Hubble Hyperbolic Newtonian Astrograph Optics:

Hubble Optics announced the introduction of its breakthrough Hyperbolic
Newtonian Astrograph (HNA) optics for the wide-field visual observation and
astrophotography.

The combination of a lightweight sandwich hyperbolic primary mirror and a
matching custom corrector provides excellent wide-field performance for both
visual observation and astrophotography, with numerous advantages over
existing solutions:

Superb on-axis image quality, with a Strehl ratio greater than 0.99.
Much better overall performance than a parabolic mirror with a Ross
corrector.

Meets or exceeds the polychromatic performance of a parabolic mirror with a
Wynne corrector, with much fewer problems from ghosting, baffling, and
reflections.

The corrector takes up less space, and has sufficient back focus of 130mm
for easy insertion of off-axis guiding hardware and filters.

Excellent optical performance for both wide field visual observation and
astrograph at an unprecedented price/performance ratio.

The HNA corrector will be initially available in 3.5-inch versions with a Hubble
Optics lightweight-sandwich primary mirrors, 12-inch to 40-inch. The delivery
time is about 2-8 months. The complete optical set includes a
lightweight-sandwich hyperbolic primary mirror, a high-quality secondary
mirror, and a matching custom corrector assembly.

The mirror will be shipped to you directly from Hong Kong.

The Hubble Optics Plate Glass Sandwich Hyperbolic Primary Mirrors
are priced at:

12.0" F/4.2+  $1200(Plate Glass)/$1850(Pyrex)
14.0" F/4.0+  $1650(Plate Glass)/$2550(Pyrex)
16.0" F/3.8+  $2200(Plate Glass)/$3200(Pyrex)
18.0" F/3.8+  $3200(Plate Glass)/$4400(Pyrex)
20.0" F/3.5+  $4200(Plate Glass)/$5500(Pyrex)
24.0" F/3.5+  $8950(plate Glass)/$11750(Pyrex)
24.0" - 40.0"  Please Contact US

The primary mirrors will be 0.95 Strehl wave front or better, 92%
Semi-enhanced coated.

The HNA matching 2-element corrector optics with 99.5% broadband
AR coating is priced at:
3.5" complete corrector assembly: $1000


Complete OTA with all the optics and 3.5" Feather Touch Focuser:

14" f/4.2 OTA $6350
20" f/3.8 OTA $9950

It will provide more than 50mm diameter fully corrected flat field.
A: The back focus,129.9mm
Butterfly Nebula in Cygnus (Hubble 12" f/4.27 HNA; One hour and 15 minutes through a hydrogen alpha
filter binned 2X2; SBIG STL11000M camera.
Paul Zelichowski ).   
Andromeda Galaxy (Hubble 12" f/4.27 HNA, Luminace filter 60 minutes, SBIG STL11000M camera.
Paul Zelichowski ).   
Butterfly Nebula in Cygnus (Hubble 12" f/4.27 HNA; the hydrogen alpha/R/G/B filters: 75/40/40/63 minutes.  
SBIG STL11000M camera.
 Paul Zelichowski ).   
The Veil Nebula (Hubble 12" f/4.27 HNA;  HaRGB 160:40:40:63 minutes,all binned 2X2; SBIG STL11000M
camera.
Paul Zelichowski ).   
It's a cropped area of the Rosette Nebula of similar size between the two scopes.  The Takahashi
image was 3 hours at f/2.85. The Hubble Optics image was 90 minutes at f/4.27   
Paul
Zelichowski
).   
Rosette Nebula  (Hubble 12" f/4.27 HNA; the hydrogen alpha/R/G/B filters, SBIG STL11000M
camera.
  Paul Zelichowski ).   
The Leo Trio of galaxies  (Hubble 12" f/4.27 HNA; This LRGB is composed of 253 minutes of Luminance
data and combined with only 36 minutes each of the RGB channels for a total  exposure of 6 hours and
one minute. SBIG STL11000M camera.
Paul Zelichowski )   
M81 and M82 in Ursa Major  (Hubble 12" f/4.27 HNA; an LRGB image, exposure times were 145 minutes
Luminance and RGB was 45:45:39 minutes respectively. SBIG STL11000M camera.
Paul Zelichowski )   
M106  (Hubble 12" f/4.27 HNA; LRGB with 150 minutes of Luminance and 90 minutes each RGB, with 60
minutes of Hydrogen Alpha in place of red channel.   SBIG STL11000M camera, Baader LRGB Ha S2 O3
Hb.
Paul Zelichowski )   
IC1396  (Hubble 12" f/4.27 HNA.  SBIG STL11000M camera. Paul Zelichowski )   
Rosette Nebula cropped shot  (Hubble 12" f/4.27 HNA; the hydrogen alpha/R/G/B filters, SBIG
STL11000M camera.
  Paul Zelichowski ).   
Andromeda Galaxy (Hubble 12" f/4.27 HNA, Luminace filter 60 minutes, LRGB Takahashi ED180,
SBIG STL11000M camera.
Paul Zelichowski ).   
M33 Galaxy in Triangulum (Hubble 12" f/4.27 HNA, LRGB 60:30:30:30 munites, SBIG STL11000M
camera.
Paul Zelichowski ).   
Elephant Nebula (Hubble 12" f/4.27 HNA,  75 minutes Hydrogen Alpha, SBIG STL11000M camera.
Paul Zelichowski ).   
Hubble HNA20 OTA, Paul Zelichowski
M13  (Hubble 20" f/3.8 HNA OTA; SBIG STL11000M camera. Paul Zelichowski ).   
M101  (Hubble 20" f/3.8 HNA OTA; SBIG STL11000M camera. Paul Zelichowski ).