Astronomy Specialist

SKYWATCHER QUATTRO 200 f/4

$899.00
SKU: SW200Q-OTA

Sky-Watcher

Newtonian

9.5 kg


 

The SkyWatcher 200 Quattro is a Newtonian telescope with the super fast focal ratio of f/4. If compared with a f/5 telescope, the photographic exposure with a f/4 system is 40% shorter, making it a great time saver. This instrument is ideal for astrophotography and it will deliver sharp images across a large flat field when used with the SkyWatcher aplanatic coma corrector.

The 2" Crayford focuser is solid, precise and backlash free. It operates at two speeds due to the 10:1 reduction mechanism for an extra fine focusing adjustment, which is paramount for astrophotography and high resolution observations.

The secondary mirror is oversized in order to have a fully illuminated field and to avoid any vignetting. It is collimable by using 3 grub screws and the offset can be adjusted by using the central spring loaded screw.

The primary mirror sits on a 9 points cell and is collimatable with 3 pairs of push & pull screws. 

Both mirrors are made in borosilicate glass which have low thermal expansion coefficient. That means that the precise optical surfaces of the mirrors remain the same while the glass will cool down. 

The aluminium tube is internally blackened to avoid internal reflection, enhance contrast and to absorb stray light.

 

 

Specifications

 

Optical design

Newtonian reflector

Objective diameter

205 mm

Focal length

800 mm

Focal ratio

f/3.9

Secondary mirror

70 mm (minor axis)

Linear obstruction

35 %

Resolving power

0.60 arc second

Stellar limiting magnitude

14.0

Max. magnification

400 x

Light gathering power

816 times the human eye

Mount attachment

Tube rings on Vixen style bar

Focuser

Crayford dual speed (10:1)

Tube weight

9.5 kg

Tube length

730 mm

Tube diameter

235 mm

SKU

SWP2008-OTA

 

 In the box

 

  • Newtonian Quattro 200 f/4
  • Tube rings on Vixen style bar
  • 8x50 finderscope
  • 2" tube extension for 2" eyepieces
  • 2" to M42 and 2" to 1.25" adapter
  • Piggyback 1/4" screw with camera locking nut
  • Eyepiece not included
Gallery

 

 

 

M16 by Stefano Salvi | Quattro 200 f/4, QHY268M, Antlia 3nm Pro SHO filters.

    SKYWATCHER QUATTRO 200 f/4.

    SKYWATCHER QUATTRO 200 f/4

    $899.00

    Optical design

    Newtonian

    Image circle

    Focal ratio

    f/3.9

    Aperture

    205 mm

    Focal length

    800 mm

    Optical thickness

    Threads

    Cooled

    Colour or Mono

    Pixel size

    Sensor dimensions

    Resolution

    Sensor diagonal

    Quantum efficiency

    Read noise

    Fullwell capacity

    Bit depth

    FPS

    Camera backfocus

    Filter size

    Filter size

    Bandpass (FWHM)

    Bandpass (FWHM)

    Glass thickness

    Mount type

    Payload capacity

    Latitude range

    Dovetail saddle

    Slew speed

    Encoders

    Periodic error correction

    Counterweight shaft

    Azimuth adjustment range

    Internal diameter

    Illuminated diameter

    Compatible telescope external diameter

    Weight

    9.5 kg

    Length

    Width

    Height

    View product