Ebay 30mm/80deg / 2" eyepiece

Thaks for the info. As I read more about it, seems it works well with higher
f/ ratio telescopes, down to f/6. It gets very mushi at the edge at f/4.5.
This is where the Naglers shine, in large DOBs.

Julius

"Dennis Woos" wrote in message
...
"Szaki" wrote in message
news:KZ_Mb.48511$xy6.117505@attbi_s02...
So, you mean the edge is not as sharp as the UO's? Maybe, the quality
not
as
consistant than other, more expensie brands, that's why it's cheap.

Julius


That isn't what I mean. Mine is as sharp and bright as the Kong up to the
point where the fov exceeds the fov of the Konig, and then it gets pretty
bad. Also, I have looked through a couple of them, and I have no reason
to
believe that they are not of consistent quality. There is a long story
about why it is so cheap - do a google search, and look at the 1rpd
website.

Dennis

Thaks for the info. As I read more about it, seems it works well with higher
f/ ratio telescopes, down to f/6. It gets very mushi at the edge at f/4.5.
This is where the Naglers shine, in large DOBs.

Julius

"Dennis Woos" wrote in message
...
"Szaki" wrote in message
news:KZ_Mb.48511$xy6.117505@attbi_s02...
So, you mean the edge is not as sharp as the UO's? Maybe, the quality
not
as
consistant than other, more expensie brands, that's why it's cheap.

Julius


That isn't what I mean. Mine is as sharp and bright as the Kong up to the
point where the fov exceeds the fov of the Konig, and then it gets pretty
bad. Also, I have looked through a couple of them, and I have no reason
to
believe that they are not of consistent quality. There is a long story
about why it is so cheap - do a google search, and look at the 1rpd
website.

Dennis

Thaks for the info. As I read more about it, seems it works well with higher
f/ ratio telescopes, down to f/6. It gets very mushi at the edge at f/4.5.
This is where the Naglers shine, in large DOBs.

Julius

"Dennis Woos" wrote in message
...
"Szaki" wrote in message
news:KZ_Mb.48511$xy6.117505@attbi_s02...
So, you mean the edge is not as sharp as the UO's? Maybe, the quality
not
as
consistant than other, more expensie brands, that's why it's cheap.

Julius


That isn't what I mean. Mine is as sharp and bright as the Kong up to the
point where the fov exceeds the fov of the Konig, and then it gets pretty
bad. Also, I have looked through a couple of them, and I have no reason
to
believe that they are not of consistent quality. There is a long story
about why it is so cheap - do a google search, and look at the 1rpd
website.

Dennis

On Wed, 14 Jan 2004 01:52:56 GMT, "Szaki" wrote:

Thaks for the info. As I read more about it, seems it works well with higher
f/ ratio telescopes, down to f/6. It gets very mushi at the edge at f/4.5.
This is where the Naglers shine, in large DOBs.

Julius

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

You are learning. Not all eyepieces work well in all scopes. Naglers
are designed to perform in fast scopes.Also you need to know that just
because the apparnet field of view is real wide does not necessarily
make it a great eyepiece. Filed of view is but only one parameter of
many. It does no good to have 80 plus degree field of view if that the
outer half of the field of view the stars look like color blobs or
suffer severe astigmatism.

From what I have read about the eyepiece, it is an Erfle design, not
sure what configuration (1-2-2 or 2-1-2), and I really question how
well is performs to 80 degrees. To 70 degrees is about the limit where
Erfles should be limited to. The only way to get wider field is to
sacrifice some other criteria such as eye relief or distortion. A 41
mm fieldstop on a 30 mm focal length eyepiece to me seems a bit wide.
I would expect something more along 35mm filed stop. Besides in scopes
faster than F5 the performance degrades more. F6 an slower are better
for this design.

james



"Dennis Woos" wrote in message
...
"Szaki" wrote in message
news:KZ_Mb.48511$xy6.117505@attbi_s02...
So, you mean the edge is not as sharp as the UO's? Maybe, the quality
not
as
consistant than other, more expensie brands, that's why it's cheap.

Julius


That isn't what I mean. Mine is as sharp and bright as the Kong up to the
point where the fov exceeds the fov of the Konig, and then it gets pretty
bad. Also, I have looked through a couple of them, and I have no reason
to
believe that they are not of consistent quality. There is a long story
about why it is so cheap - do a google search, and look at the 1rpd
website.

Dennis

On Wed, 14 Jan 2004 01:52:56 GMT, "Szaki" wrote:

Thaks for the info. As I read more about it, seems it works well with higher
f/ ratio telescopes, down to f/6. It gets very mushi at the edge at f/4.5.
This is where the Naglers shine, in large DOBs.

Julius

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

You are learning. Not all eyepieces work well in all scopes. Naglers
are designed to perform in fast scopes.Also you need to know that just
because the apparnet field of view is real wide does not necessarily
make it a great eyepiece. Filed of view is but only one parameter of
many. It does no good to have 80 plus degree field of view if that the
outer half of the field of view the stars look like color blobs or
suffer severe astigmatism.

From what I have read about the eyepiece, it is an Erfle design, not
sure what configuration (1-2-2 or 2-1-2), and I really question how
well is performs to 80 degrees. To 70 degrees is about the limit where
Erfles should be limited to. The only way to get wider field is to
sacrifice some other criteria such as eye relief or distortion. A 41
mm fieldstop on a 30 mm focal length eyepiece to me seems a bit wide.
I would expect something more along 35mm filed stop. Besides in scopes
faster than F5 the performance degrades more. F6 an slower are better
for this design.

james



"Dennis Woos" wrote in message
...
"Szaki" wrote in message
news:KZ_Mb.48511$xy6.117505@attbi_s02...
So, you mean the edge is not as sharp as the UO's? Maybe, the quality
not
as
consistant than other, more expensie brands, that's why it's cheap.

Julius


That isn't what I mean. Mine is as sharp and bright as the Kong up to the
point where the fov exceeds the fov of the Konig, and then it gets pretty
bad. Also, I have looked through a couple of them, and I have no reason
to
believe that they are not of consistent quality. There is a long story
about why it is so cheap - do a google search, and look at the 1rpd
website.

Dennis

On Wed, 14 Jan 2004 01:52:56 GMT, "Szaki" wrote:

Thaks for the info. As I read more about it, seems it works well with higher
f/ ratio telescopes, down to f/6. It gets very mushi at the edge at f/4.5.
This is where the Naglers shine, in large DOBs.

Julius

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

You are learning. Not all eyepieces work well in all scopes. Naglers
are designed to perform in fast scopes.Also you need to know that just
because the apparnet field of view is real wide does not necessarily
make it a great eyepiece. Filed of view is but only one parameter of
many. It does no good to have 80 plus degree field of view if that the
outer half of the field of view the stars look like color blobs or
suffer severe astigmatism.

From what I have read about the eyepiece, it is an Erfle design, not
sure what configuration (1-2-2 or 2-1-2), and I really question how
well is performs to 80 degrees. To 70 degrees is about the limit where
Erfles should be limited to. The only way to get wider field is to
sacrifice some other criteria such as eye relief or distortion. A 41
mm fieldstop on a 30 mm focal length eyepiece to me seems a bit wide.
I would expect something more along 35mm filed stop. Besides in scopes
faster than F5 the performance degrades more. F6 an slower are better
for this design.

james



"Dennis Woos" wrote in message
...
"Szaki" wrote in message
news:KZ_Mb.48511$xy6.117505@attbi_s02...
So, you mean the edge is not as sharp as the UO's? Maybe, the quality
not
as
consistant than other, more expensie brands, that's why it's cheap.

Julius


That isn't what I mean. Mine is as sharp and bright as the Kong up to the
point where the fov exceeds the fov of the Konig, and then it gets pretty
bad. Also, I have looked through a couple of them, and I have no reason
to
believe that they are not of consistent quality. There is a long story
about why it is so cheap - do a google search, and look at the 1rpd
website.

Dennis

On Wed, 14 Jan 2004 01:52:56 GMT, "Szaki" wrote:

Thaks for the info. As I read more about it, seems it works well with higher
f/ ratio telescopes, down to f/6. It gets very mushi at the edge at f/4.5.
This is where the Naglers shine, in large DOBs.

Julius

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

You are learning. Not all eyepieces work well in all scopes. Naglers
are designed to perform in fast scopes.Also you need to know that just
because the apparnet field of view is real wide does not necessarily
make it a great eyepiece. Filed of view is but only one parameter of
many. It does no good to have 80 plus degree field of view if that the
outer half of the field of view the stars look like color blobs or
suffer severe astigmatism.

From what I have read about the eyepiece, it is an Erfle design, not
sure what configuration (1-2-2 or 2-1-2), and I really question how
well is performs to 80 degrees. To 70 degrees is about the limit where
Erfles should be limited to. The only way to get wider field is to
sacrifice some other criteria such as eye relief or distortion. A 41
mm fieldstop on a 30 mm focal length eyepiece to me seems a bit wide.
I would expect something more along 35mm filed stop. Besides in scopes
faster than F5 the performance degrades more. F6 an slower are better
for this design.

james



"Dennis Woos" wrote in message
...
"Szaki" wrote in message
news:KZ_Mb.48511$xy6.117505@attbi_s02...
So, you mean the edge is not as sharp as the UO's? Maybe, the quality
not
as
consistant than other, more expensie brands, that's why it's cheap.

Julius


That isn't what I mean. Mine is as sharp and bright as the Kong up to the
point where the fov exceeds the fov of the Konig, and then it gets pretty
bad. Also, I have looked through a couple of them, and I have no reason
to
believe that they are not of consistent quality. There is a long story
about why it is so cheap - do a google search, and look at the 1rpd
website.

Dennis

"Szaki" wrote in message
news:yy_Mb.48266$xy6.116194@attbi_s02...
Any one try this 2" 30mm eyepiece, selling on ebay, for $95? It has 80 deg
field.

http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=29 954
Item number: 2979229461

Any good, seems very cheap?

Julius




one can buy the same eyepiece from Astrobuffet for $75 in its cheapest
incarnation (I believe no bolt case and maybe slight blems ) . Or a very
similar one (but not identical) brand new from Apogee , the Widescan 32mm ,
2" , 70deg FOV for something like $69 .

Best Regards,
Matt Tudor

"Szaki" wrote in message
news:yy_Mb.48266$xy6.116194@attbi_s02...
Any one try this 2" 30mm eyepiece, selling on ebay, for $95? It has 80 deg
field.

http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=29 954
Item number: 2979229461

Any good, seems very cheap?

Julius




one can buy the same eyepiece from Astrobuffet for $75 in its cheapest
incarnation (I believe no bolt case and maybe slight blems ) . Or a very
similar one (but not identical) brand new from Apogee , the Widescan 32mm ,
2" , 70deg FOV for something like $69 .

Best Regards,
Matt Tudor

"Szaki" wrote in message
news:yy_Mb.48266$xy6.116194@attbi_s02...
Any one try this 2" 30mm eyepiece, selling on ebay, for $95? It has 80 deg
field.

http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=29 954
Item number: 2979229461

Any good, seems very cheap?

Julius




one can buy the same eyepiece from Astrobuffet for $75 in its cheapest
incarnation (I believe no bolt case and maybe slight blems ) . Or a very
similar one (but not identical) brand new from Apogee , the Widescan 32mm ,
2" , 70deg FOV for something like $69 .

Best Regards,
Matt Tudor