EP with low lateral color (20-40mm, 65-70º AFOV)?

I'm looking for an eyepiece or series that has low lateral color (this is
for a f/6.3 Tele Vue 76, which is an APO - Petzval design).

As an example of what I mean, I find the lateral color in the Panoptic 24mm
and Pentax XW 40mm bothersome. In the center of the field it's fine (no
longitudinal color), but the lateral color steadily increases going out
towards the edge of the field. This is most noticeable during the daytime
when viewing light and dark objects next to each other - white birds, dark
tree branches against the sky, sailboats, etc. - all of which have blue/red
fringing.

I'd like to have about the same AFOV as the Panoptics or Pentax XL/XWs
(65-70º).

I've considered looking into Leica Televid or Zeiss Diascope's spotting
scope eyepieces - they have the AFOV I want, although nothing larger than
about 22mm.

Any comments on the Leica / Zeiss eyepieces when used with a telescope?

Other low lateral color EP ideas?

I'm looking for an eyepiece or series that has low lateral color (this is
for a f/6.3 Tele Vue 76, which is an APO - Petzval design).


The TV 76 is not a Petzval.

RC

I'm looking for an eyepiece or series that has low lateral color (this is
for a f/6.3 Tele Vue 76, which is an APO - Petzval design).


The TV 76 is not a Petzval.

RC

"Alen MacT" wrote in message news:CFgVb.25402$1O.4618@fed1read05...
I'm looking for an eyepiece or series that has low lateral color (this is
for a f/6.3 Tele Vue 76, which is an APO - Petzval design).

As an example of what I mean, I find the lateral color in the Panoptic 24mm
and Pentax XW 40mm bothersome. In the center of the field it's fine (no
longitudinal color), but the lateral color steadily increases going out
towards the edge of the field. This is most noticeable during the daytime
when viewing light and dark objects next to each other - white birds, dark
tree branches against the sky, sailboats, etc. - all of which have blue/red
fringing.

I'd like to have about the same AFOV as the Panoptics or Pentax XL/XWs
(65-70º).

I've considered looking into Leica Televid or Zeiss Diascope's spotting
scope eyepieces - they have the AFOV I want, although nothing larger than
about 22mm.

Any comments on the Leica / Zeiss eyepieces when used with a telescope?

Other low lateral color EP ideas?

Try the Speers Waler eyepieces. In addition to low lateral colour (relative
to other WF eyepieces) they also have very low distortion, another problem
that plagues other WF eyepieces. FOV are about 80 deg.
-Rich

"Alen MacT" wrote in message news:CFgVb.25402$1O.4618@fed1read05...
I'm looking for an eyepiece or series that has low lateral color (this is
for a f/6.3 Tele Vue 76, which is an APO - Petzval design).

As an example of what I mean, I find the lateral color in the Panoptic 24mm
and Pentax XW 40mm bothersome. In the center of the field it's fine (no
longitudinal color), but the lateral color steadily increases going out
towards the edge of the field. This is most noticeable during the daytime
when viewing light and dark objects next to each other - white birds, dark
tree branches against the sky, sailboats, etc. - all of which have blue/red
fringing.

I'd like to have about the same AFOV as the Panoptics or Pentax XL/XWs
(65-70º).

I've considered looking into Leica Televid or Zeiss Diascope's spotting
scope eyepieces - they have the AFOV I want, although nothing larger than
about 22mm.

Any comments on the Leica / Zeiss eyepieces when used with a telescope?

Other low lateral color EP ideas?

Try the Speers Waler eyepieces. In addition to low lateral colour (relative
to other WF eyepieces) they also have very low distortion, another problem
that plagues other WF eyepieces. FOV are about 80 deg.
-Rich

"Richard" wrote in message
Try the Speers Waler eyepieces. In addition to low lateral colour
(relative
to other WF eyepieces) they also have very low distortion, another problem
that plagues other WF eyepieces. FOV are about 80 deg.
-Rich

Rich,

And do round objects look round at the edge of the field?

Clear skies, Alan

"Richard" wrote in message
Try the Speers Waler eyepieces. In addition to low lateral colour
(relative
to other WF eyepieces) they also have very low distortion, another problem
that plagues other WF eyepieces. FOV are about 80 deg.
-Rich

Rich,

And do round objects look round at the edge of the field?

Clear skies, Alan

"Chris1011" wrote in message
...
I'm looking for an eyepiece or series that has low lateral color (this
is
for a f/6.3 Tele Vue 76, which is an APO - Petzval design).


The TV 76 is not a Petzval.

RC

You're right, it's an apochromat doublet - thanks for bring it to my
attention.

"Chris1011" wrote in message
...
I'm looking for an eyepiece or series that has low lateral color (this
is
for a f/6.3 Tele Vue 76, which is an APO - Petzval design).


The TV 76 is not a Petzval.

RC

You're right, it's an apochromat doublet - thanks for bring it to my
attention.

...lateral color in the Panoptic 24mm and Pentax XW 40mm bothersome.

Sorry, the 40mm is my typo - I meant a Pentax XW 30mm (had a Pentax XL 40
I'm waiting for on my mind when I wrote the original post).