So how are the Chinese Newtonians?

I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

On 7 Jan 2004 16:04:13 -0800, (Richard) wrote:

I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

Just about as you would expect. Go over too Yahoo and check out the
Celestron groups. I know one fellow who had one of the 8" scopes and the
coma was so bad the only way he could deal with it was to place tape in the
corners of his eyes, you know sort of make them slanted, see he figured the
little yellow buggers that made the things were probably looking on the
bias......
Hope that helps!

On 7 Jan 2004 16:04:13 -0800, (Richard) wrote:

I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

Just about as you would expect. Go over too Yahoo and check out the
Celestron groups. I know one fellow who had one of the 8" scopes and the
coma was so bad the only way he could deal with it was to place tape in the
corners of his eyes, you know sort of make them slanted, see he figured the
little yellow buggers that made the things were probably looking on the
bias......
Hope that helps!

On 7 Jan 2004 16:04:13 -0800, (Richard) wrote:

I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

Just about as you would expect. Go over too Yahoo and check out the
Celestron groups. I know one fellow who had one of the 8" scopes and the
coma was so bad the only way he could deal with it was to place tape in the
corners of his eyes, you know sort of make them slanted, see he figured the
little yellow buggers that made the things were probably looking on the
bias......
Hope that helps!

Xemus younger brother wrote:

On 7 Jan 2004 16:04:13 -0800, (Richard) wrote:


I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

Just about as you would expect. Go over too Yahoo and check out the
Celestron groups. I know one fellow who had one of the 8" scopes and the
coma was so bad the only way he could deal with it was to place tape in the
corners of his eyes, you know sort of make them slanted, see he figured the
little yellow buggers that made the things were probably looking on the
bias......
Hope that helps!

This is actually quite a compliment. As you say it, the coma is the
most serious issue with the mirror in question. In other words - it's
a well made mirror, since the rest of the aberations are small. No
matter how you precise you make a mirror, you cannot reduce the coma.

As it happens, my 8" scope is with a Chinese primary. And the mirror
is well made, indeed. Especially for the price.

Regards,

- Alex

Xemus younger brother wrote:

On 7 Jan 2004 16:04:13 -0800, (Richard) wrote:


I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

Just about as you would expect. Go over too Yahoo and check out the
Celestron groups. I know one fellow who had one of the 8" scopes and the
coma was so bad the only way he could deal with it was to place tape in the
corners of his eyes, you know sort of make them slanted, see he figured the
little yellow buggers that made the things were probably looking on the
bias......
Hope that helps!

This is actually quite a compliment. As you say it, the coma is the
most serious issue with the mirror in question. In other words - it's
a well made mirror, since the rest of the aberations are small. No
matter how you precise you make a mirror, you cannot reduce the coma.

As it happens, my 8" scope is with a Chinese primary. And the mirror
is well made, indeed. Especially for the price.

Regards,

- Alex

Xemus younger brother wrote:

On 7 Jan 2004 16:04:13 -0800, (Richard) wrote:


I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

Just about as you would expect. Go over too Yahoo and check out the
Celestron groups. I know one fellow who had one of the 8" scopes and the
coma was so bad the only way he could deal with it was to place tape in the
corners of his eyes, you know sort of make them slanted, see he figured the
little yellow buggers that made the things were probably looking on the
bias......
Hope that helps!

This is actually quite a compliment. As you say it, the coma is the
most serious issue with the mirror in question. In other words - it's
a well made mirror, since the rest of the aberations are small. No
matter how you precise you make a mirror, you cannot reduce the coma.

As it happens, my 8" scope is with a Chinese primary. And the mirror
is well made, indeed. Especially for the price.

Regards,

- Alex

"Richard" wrote in message
m...
I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

Here's what I've seen in my 10" f/4.7 Orion XT10:

http://www.tomhole.com/What%20will%2...ook%20Like.htm

I have since bought an 11" Starmaster with Zambuto optics (you'll see some
thoughts on that at the bottom of the page). The Starmaster is better, but
the Chinese XT10 was very good.

Clear skies,

TOm

"Richard" wrote in message
m...
I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

Here's what I've seen in my 10" f/4.7 Orion XT10:

http://www.tomhole.com/What%20will%2...ook%20Like.htm

I have since bought an 11" Starmaster with Zambuto optics (you'll see some
thoughts on that at the bottom of the page). The Starmaster is better, but
the Chinese XT10 was very good.

Clear skies,

TOm

"Richard" wrote in message
m...
I've had quite a bit of experience with the Chinese refractors,
and most of them perform admirably, especially for the price, but
I'm kind of curious as to how scopes equipped with Chinese primary mirrors
and diagonals are working out?
-Rich

Here's what I've seen in my 10" f/4.7 Orion XT10:

http://www.tomhole.com/What%20will%2...ook%20Like.htm

I have since bought an 11" Starmaster with Zambuto optics (you'll see some
thoughts on that at the bottom of the page). The Starmaster is better, but
the Chinese XT10 was very good.

Clear skies,

TOm