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
Product number:
0510330
EAN:
4007922005324
WEEE-Reg.-Nr.:
DE 34323861
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:
- 2. The View into the Starry Sky
- 2.1 Observing with the Naked Eye
- 2.1.1 Observing Constellations with the Naked Eye
- 2.2 Observing with Binoculars
- 2.2.1 Observing Planets and Moons with Binoculars
- 2.2.2 Observing Deep Sky Objects with Binoculars
- 2.2.3 Every Beginning is Easy
- 2.3 Observing with a Telescope
- 2.4 The Moon
- 2.4.1 The Moon Phases
- 2.4.2 The Far Side of the Moon
- 2.4.3 The Moon Map
- 2.4.4 Maria (Seas)
- 2.4.5 Mare
- 2.4.6 Craters
- 2.4.7 The Ray Craters
- 2.5 Observing the Solar System with a Telescope
- 2.5.1 Where are the Planets?
- 2.5.2 Planet Observation
- 2.5.3 The Position of the Planets Relative to the Sun
- 2.5.4 The Planets Introduce Themselves
- 2.5.5 Deep Sky Observation with a Telescope
- 2.6 Practical Observation Tips and Tricks
- 2.6.2 Tips for Optimal Observation Conditions
- 2.7 The Most Beautiful Objects Throughout the Year
- 4. Telescopes
- 4.1 The Telescope as an Observation Instrument
- 4.2 Optics
- 4.2.1 Refractor (Lens Telescope)
- 4.2.2 Reflector (Mirror Telescope)
- 4.3 Mechanics
- 4.3.1 Altazimuth Mount
- 4.3.2 Equatorial Mount
- 4.3.3 Drive Motors
- 4.4 Accessories
- 4.4.1 Eyepieces
- 4.4.2 Important Tips for Eyepiece Selection
- 4.4.3 Filters
- 4.4.4 Photographic Accessories
- 4.4.5 Other Accessories
- 5.1 Which Telescope for Whom?
- 5.1.1 Deep-Sky Observations
- 5.1.2 Observing Closer Planets
- 5.1.3 The Topic of Portability
- 5.1.4 Price Factor When Buying a Telescope
- 6. Useful Tables
- 6.1 Table for the Geographic Latitude of All Major World Cities
- 6.1.1 Observers in the Northern Hemisphere (N):
- 6.1.2 Observers in the Southern Hemisphere (S):
- 6.2 Lookup Table for Notable Stars
- 6.3 Getting Acquainted with the Universe - or: Distances in Space
Sky Guides by Bresser
The Sky Guide provides comprehensive information on constellations, planetary positions, and astronomical events – perfect for planning your observations and delving deeper into astronomy.
Visit the guide directly here to make the most of your observations!
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
SCOPE OF DELIVERY
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
| Batteries required: | No |
|---|---|
| Colour: | black |
| Extended warranty (years): | 10 |
| Material: | Aluminium |
Product and safety instructions
Manufacturer:
Bresser GmbH, Gutenbergstraße 2, 46414 Rhede
Contact:
www.bresser.de
www.bresser.de
Warning notes
- General safety instructions DANGER Risk of eye injuries! Never look directly at the sun or near the sun through this device. There is a risk of blindness! Children should only use the device under supervision. Keep packaging materials (plastic bags, rubber bands, etc.) away from children! There is a risk of suffocation! FIRE HAZARD! Do not expose the device especially the lenses to direct sunlight! The light concentration could cause fires. RISK of material damage! Do not dismantle the device! In case of a defect, please contact your dealer. They will contact the service center and may send the device in for repair. Do not expose the device to temperatures above 60°C!
- Never look at the sun through an eyepiece/telescope without a certified protection filter. A moon filter can never be used for solar observation. The moon filter is only suitable for moon observation. The solar filter must be mounted in front of the telescope opening, not at the eyepiece. Otherwise, the concentrated light beam through the optics will immediately destroy the filter foil, leading to severe eye damage, including permanent blindness.
- Never leave the optics unattended. Children and inexperienced adults could point the telescope at the sun without proper precautions and lose their eyesight.
- Do not expose the device to high temperatures.
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Longer focal length and less light obstruction
Offers an even sharper view with high contrast
Very high quality Hexafoc focuser with 2,5" free inner diameter
Diffraction limited optics with parabolic main mirror
8x50 straight through viewfinder with reticle
Optimized finder socket for comfortable use
Cradle rings with handle and integrated piggyback camera holder (1/4 thread)
Smartphone adapter for celestial navigation included
Dovetail plate with stainless steel rail
50,8 mm (2'') to 31,7 mm (1,25'') adapter with integrated T2 thread (T2-adapter ring for your camera is needed)SCOPE OF DELIVERYOptical tube
26 mm Super Plössl eyepiece 31,7 mm (1.25")
Integrated 31,7mm and T2 adapter
Prism rail with stainless steel clamping surface
Adapter for 50.8 mm (2") eyepieces
8x50 optical viewfinder
Rotatable star map
Aperture solar filter
Tube clamp with handle and camera holder
Smartphone adapter for celestial navigation
Software Stellarium (via download)
Available
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EXPLORE SCIENTIFIC 100° Ar Eyepiece 14mm (2")
€291.00*
€439.00*
(33.71% saved)
These eyepieces with their huge apparent field of view not only gave the
observer a panoramic visual experience, but they relax the eye so the
observer could pay attention to subtle details for extended periods.
These ultra-wide angle eyepieces played a critical role in the military
for aiming at targets, and their long eye-relief counterparts helped
reduce eye injury from recoil.Each 100° Series Argon-Purged
Waterproof eyepiece is internally sealed and purged with inert, dry
argon gas to prevent internal fogging, to halt the intrusion of fine
particulates and fungus. This also maximizes the life of the internal
coatings.To make sure, every 100° eyepiece is tested by submerging them down to 1 meter of water for 30 minutes.All 100° Series eyepieces are fully multi-coated and edge-blackened to produce maximum contrast.
Available
