Folder ASA-Astrographen E

7/30/2019 Folder ASA-Astrographen E

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o st d t t uturHIGH-TECH ASTROGRAPHS

E


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peRfecTion RiGhT DoWn To The laST DeTail

ASA Astrographs

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strtgrrs ur tm. T rt t systm s bsd t umrmsgy

t dsg Grm ysst p Kr: hs d rrtrs w d t

rgst ccD rrys mmry vb tdy! Usg t bst quty mtrsvb t mrkt, aSa grs v dvd rdut w vs tg

t b dsrd. prt mgg rrm vrg rg d vw, ud wt

sur st rt kd gtwgt but rgdy strutd t tub md

rm utr rd rb br m st mtr.

with a special corrector lens system, the H- series provides

the user with finer spot sizes at greater speeds: The optical

system resolution is overall higher, which makes the

H-series perfectly suited for high-resolution CCD - cameras.

With a fast focal ratio of f 3.0 it is also the ultimate wide

field and survey instrument. No surprise therefore, that the

H-series has been t he choice of telescope for professional

research projects such as new Super-Wasp II project, which

will deploy the telescopes for search and discovery of new

exo-planets. Amateurs and professionals alike will greatly

appreciate these very fine optical instruments.

The N-series astrographs employ a parabolic main

mirror with a focal ratio of f 3.6. The N-series stands

out among other Newtonian Astrograph, not alone

because of its well-thought out design and great

quality craftsmanship but also because of its fast

system ratio and great versatility: By switching thecorrector lens system the focal length of t he telescope

can be shortened or extended with minimum effort.

This makes this telescope a flexible all-rounder tool

and worthwhile the investment.

Usg t stdrd 3 Wy crrtr

rt /3.6 b vd. T

mk t systm v str, t 2 r 3

Rdur w wr t rt dw t

/2.75. T rs t gt (.g.

w mgg sr r d sky trgts)

t aSa Brw rrtr w rdr

rt 6.8.

All ASA Astrographs are manufactured from superior

Suprax glass material and polished to an accuracy

of P/V = 1/7 lambda. The coating is an advanced

aluminum coating employing enhanced multi layered

overcoats to increase the reflectivity of telescope

mirrors by an incredible 97% over a wide range of

the visible spectrum. Every mirror is shipped with

an individual interferogram to document the quality

of the mirror surface. All of our secondary mirrorsare made according to the same specifications. On

request, premium Astro-Sital ceramics polished by

Lomo Optics can be ordered (here, a longer delivery

time has t o be taken into account).

The tubes are produced with high-grade carbon and

furnished with black velvet inside to avoid stray light.

Astrographs with apertures of 16 and 20 inch are also

offered as open truss models. Carbon used in the tubes

offers a very low thermal expansion and great rigidity.

Thus, the focus is very stable with no detectable tube

flexure both great advantages!

ASA astrographs have very fast focal ratios. Thus, one

will achieve a good signal to noise ratio with short

exposure times. Through the uncompromising optical

design of German physicist Philipp Keller, the corrector

lens system deployed in ASA telescope can handle

large size CCD planes. Even with the largest available

CCD cameras in use today spot sizes will be corrected

perfectly all the way into the image corners.

aSa strgrs r vb tw dsttmds:

The H-series astrographs (currently available only as an 8

inch H-series astrograph) differ from the N-series in that

they use a hyperbolic main mirror design. In combination

Before our items go on sale, the whole system is tested (auto collimation).


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g-quty rrt umum

(7075aiZMgcu1,5) ur mdr

cnc-rdut ts.

To correct the field of view of your telescope ASA uses

correctors designed by the experienced German physi-

cist and optical engineer Philipp Keller. All correctors

offer sufficient back focus and can be connected to a

wide variety of CCD and DSLR Cameras. Using differ-ent ASA correctors, the telescopes focal length can be

altered to f/3.6, shortened to f/2.75 or extended to

f/6.8. The photogr apher can decide which focal length

to use based on the conditions (seeing, wind asa.) and

the nature of the object targeted.

This high precision electric focuser developed by ASA is

delivered together with all ASA Astrographs. The focuser

can also be purchased as a stand alone device to upgr ade

your existing telescope and imaging system. The focuser

can be controlled from within Aut oslew or can be used by

our standalone software. ASCOM compatibility is guar-

anteed in both options. The focuser is connected to the

coRRecToRS

focUSeR

acceSoRieS

This versatile feature is only available for the N-Serie as-

trographs. Here is brief example of how this would apply

to a smaller telescope: ASAs 8inch N-Series astrograph

would render a focal length of 730 mm at f/2.6, 558

mm at f/2.75 and 1380 mm at f/6.8 respectively. Allour correctors can also be purchased individually and will

work in most Newton and Dobson telescopes. ASA also

manufactures correctors for classical Schmidt-Cassegrain,

Cassegrain and professional Ritchey-Chrtien telescopes.

Visit our website to learn more about our broad range of

correctors available to date!

computer via a USB connection. Six ball bearings will

ensure a perfect and torsion free focusing run. For heavy

image trains and / or when using your system remotely,

we highly recommend our OK3-Z model. It is delivered

with an internal gear rack which has shown to enhance

motion stability and focus repeatability also when using

heavy imaging equipment (e.g. 6kg and more).

caMeRa aDapToR:

As a part of your order, ASA can custom producean adapter that will take into account your cameras

optical back focus and connection type.

TUBe RinGS:

To connect the astrograph to your mount, we highly

recommend using original ASA tube rings: They are

CNC machined down to a to lerance of 0,01 mm and

are come with a handy quick fastening system that

can easily be accessed also during night operations.

fliGhT caSeS:To carry your astrograph safely around with you

when you travel, ASA offers a quality craf ted f l ight

case: steel ball edges, aluminum profi les, birch

plywood, f l ip handle gr ips, butterf ly clasps and

ample space to f it your astrograph alongside the

focuser, tube r ings, correctors, cables and camera

adapters.

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Technical SpecificaTionS n-srs

aSa 8n aSa 10n aSa 12n aSa 16n aSa 20n aSa 20nG**

Aperture 8 (200) 10 (250) 12 (300) 16 (400) 20 (500) 20 (500)

Focal length 760 mm 950 mm 1140 mm 1520 mm 1900 mm 1900 mm

Corrector Optional* Optional* Optional* Optional* Optional* Optional*

Secondary 90 mm 100 mm 120 mm 130 mm 140 mm 140 mm

Focuser 3 3 3 3 3 3Tube length 620 mm 790 mm 990 mm 1310 mm 1631 mm 1631 mm

Tube diameter 255 mm 300 mm 360 mm 470 mm 590 mm 590 mm

Weight 8 kg 11 kg 18 kg 32 kg 49 kg 54 kg

*crrtr lss crrtd foV f rt -tr Wgt

4 Wynne 3 60 mm f3.8 0,990 1420 g

3 Wynne 3 50 mm f3.6 0,952 780 g

3 Reducer 4 30 mm f2.8 0,730 720 g

2 Reducer 4 20 mm f2.8 0,730 320 g

2 Barlow 5 35 mm (45 mm) f6.8 1,800 315 g

Technical SpecificaTionS h-srs

aSa 8h

Aperture 8 (200 mm)

Focal length 560 mm

Corrector Installed

Secondary 100 mm

Focuser 3

Tube length 580 mm

Tube diameter 255 mm

Weight 7 kg

ASA ASTROGRAPHS

FACTS. VALUES. SPECS.

Technicalmodificationsandprintingerrorsexcepted.

04/2012.

ASA As t r osy s teme GmbH Ga lgenau 19 A -4212 Neumark t i . M.Phone +43 (0) 79 42/778 11 -50 o f f i c e@as t r osy s teme.a t www.as t r osy s teme.a t

* Information relating to our new series of Newton, Schmidt-Cassegrain, Cassegrain and Ritchey-Chrtien correctors can be found on our website: http://www.astrosysteme.at/eng/correctors.html** Open truss design

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Folder ASA-Astrographen E