, I am not interested in entering into
a flame war over this.

What I found out would make people who knock Chinese telescopes hair stand
up on the back of their necks. It comes down to what quality do you want,
One company my college did visit, one of the over a dozen companies that we
found factories that do make APO lens sets. This factory sometimes makes
APO Lens sets for three very known telescope brands when their own
production is behind a bit. Vixen and Tak are two, the third I will not
name as I am unsure if that was just a company rep stretching truth just a
bit too much, but I do not have any reason to doubt what he said, but My
associate seen with his own eyes lens sets packed ready for shipment to the
two named companies (They where 127mm lens sets that where going to Tak and
80mm going to Vixen).


Some of the products on offer are staggering, like one firm offered achromat
telescopes from 40mm up too 20 inch's,minimum order for the 20 inch is 5
and minium focal ratio is f/5, and all in an order must be to the same specs
i.e.,focal length and the options on coating types (coatings done by a
affiliate company) wave front error, tube options focuser options (focusers
are from several deferent companies in china) etc etc the options you may
choose is staggering.

Don't knock the Chinese lenses, in your top brand APO telescope, (AP not
included) you many just have lenses that where made in china, even though
the rest of the telescope was made and the telescope is marked as being made
in Japan, Russia, USA etc.

I do not know about other countries but here in Australia if an item is
assembled and if certain amount of the product components where made here
then it can be marked "Made in Australia" and you do not have declare what
part or any part that are not from Australia. I know most other countries
have simular laws, well the countries I have done business in for other
firms or myself in the past do, i.e. France, Cambodia, Germany, UK, USA,
Hong Kong, Japan, Indonesia, Canada just too name a few.
.

Phil

"I. Schott-Sherive" wrote in message
news:bnxOd.31648$tU6.22968@edtnps91...

The ED lense market will soon be invaded.

On Sat, 12 Feb 2005 07:25:01 GMT, "Phil" wrote:

Recently I have been doing a bit of export from china, Out of curiosity
because I have been wondering about this for some time now, I did a bit of
research on Chinese manufactures that make lenses (achromat, ED and APO) for
telescopes and whole telescopes as well. First let me say I have no
intention of going into this product but since I was looking at other
products, and I had found out a bit and I had a college over in the right
region and the opportunity came up for him to do a factory tour, now please
flame me all you what but this is a little sample of what I found out and
what my friend seen with his own eyes, I am not interested in entering into
a flame war over this.

What I found out would make people who knock Chinese telescopes hair stand
up on the back of their necks. It comes down to what quality do you want,
One company my college did visit, one of the over a dozen companies that we
found factories that do make APO lens sets. This factory sometimes makes
APO Lens sets for three very known telescope brands when their own
production is behind a bit. Vixen and Tak are two, the third I will not
name as I am unsure if that was just a company rep stretching truth just a
bit too much, but I do not have any reason to doubt what he said, but My
associate seen with his own eyes lens sets packed ready for shipment to the
two named companies (They where 127mm lens sets that where going to Tak and
80mm going to Vixen).

Explains the variations in quality we've seen from Vixen and Tak.
You could have named the third and just said that it's possible it
isn't accurate.

Some of the products on offer are staggering, like one firm offered achromat
telescopes from 40mm up too 20 inch's,minimum order for the 20 inch is 5
and minium focal ratio is f/5, and all in an order must be to the same specs
i.e.,focal length and the options on coating types (coatings done by a
affiliate company) wave front error, tube options focuser options (focusers
are from several deferent companies in china) etc etc the options you may
choose is staggering.

20" f5? Colour, COLOUR!!!!

You are correct in your assessment of the current situation.

You will not believe what the price of APO refractors will be in just a
few years from now.

And the quality will as good or better than what is available today.

TMT