EXPLORE SCIENTIFIC HR Coma Corrector

2" High Resolution Coma-Corrector with integrated helical focuser. Eliminates coma, field-curvature and astigmatism in newtonians.

  • Eliminates coma, field-curvature and astigmatism in newtonians
  • Diffraction limited performance on axis and in the field
  • Flattens the field
  • Works for very fast systems down to f/3
  • Four-lens construction
  • Can be used with almost all 2" focusers on the market

€345.00*

Available, delivery time: 1-3 days

Product number: 0510330
GTIN/EAN: 4007922005324
WEEE-Reg.-Nr.: DE 34716369

With BRESSER, you can enjoy a smooth introduction to the vast world of astronomy. Our detailed information ("Telescope Guide") provides valuable tips for beginners—but even experienced astronomers can use the information we provide (e.g., tables for the geographical latitude of all major world cities) as a reference.

Here is the table of contents of the comprehensive BRESSER Telescope Guide:

Sky Guides von Bresser

Der Sky Guide bietet umfassende Informationen zu Sternbildern, Planetenpositionen und astronomischen Ereignissen – ideal, um Ihre Beobachtungen zu planen und noch tiefer in die Astronomie einzutauchen. 
Besuchen Sie den Guide direkt hier, um das Beste aus Ihren Beobachtungen herauszuholen!
Product information "EXPLORE SCIENTIFIC HR Coma Corrector"
After three years of testing and refining we are extremely proud to present the new Explore Scientific High Resolution (HR) Coma Corrector. This corrector is a class of it´s own - it is fully functional for visual use and expands the focal length by only 6%! The Explore Scientific Coma Correktor is delivered as a complete set together with a rotating helical focuser with laser-etched scale, so you get a full package: corrector, adaptor to T2 (M42x0.75mm), adaptor to M48 (M48x0.75) and the helical focuser for visual fun. This coma corrector really is "high resolution" - it deliveres a visual polystrehl performance of 0,98 at f/4 and 0,96 at f/3! So it can stay in the telescope - and you will not only enjoy a tack-sharp Jupiter, but aslo sharp and defined moons in the future! What this means in terms of performance is shown in the three pictures with the graphs - the sharpness increase in those comparisons with and without corrector are stunning (examples are 400mm f/4, f/3,5 and f/3). Please notice: These graphs are for FLAT FIELD! You will get this performance without refocussing! Diameter of the field is 30mm - it doesn´t make sense to increase this with 2" and fast optical systems. Length of the 2" corrector barrel is approx. 85mm and it can be used with almost all 2" focusers on the market. To use the HR Coma Corrector visually, you need to have at least 32mm spare inward travel at your focuser, while the focus is on the same plane as the focusers end. Photographically there is no problem - the HR Coma Corrector shifts the focus outward by about 35mm, so that you will have no problem in achieving focus, when you are able to focus your camera without the HR Coma Corrector.


FEATURES

  • Eliminates coma, field-curvature and astigmatism in newtonians 
  • Diffraction limited performance on axis and in the field 
  • Flattens the field 
  • Works for very fast systems down to f/3 Four-lens construction 
  • Can be used with almost all 2" focusers on the market 

SCOPE OF DELIVERY 

  • High Resolution (HR) Coma Corrector 
  • Adaptor to T2 (M42x0.75mm) 
  • Adaptor to M48 (M48x0.75) 
  • Helical focuser
Colour: black
Material: Aluminium

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