astronomy.de
Astrophotography by H.Dannhoff
Equipment
1. Observatory
The Fynn-Observatory lies in the 900 soul village of Nordwohlde in the administrative district Diepholz -- North Germany. The observatory, made in Australia, consists of GFK and has a diameter of 2.3 m. The Observatory houses a CGE german mounting of Celestron. A great advantage of the mounting is replacing a different optics fast. The column is poured of concrete. By the solid construction of the instruments and by the computer-controlled PEC drive a good tracking is ensured. This is in addition by a ST2000XM CCD dual camera a separate after leading chip of SBIG optimizes. New is the QHY8L with a large chip (28mm diagonal).
The country sky about Nordwohlde offers 6 m2 at ideal conditions. Merely in the direction of the north one recognizes the light pollution of Bremen. The village itself is which ones are turned off as of 01:00 clock with some streetlamps fitted.
Base literature: I primarily use the book The Night Sky Observers guide of Willmann Bell Inc for the visual observation (and object choice for the CCDimaging). A masterpiece with infinitely many objects. With cards, object drawings/pictures and descriptions.
Base software: A PC is used for the control of the telescope and the CCD cameras. The software guide 8.0 and Starry Night per serve for the navigation of the telescope and the representation of cards. A Mac is used for the digital imaging.
2. Telescopes
Super Apo Refractors 130 mm 1307M25
130 mm f/7 Astreya, super-apo four lenses (with interferometric test report), carbon tube/CNC aluminium, five internal baffles
Optical design: 4 elements
Focal Lenght: 910 mm
Aperture: 130 mm
Chromatic Correction: SuperApo
RMS (not worse): 0,03 lambda
Strehl Number (not worse) - 0.96
Multicoating
Scopos TL 805 as Guidingscope
Exact focal length 504 mm
Aperture 80 mm in the setting/83 mm without setting
Glass of types Ohara FSL 5 (comparable bulkhead FK -5 ) / NBM 51
Compensation Fully multinational Coated of 400 nm to 700 nm
Correction very good correction of 435 nm to 707 nm
TS Newton 10“ f/5
Aperture / focal length 254mm / 1250mm / f/5
Diameter of secondary mirror70 mm
OTA weight15.5 kg (with clampshells, focuser and viewfinder)
OTA diameter / length303 mm / 1150 mm
Main mirrorBK-7 substate, diffraction limited operation guaranteed
Focuser 2" Crayford with 1:10 transmission
Limiting visual magnitude14m7
Resolution 0.46"
Collimation aidCentre marking ring on main mirror
Intes Mikro Alter M715 - Maksutov Cassegrain
Aperture / focal length 180mm / 2700mm / f/15
Diameter of secondary mirror45 mm
OTA weight7,0 kg
OTA diameter / length 220 mm / 600 mm
Main mirrorpyrex
3. Cameras
SBIG ST 2000 XM
A dual chip camera is Quality inter line chip the ST2000XM with a High. The TC 237 chip is used for the tracking. Your download time is over the USB connection approx. 4.5 seconds.
The camera can be only not headed by a PC but either offed a Mac. User kindness and out agendas image processing qualities combined with a CCD tax software become please many a Mac user so.
CCD Kodak KAI-2020M +
TI TC-237
Pixel Array 1600 x 1200 pixels
CCD Size 11.8 x 8.9 mm
Total Pixels 2 million
Pixel Size 7.4 x 7.4 microns square
Full Well Capacity ~45,000 e- unbinned
~90,000 e- binned
Dark Current <0.1e-/pixel/sec at 0 deg. C.
Antiblooming Standard
CCD Kodak KAI-2020M +
TI TC-237
Pixel Array 1600 x 1200 pixels
CCD Size 11.8 x 8.9 mm
Total Pixels 2 million
Pixel Size 7.4 x 7.4 microns square
Full Well Capacity ~45,000 e- unbinned
~90,000 e- binned
Dark Current <0.1e-/pixel/sec at 0 deg. C.
Antiblooming Standard
QHY8L
QHY5
Total pixel : 3110 x 2030
■Active pixels: 3032 x 2016
■Pixel Size: 7.8um x 7.8um square
■Color method: RGB BAYER film on CCD
■Effective sensor area: 28.4 mm diagonal
■Readout noise: 6-10 e @600 Kpixel/s
■QE: 60% at Green (Peak) , 50% at Blue and H.a
■Microlensing on chip
■Progressive Scan
■ABG: -110dB
■16bit ADC with CDS and Preamp
■USB2.0 High Speed interface
■Build in temperature sensor
■DC201 with TEC controller/Regular
■Ultra small size suitable for primary focus imaging and Hyperstar
■Weight: 400g
■
Micron MT9M001 1/2inch CMOS sensor, 1280 x 1024 Active pixels, 1.3 megapixels, Pixel Size: 5.2um x 5.2um, Peak QE = 56%, USB2.0 High Speed download; 24Mpixel/s 15 FPS @ 1280 x 1024; 50 FPS@ 640 x 480 Uncompressed Video data, Built in Opto Isolated Guide Port Progressive Scan, ROI support,