MPCC Multi-Purpose Coma Corrector, MkIII
RCC-I, Rowe Coma Corrector
RCC Off-Axis Guider
Telecompressor Mark II
MPCC Mark III Multi-Purpose Coma Corrector
MPCC Mk III
(ready to attach to any DSLR or CCD Camera)
MPCC Coupled to 2" eyepiece
MPCC Mk III (Exploded View)
MPCC Configured for 1¼"
The new Baader Planetarium MPCC
owners of fast Newtonian telescopes to use their instrument for taking
stunning wide-field images, or visually, for delivering wide-field views
with stars that remain pinpoint to the edge - with no magnification
The MPCC has been optimized for Newtonians
with focal ratios from f/3.5 to f/6, and will deliver 12micron stars across a
full 35mm frame size. Independent optical laboratory tests (by ITE)
have confirmed that the MPCC is the sharpest wide-field coma corrector
available for imaging, and provides the best edge of field illumination
(least vignetting). Visual
users have reported great results even down to f/3.5. The optics are anti-reflection coated with
Baader's PHantom Group Multicoatings. The MPCC is also priced very
reasonably. It's modularity lets you purchase only the parts you need.
For imaging with DSLRs, only the MPCC is required (for the maximum field
size, the MPCC MkIII is designed to work perfectly with the
Baader Protective EOS T-rings). For visual, the MPCC
MkIII can be configured with any of our eyepiece holders or directly coupled to 2"
Astro T-2 System components.
New Features of the MkIII Version:
New Optical Design - calculated for an unvignetted field
down to f/3.5.
Improved sharpness across the field.
Phantom Group© Multicoated for maximum transmission and
freedom from reflections from UV to NIR.
Attaches directly to the
Baader Protective EOS T-ring through use of
the optional adapter.
44mm Clear Aperture when using the M48 (2") filter thread
or the Protective T-ring.
Dob users with
f/3.5 - f/5 scopes have been discovering the unique benefits of the MPCC
versus other coma correctors. The MPCC can be inexpensively configured for visual use with 1¼"
and 2" eyepieces. Please see our
MPCC Visual Configuration page for new
information on some exciting visual configurations.
No Magnification Increase: The MPCC delivers full
fields for the widest 2" eyepieces. Why spend the big $$ on a large
widefield eyepiece, only to have its field squeezed by the coma corrector.
Now, a 31mm ultra-widefield eyepiece can perform like a 31mm, and not a 26mm..
Also, unlike some correctors, the MPCC has minimal effect on the eyepoint
and blackout behavior of long focal length eyepieces.
No additional Back-Focus (in-travel) Required: In
fact, in direct-coupled configurations, the MPCC actually increases
back-focus by about 10mm. If your eyepiece will focus without a coma
corrector, it Will reach focus with the MPCC. This is not the case
with some other coma correctors.
Reduced Vignetting: The new MPCC MkIII now works
even better with the largest true field 2" eyepieces. Due the closer position of the
field lens to the focal plane, the MPCC MkIII is able to provide a larger fully
illuminated true field than any other coma correctors (both visually and
Low Cost: The MPCC is priced lower than other
correctors. Some users have even purchased more than one and leave
them permanently attached to their favorite 2" eyepieces.
MPCC MkIII - with Baader Protective T-ring
The MPCC is the perfect match for today's
Digital SLRs. Owners of these new cameras find them to be ideally
mated with today's fast f/3.5-f/5 Newtonians required to keep exposures short.
The MPCC enables these users to fully correct their scopes and produce
superb pinpoint color deep sky images without the complexity of more
expensive CCD astrocameras. Owners of Vixen Newtonians will appreciate
the inclusion of filter threads, and the high sharpness of the images.
Unlike other coma-correctors, the MPCC does NOT extend the focal ratio (so,
your images will be shot at the full speed of your telescope).
The MPCC inserts into 2" focusers and has
external T-threads on the output side (and is also threaded for standard
2"/48mm filters). Simply attach any 35mm film or digital SLR to the MPCC,
using commonly available T-adapters. Users of CCD cameras can attach
in the same way through the use of our
Astro T-2 System components (adapters, extension tubes).
The MPCC is designed for a nominal 55mm distance from the mounting flange to
the film plane (55mm is the standard dimension for all SLRs, measured from
the front of their T-adapter to their image plane). It also extends the focus
point by approximately 10mm, so no additional back-focus is needed to use
the MPCC (of course, this assumes your camera will already reach focus in
your telescope, without the MPCC).
The MPCC alsoincludes a removable stop
flange. Removal of this flange exposes an M48 external thread, which
enables the MPCC to be directly coupled to 2" eyepieces and inserted fully
inside 2" focusers. For more info, please see
MPCC Visual Configuration.
MPCC has been tested and found to work well on Meade SN Schmidt-Newtonians
(see Bill Christie's comments below)
Please click on the thumbnail below for an
example of the imaging improvements from using the MPCC. These
images were sent in by one of our customers using a Celestron 8" f/5 NGT,
using a Canon Digital Rebel (300D) at prime focus with and without the MPCC.
"Using the Baader Multi-purpose Coma Corrector from
Alpine Astro the coma in my 12-inch f/5 telescope is gone - wow! - my images
are now flat across the entire field, and I find that amazing, since this
telescope previously produced a moderate to large amount of coma in my
images. The other delightful thing I found was the MPCC screws
straight into the bottom of my 2-inch eyepieces. Thanks Baader, Thanks
Alpine Astro." Paul Mayo, SKY:Lab Astronomy Software
see Paul's outstanding images taken with the prior
Conclusion: A Baader MPCC Coma Corrector
with proper collimation, tracking and good focus WILL give you pinpoint
stars in your photos, right across the field of view (1.6 degrees in an
SN-8). The Baader MPCC Coma Corrector joins the Telrad and Accufocus in my
list of MUST-HAVE equipment (for astrophotography) when using a Meade LXD-75
SN-8. Bill Christie
http://www.zodiaclight.com (see this site for some nice comparison shots
The weight of the MPCC by itself is 80gm (2.8oz).
Baader MPCC MkIII, Multi Purpose Coma Corrector (# MPCC)
- MPCC T-Ring Spacer (#MPCC-SPCR) optional, required
for max field size with EOS Protective T-ring
RCC I Rowe Coma Corrector
RCC-I + VariLock 46 + Canon EOS
RCC-I + RCC Guider + Canon EOS
The new Baader Planetarium RCC-I
(Rowe Coma Corrector) is designed specifically to correct Coma in fast
Newtonian imaging systems. The RCC is the ideal match for today's
Digital SLRs and CCD Cameras.
Long Back Focus: The RCC-I triplet
optical design has been optimized to work at a large 91.5mm back-focus
distance, enabling the use of Off-Axis Guiders, Adaptive Optics, and Filter
Wheels. The RCC even allows users of DSLRs to incorporate off-axis
guiding with the Baader RCC Off-Axis
No magnification increase: Unlike
most other coma correctors, the RCC-I does not impart a barlow effect - it
works at 1:1, with no loss in imaging speed or reduction in field size.
Fast Imaging Speeds: The RCC-I has been optimized for Newtonians
with focal ratios from f/3.5 to f/6 (nominally designed for f/4).
Ease of Focus: Addition of the RCC-I into the
optical train extends the focal point slightly (approximately 5mm, in an f/4
system). This important attribute ensures that your system will be
able to reach focus without needing to shift the primary mirror or increase
the size of the secondary mirror ( * IMPORTANT; this assumes
your system will already reach focus without the RCC).
The RCC-I inserts into 2" focusers and has
external T-threads on the camera side for attachment to any other T-threaded
accessory. The RCC-I also includes a removable
stop flange. Removal of this flange allows the RCC to be fully
inserted into 2" focusers. The RCC is also threaded for standard
The RCC is designed for a nominal 91.5mm
distance from the mounting flange to the image plane (55mm is the standard
dimension for all SLRs, measured from the front of their T-adapter to their
image plane). The 91.5mm distance needs to be held to within +/-3mm for best
image quality. We sell a range of adapters and extension tubes that
can be used to configure practically any imaging system to meet the 91.5mm
Astro T-2 System). In particular, we recommend the
Baader VariLock Variable Extension Tubes.
Users of DSLRs
will find the Baader RCC Off-Axis
Guider to be the perfect compliment to the RCC-I. It is
designed to have the proper spacing needed to meet the 91.5mm requirement,
and offers precise axial and radial adjustments for ease of locating
* Back Focus Example:
assume that you have a DSLR and the matching Baader RCC off-axis guider.
That combination of equipment has a combined path length of 91.5mm (which is
intentionally the back-focus spec of the RCC). If you attach a plain 2
nosepiece to the front of the Off Axis Guider + DSLR and then insert them
into the 2 focuser of a Newtonian, your scope would need at least 91.5mm of
back focus in order to reach focus on the chip of the DSLR. Now, remove the
2 nosepiece and replace it with the RCC-I. Re-insert the assembly fully
into the focuser until the off axis guider seats against the focuser (the
RCC inserts fully into
the focuser since it is 2 OD), focus the camera, and you should find that
the focuser would be racked out about 5mm farther than it was with just that
plain 2 nosepiece.
The weight of the RCC by itself is 142gm (5oz).
Baader RCC-I, Rowe Coma Corrector (# RCC-I)
RCC Off-Axis Guider
RCC Off-Axis Guider
RCC-I + RCC Guider + Canon EOS
(also shown with LVI SmartGuider)
Baader's new RCC
Off-Axis Guider is matched specifically for the RCC-I Coma Corrector and
Digital SLR cameras. The guider's 36.5mm body length sets the
backfocus at the 91.5mm nominal distance required for the RCC-I.
The RCC Off-Axis Guider incorporates
convenient axial and radial guidestar adjustment, without loosening or
affecting the main
camera connection or orientation. For axial (front to back) guidestar alignment, simply turn the
small knurled thumbscrew either direction to shift the guidestar along the
optical axis (the thumbscrew actuates an internal mechanism that tilts the
internal prism). For radial (side to side) adjustment, loosen the bottom
knurled thumbscrew and rotate the body radially (140 degree range). Simple, precise, and robust. Accepts 1.25" autoguiders and guiding
The weight of the RCC Gider by itself is
- RCC Off-Axis Guider
Alan Gee Telecompressor Mark II
A common limitation that plagues owners of
most popular Schmidt-Cassegrain telescopes is the narrow field size and high
magnifications produced by their slow optical system (typically, f/10).
Until now, owners of SCTs have lacked a truly versatile and high-quality
method of reducing their f/10 (or slower) systems for faster, wider,
photographic/CCD and visual fields. (note: the telecompressor is not
intended for use with the Meade native f/6.3 SCTs).
Using the Alan Gee with 1¼
eyepieces can yield actual fields of view that match or exceed what you
could only achieve with expensive 2" eyepieces!
has developed a truly unique and extremely versatile
telecompressor system that delivers the finest wide flat fields your SCT is
capable of. The key to the Alan Gee Mark II Telecompressor is its
innovative optical and mechanical design. Unlike the commonly available and
simple single-purpose solutions, the Alan Gee Telecompressor Mark II has
been engineered specifically to work well with SCTs in a wide variety of
visual and imaging configurations. The unique design of the Alan Gee Telecompressor positions the lens elements several inches inside the
telescope's central baffle tube (see the
C8 Cutaway, which
shows the lens mounted in the standard imaging configuration). The result
is a sharp, wide, flat field, at a fast focal ratio of
f/5.9 and it
even works superbly with Baader Planetarium, Zeiss, and Celestron Binocular Viewers!
That's right. The Alan Gee Mark II is
designed to function with many popular binocular viewers. At last, you
can use your large aperture SCT to produce stunning wide field binocular
views. For more information on this unique telecompressor system,
including some sample CCD images, please click on the link below.
MORE INFO | PRICING
Baader TurboFilm is the highly transparent crystal clear film (not
Mylar!) developed for scientific applications and used as the base material
for the renowned Baader AstroSolar. It is a monomer
film which was found after thoroughly testing more than 200 different film
samples on Baader's Zeiss autocollimator. This film was used in German
Science Institutes as an optical membrane for nuclear and particle physics
experiments. The basic substrate has been further refined and homogenized by
a proprietary annealing process that was developed exclusively for Baader
Planetarium. Due to these treatments Turbo Film attains near-perfect
homogeneity and performs equal to a 1/10 wave plane parallel optical window.
In fact it has the lowest wedge error of any existing optical window.
TurboFilm will protect your valuable optical equipment, close telescope
tubes against dust and humidity, greatly reduce air currents - all without
reducing the optical quality of your telescope.
This amazing optical material enables cost-effective uses for amateurs and
professionals that were never before possible.
Some Suggested Uses:
window for Newtonians and Cassegrains (ie, Tak Mewlons) up to 20" Dia. (or
off-axis windows for larger telescopes). Reduce Tube Currents,
Seal out Dust and Dew to Protect Coatings.
for protecting all telescopes (incl. refractors) from harsh conditions (ie,
salt spray near coastal areas).
Observatory Dome Slits or Observing Room Windows.
Research Uses: Cost-effective precision optical windows for sealing of test
chambers and enabling remote optical inspection. Isolation of large
Roll Size: 127 x
51cm (50" x 20")
Note: In order to maintain the high optical
quality of TurboFilm, the film must be mounted free of stress and wrinkles.
To create a precision optical window for your
telescope using TurboFilm, click on the following link for a method of
constructing a simple and inexpensive cell.
For an interferometric report on the optical
performance of TurboFilm, click on the picture link below:
TurboFilm Interferometric Report
Last Update 03/14/11