The optics

The Omegon ED apore fracturer stands for excellent optics, well thought-out design and high-quality mechanics. This very special telescope offers astrophotographers, visual observers or nature lovers a unique enjoyment of the starry sky and nature. Needle-sharp stars right into the edge regions of the field of vision are just as much a given as excellent mechanical precision.

The doublet apochromat

TrueColor glasses are installed in the lens of the Omegon ED Duplet Apochromats; the two-lens lens consists of a clever combination of OHARA FPL-53 and S-NBM51 glass. These are ED special glasses with high and low refractive index and best transmission properties. A special feature is the S-NBM51 glass, which is mostly used in apochromatic constructions of fluorescence microscopes. Your benefit: The optics show you the objects particularly sharply and with high contrast! For example, no Schmidt-Cassegrain telescope will show you the subtle differences that you see when observing planets.

The advantages of the carbon tube: Telescopic tubes made of carbon are particularly light and therefore perfect for smaller mounts. Carbon has a high level of inherent stability and durability with very low temperature expansion. This latter advantage is particularly useful for astrophotographers: the focus position remains stable - all night long.

Power linear extension with 1:10 reduction

A new improved focuser makes your observation and photography even more pleasant and precise. The Power Linear extension is based on the Crayford principle, but also has a rack as a guide rail. The combination of these two technologies makes the focuser precise and particularly strong. Diagonal mirror, a heavy eyepiece or a whole camera equipment: just connect whatever comes to mind.

It even supports accessories weighing up to 10kg, this is achieved by activating an additional lock screw. Even when applied with great force, the focuser no longer moves a millimeter: once you have found the focus, it no longer changes, even if you change the position of the telescope in the sky.

A 1:10 reduction offers you precise focusing - a must for astrophotography or high magnifications. Do you also take photos with full-format chips or do you plan to do so in the future? Even with full-format cameras, the objects are recorded without vignetting. The entire focuser is rotatable: loosen the locking screw and 360° rotation is possible.

Transport case included

The included aluminum case is an ideal storage place for the valuable optics. Ultra-stable, with carrying handles and metal fittings, it can easily withstand many shocks. Inside there are precisely cut foam shapes that hold the tube exactly as you inserted it.

The advantages at a glance:

    Multi-coating on all optical surfaces
    sophisticated aperture system to prevent reflections
    very high contrast and pin-fine star images
    Light and stable: tube made of carbon
    Carbon dew cap lined with felt
    Fine focusing: focuser with 1:10 reduction and protective cap

Special features:

    ED apo in doublet design with 80mm aperture and 500mm focal length
    360° rotatable 2" focuser
    Tripod adapter with 1/4" photo screw and mount for mounts
    Length extended 46cm, length retracted 39cm
    Weight OTA only 2.8 kg, complete weight with case 6 kg
    Suitcase external dimensions 56x20x32cm


The Omegon Field Flattener - How to achieve perfect image field flattening for your astrophoto
Many refractors and reflecting telescopes suffer from field curvature. A curved image in which the stars at the edge no longer appear as sharp, shiny pinpoints. Blurred slices are created. But the new Omegon Field Flattener conjures up flat and aesthetic astrophotos with needle-sharp stars right up to the outer edges of the image field.

This is how you get the problem under control...
Field curvature is a common optical defect that is not noticeable during visual observation or when photographing with small chips. However, if you photograph the sky with large chips or full-frame cameras, this error becomes clearly visible. Sure: you can cut off the edges of the images afterwards, but did you treat yourself to a camera with an expensive, large chip? This is much more elegant with the Fieldflattener.

Flat field across the entire field of view
With the Field Flattener you get an absolutely flat image across the entire photographic image field. The focal length remains the same when using the flattener.

Suitable for telescopes from f/4 to f/8
You can also use the Omegon Field Flattener on all refractors with an aperture ratio between f/4 and f/8.

M48 thread for better illumination
The Omegon Field Flattener has an M48 thread on both sides. This means you benefit from complete illumination. A T-2 thread with M42 would limit the light rays and therefore would not provide sufficient illumination for telescopes with a 2" focuser. Only with the M48 thread can you use the full light output.

Use additional accessories: 109mm back focus
This field flattener has a particularly large back focus of 109mm. This means: You need 109mm distance between the lens plane and the camera chip. An advantage for you: You can even add larger accessories, such as a filter wheel, a folding mirror or an off-axis guider. With matching spacer rings from the Omegon range, you can achieve the optimal distance - whether you use accessories in between or not. Please also note our adapter recommendation in the expert comment.

The advantages at a glance:

    Image field flattening for refractors
    suitable for telescopes from f/4 to f/8
    M48 thread for complete illumination of 2"
    Accessories can be used in between: 109mm back focus
    Huge multi-coating on the lens surfaces

Technical data
optics
type
refractor
Construction type
Apochromat
Opening (mm)
80
Focal length (mm)
500
Aperture ratio (f/)
6.3
Resolution power (arcseconds)
1.44
Limit size (like)
11.3
Light gathering capacity (-fold of a 7mm pupil)
130
Max. sensible magnification (x)
160
Tube construction
Full tube
Lens design
Duplet
Focuser
Construction type
Crayford
Connection (eyepiece side) (inch)
2
Rotatable
Yes
Reduction
1:10 fine drive
Mount
Construction type
OTA
GoTo control
no
Mount type
without mount
Accessories included
Eyepiece adapter
1.25" & 2"
Miscellaneous
Aluminum case
proofreader
Flattener
Generally
series
Per APO
Areas of application
Nature observation
Yes
Moon & Planets
Yes
Nebulae & galaxies
Yes
Astrophotography
Yes
Sun
not recommended (only with a suitable sun filter)
Recommended for...
Beginners
no
Advanced
Yes
observatories
no