Here I Use these optical tools:
Skywatcher Flextube 250P Dobsonian Reflecting Telescope, f1200, 254mm aperture.
APM HDC 20mm 100 Degrees Eyepiece.
Televue Ethos 8mm 100 Degrees Eyepiece.
I observed M42 Orion Nebula and M45 Pleiades Open Star Cluster.
Sky-Watcher Skyliner-250P FlexTube Dobsonian
254MM (10") F/1200 PARABOLIC TRUSS-TUBE DOBSONIAN TELESCOPE
The Dobsonian mount, popularized by John Dobson in the late 1970’s and utilised in all Sky-Watcher Dobsonian telescopes, is a very simple but effective method of mounting a Newtonian Reflector, based on the alt-azimuth principle. Fast and easy to set up, the Sky-Watcher Dobsonian mount consists of a box-type mounting which allows the telescope to pivot in altitude, while the box itself is rotated on a base in azimuth. The secret of the design is to correctly balance the optical tube and to use frictional materials, which allow it to move easily when nudged but to stay in position when not. The mount is designed to be driven by hand as opposed to slow motion controls.
One of the potential downsides of a Dobsonian telescope is its physical size. To address this issue, especially when it comes to storage or transportation Sky-Watcher introduced their patented FlexTube system. The optical tube on a Sky-Watcher FlexTube Dobsonian telescope can be partially collapsed when not in use greatly reducing its length. This is a huge benefit for storage and transportation.
Magnifications (with Eyepieces supplied): x48 & x120
Highest Practical Power (Potential): x500
Diameter of Primary Mirror: 254mm
Telescope Focal Length: 1200mm (f/5)
Eyepieces Supplied (1.25"): 10mm & 25mm
Dual-Fit 1.25"/2" Crayford Focuser
Parabolic Primary Mirror
0.5mm Ultra-Thin Secondary Mirror Supports
9x50 Finderscope
Direct SLR Camera Connection
3-Point tube locking system
Wooden Alt-Azimuth Mount with Accessory Tray
56% more Light Gathering than 200mm
