N 150/750 telescope: This versatile Newtonian reflecting telescope provides both beginners and more experienced amateur astronomers plenty of light and high stability for a very modest price. It collects so much light with its generous 150mm diameter that distant DSOs such as the Ring Nebula in Lyra or the Dumbbell Nebula become beautifully visible and globular clusters, such as M13, resolve into a multitude of individual stars at their edges. Planetary observing provides rich detail in images of Saturn, Jupiter, Venus and Mars. The f5 focal ratio means this reflector falls into the class of 'fast' Newtonian telescopes. This telescope is therefore particularly suitable for astrophotography. The light gathering capacity of the 150 is 460 times greater than that of the naked eye alone (with a 7mm fully dilated pupil).
The advantages in a nutshell:
- relatively high light gathering power thanks to 150mm aperture
- resistant to vibration and wind due to compact design
- diffraction limited parabolic primary mirror
- high-contrast image due to thin secondary mirror spider vanes
- portable and quickly assembled
- exposure times for astrophotography can due to the short focal length
The PDS version of the Explorer comes with a dual speed focuser. This has a 1:10 reduction ratio for sensitive focusing which is most important for astrophotography, but is also very useful for visual observing. The tube length has been slightly shortened compared to the Explorer P version and the secondary mirror has consequently been enlarged in order to further optimize the system for astrophotography.
The EQ3-2 mount:
This mount is a further development of the EQ-3 mount designed in white. It provides a stable base for most medium-sized optics and is ideal for exploring the night sky. Once you have aligned the parallactic mount with the Pole Star, you can easily sight on an object, adjust it in the field of view and track it using the flexible slow-motions. Fine adjustment is possible in both right ascension and declination. The polar elevation at the observing site can be set using the fine scale provided and adjusted perfectly by using two screws. Both polar finder and electric motors plus a control can be retrofitted to both axes: the EQ3-2 is suitable not only for visual observing, but also for getting started in astrophotography. With optional add-ons such as the motor kit or GoTo upgrade kit, long exposure astrophotography also becomes possible. With a little practice, you will soon be able to produce successful images of galaxies and nebulae.
Included with the mount:
- mount with manual adjustment knobs
- extra brace with eyepiece tray
- suitable counterweights