Bresser Messier NT203s/800 OTA features a fast parabolic main mirror and a Hexafoc focuser. It is an excellent tool for astrophotography. This is an aluminum tube with a classical design. The large primary mirror of 203 mm diameter allows for delivering deeper images and a faster optical system. The 85 mm secondary mirror prevents vignetting. The excellent 2.5" Hexafoc focuser makes focusing easy due to its large diameter and smoothness and shifting-free operation. You will love astrophotography with this optical tube. It is easy to take pictures due to the tube rings with a 44 mm universal standard dovetail and a high-end finderscope with a crosshair and laser-engraved scale.
Features:
Aperture: 203 mm
Focal length: 800 mm
Focal ratio: f/3.9
Backfocus fully inward focused: 60 mm
85 mm secondary mirror for optimal illumination
Diffraction limited optics with parabolic main mirror
Large knobs for primary and secondary mirror adjustment
The kit includes:
Aluminum tube with optics
Tube rings with a handle and camera mounting feature
8x50 finderscope with a reticle
26 mm Super Plössl
Find an interesting review on telescopes for kids here.
How to choose a telescope? Find here and here.
Find out the names of the most interesting celestial objects to observe here and here.
Find some interesting information on what you can see with a telescope here.
Допълнителни спецификации

Оптична конструкция

Рефлекторни

Леща на обектива

Нютонов

Диаметър на главното огледало (апертура), mm

203

Диаметър на вторичното огледало, mm

85

Фокусно разстояние, mm

800

Увеличение, x

20–400

Фокусно отношение

f/3, 9

Прагова стойност на резолюцията, ъглова секунда

0, 56

Визьор

8x50

Потребителско ниво

експерти, ентусиасти

Обекти на наблюдение

далечния космос, планети

Продукт известен още и като Messier NT 203 s 800 OTA, MessierNT203s800OTA