6" Celestron...

Greetings

I bought a 6" f/8 Celestron refractor on Astromart---The false color is
horrible. I remember reading about an inline corrector of some kind---not a
simple $49 filter but a rather expensive item---anyone know about these
things? OR, does anyone want a Celestron 6" for $325 plus shipping!!!!!!?

Doink

Sure Doink, the Chromacorr made by Valery D., of Aries, but do you want
to spend around $500-700 to fix the shortcomings of a refractor worth
$325? Chromatic aberration won't be the only shortcoming with these, so
don't figure on AP performance even with the Chromacorr.
Mark

"Doink" wrote in message
...
Greetings

I bought a 6" f/8 Celestron refractor on Astromart---The false color is
horrible. I remember reading about an inline corrector of some kind---not
a simple $49 filter but a rather expensive item---anyone know about these
things? OR, does anyone want a Celestron 6" for $325 plus shipping!!!!!!?

Doink

I think you are thinking of the "Chromacorr."

Rockett Crawford

How well do they work?


"Mark D" wrote in message
...
Sure Doink, the Chromacorr made by Valery D., of Aries, but do you want
to spend around $500-700 to fix the shortcomings of a refractor worth
$325? Chromatic aberration won't be the only shortcoming with these, so
don't figure on AP performance even with the Chromacorr.
Mark

"Doink" wrote in message
...
How well do they work?


"Mark D" wrote in message
...
Sure Doink, the Chromacorr made by Valery D., of Aries, but do you want
to spend around $500-700 to fix the shortcomings of a refractor worth
$325? Chromatic aberration won't be the only shortcoming with these, so
don't figure on AP performance even with the Chromacorr.
Mark




Pal, you should first be absolutely sure that the optical performance is
satisfactory.
FORGET chromatic abberation. Test it damn it, ANYWAY YOU CAAAANNNNN!

Doink, as far as how well they work, there's lots of past info on these.
Perhaps try a google on Chromacorr.
One shortcoming I can recall with the 6" Celestron, or other Synta
variant, was sloppiness with the focuser, and this creates havoc using
the Chromacorr. mark

"Doink" wrote in message
...
Greetings

I bought a 6" f/8 Celestron refractor on Astromart---The false color is
horrible. I remember reading about an inline corrector of some kind---not
a simple $49 filter but a rather expensive item---anyone know about these
things? OR, does anyone want a Celestron 6" for $325 plus shipping!!!!!!?

Doink



Go to Orion Telescopes website and take a look at their
V Block filter designed for reducing false color in achro's


http://www.telescope.com/shopping/pr...ProductID=6386






AM

http://sctuser.home.comcast.net/

"Doink" wrote in message
...
Greetings

I bought a 6" f/8 Celestron refractor on Astromart---The false color is
horrible. I remember reading about an inline corrector of some kind---not
a simple $49 filter but a rather expensive item---anyone know about these
things? OR, does anyone want a Celestron 6" for $325 plus shipping!!!!!!?

Doink


Is this any help ?
jc
---------------------------------------------------
Baader Fringe-Killer Filter.

The Baader Fringe-Killer Filter minimizes unwanted blue fringing, comparable
to a
Minus-Violet Filter, while retaining a very pleasing colour balance. This
would be a
contradiction in itself - only made possible by applying modern DWDM plasma
coating
technology, almost a hundred coating layes to be accumulated onto a
planoptically polished
substrate - without destroying the optical figure! This fine optical tool
will help a small refractor
to really put the advertised magnification within reach. Performance rivals
that of the most
expensive colour correcting lens systems, costing 20 times as much!

Properties:

* Offering the brightest image of all colour-correcting devices in the
industry, makes the
Fringe-Killer a must for even the smallest of refracting telescopes.

* Removes blue fringing as well as RED fringing above 650nm.

* Breaks the intensity of the devastating false blue colour in a completely
new way, never
before being manufactured as an astronomical filter.

* Forms a "plateau" of eff. 50% transmission in the blue spectral region
from 450nm to 480nm
- being much more complex to produce than even the narrowest of Nebula
Filters.

* Retains the highest light transmission of all known correcting devices -
bit it filters or lenses
- in all important deep sky wavelengths from 486/501 up to 656nm. LIGHT is
the hottest
commodity for high magnification work.

* Built-in infrared blocker, ranging from 656 to 1150nm, makes it the
perfect tool for CCD work,
as well as afocal projection photography with digital cameras for Moon &
Planets.

* Subtlest of colour variations remain visible in planetary surface detail,
due to the excellent
colour balance.

* Fits 1.25" and 2" eyepiece filter threads.


* Planoptically polished, means perfect sharpness, even when mounted way in
front of a
binocular viewer, or during afocal projection (digital imaging).

* No deterioration of resolution with magnification at 300x or more (seeing
conditions
permitting) as would happen with the usual "flame polished" glass, commonly
used for all
sorts of filters.

* Coating - Plasma assisted, hardest, scratch proof and water impermeable
dieelectric
coatings of almost 50 coating layers on either side, most carefully designed
to extend equal
tension onto either side of the substrate - in order to retain a highest
quality optical figure.

* Will make the performance of a simple f/8 economy refractor look like a
classic f/15
Fraunhofer-Achromate. See it to believe it!!

Thanks. I was wondering about experience with these filters...have you
tried the Baader?

Doink

"john carruthers" wrote in message
...

"Doink" wrote in message
...
Greetings

I bought a 6" f/8 Celestron refractor on Astromart---The false color is
horrible. I remember reading about an inline corrector of some
kind---not a simple $49 filter but a rather expensive item---anyone know
about these things? OR, does anyone want a Celestron 6" for $325 plus
shipping!!!!!!?

Doink


Is this any help ?
jc
---------------------------------------------------
Baader Fringe-Killer Filter.

The Baader Fringe-Killer Filter minimizes unwanted blue fringing,
comparable to a
Minus-Violet Filter, while retaining a very pleasing colour balance. This
would be a
contradiction in itself - only made possible by applying modern DWDM
plasma coating
technology, almost a hundred coating layes to be accumulated onto a
planoptically polished
substrate - without destroying the optical figure! This fine optical tool
will help a small refractor
to really put the advertised magnification within reach. Performance
rivals that of the most
expensive colour correcting lens systems, costing 20 times as much!

Properties:

* Offering the brightest image of all colour-correcting devices in the
industry, makes the
Fringe-Killer a must for even the smallest of refracting telescopes.

* Removes blue fringing as well as RED fringing above 650nm.

* Breaks the intensity of the devastating false blue colour in a
completely new way, never
before being manufactured as an astronomical filter.

* Forms a "plateau" of eff. 50% transmission in the blue spectral region
from 450nm to 480nm
- being much more complex to produce than even the narrowest of Nebula
Filters.

* Retains the highest light transmission of all known correcting devices -
bit it filters or lenses
- in all important deep sky wavelengths from 486/501 up to 656nm. LIGHT is
the hottest
commodity for high magnification work.

* Built-in infrared blocker, ranging from 656 to 1150nm, makes it the
perfect tool for CCD work,
as well as afocal projection photography with digital cameras for Moon &
Planets.

* Subtlest of colour variations remain visible in planetary surface
detail, due to the excellent
colour balance.

* Fits 1.25" and 2" eyepiece filter threads.


* Planoptically polished, means perfect sharpness, even when mounted way
in front of a
binocular viewer, or during afocal projection (digital imaging).

* No deterioration of resolution with magnification at 300x or more
(seeing conditions
permitting) as would happen with the usual "flame polished" glass,
commonly used for all
sorts of filters.

* Coating - Plasma assisted, hardest, scratch proof and water impermeable
dieelectric
coatings of almost 50 coating layers on either side, most carefully
designed to extend equal
tension onto either side of the substrate - in order to retain a highest
quality optical figure.

* Will make the performance of a simple f/8 economy refractor look like a
classic f/15
Fraunhofer-Achromate. See it to believe it!!

Mark D wrote:
Sure Doink, the Chromacorr made by Valery D., of Aries, but do you want
to spend around $500-700 to fix the shortcomings of a refractor worth
$325? Chromatic aberration won't be the only shortcoming with these, so
don't figure on AP performance even with the Chromacorr.
Mark

Valery will show up here and promise some miraculous version of
Chromacorr - next year ;-)