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Opticstar ED80S Gold - Dual Speed
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High Quality ED Refractor for Observing, Imaging and Guiding
To order this item outside the United Kingdom, please contact us.
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Opticstar ED80S Gold Dual Speed shown with optional finder scope and bracket.
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- High quality apochromatic refractor
- Lens type: FPL-53 Fluorite Doublet
- Coatings: Broadband FMC
- Lens diameter: 80mm
- Focal ratio: f6.25
- Focal length: 500mm
- Two speed (1:10) Precision 2" rotatable focuser
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- Robust, all-metal construction
- 2" to 1.25" eyepiece adapter included
- Metal knife-edge baffles
- Retractable dew shield
- Finder scope saddle
- Mounting rings (with 1/4" photo/c thread)
- Aluminium case (or quality nylon, padded travel-case)
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Opticstar ED80S Gold - Dual Speed
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Outline
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The Opticstar ED80S short-tube refractor is ideal as a portable scope and can be used
for observing, imaging or as a guide scope. It uses a high quality 80mm apochromatic
doublet that is fully broad-band multicoated to ensure maximum light transmission.
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The ED80S uses the higher quality FPL53 Fluorite glass rather than the FPL52 or FPL51 types.
FPL53 Fluorite glass suppresses chromatic aberration and is very well suited for short
focal lengths unlike the FPL52 or FPL51 types. The optical tube greatly benefits from metal
knife-edge baffles (not the plastic less effective step-type) that prevent stray light
outside the field of view from reaching the focal plane. Knife-edge baffles markedly
increase image contrast.
The dual speed Crayford type focuser, main tube and lens assembly are screwed into each
other for maximum rigidity, no peripheral screws are used as they can compromise the
rigidity of the telescope. This eliminates movement and ensures orthogonality.
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The ED80S Gold
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The ED80S refractor features a high quality precision 1:10 two-speed Crayford type focuser
with a 2" drawtube (1.25" adapter included), retractable metal dew shield, finder scope
saddle, CNC rings with 1/4" photo tripod threads, broadband fully multi-coated optics
and comes complete with a quality padded travel-case or alternatively with a hard
aluminium re-enforced padded case.
With a focal length of 500mm (f/6.25) the ED80S is also very well suited for wide field
astrophotography, guiding as well as for nature photography.
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The aluminium case.
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With a minimum total length of only 39cm and 80mm aperture the ED80S is the perfect travel
scope. All you need to start using the ED80S is a photographic tripod, diagonal and eyepieces.
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Opticstar ED80S Gold Dual Speed shown with optional finder scope and bracket.
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Focusing the Finder Scope
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Loosen lens-cell B by turning it anti-clockwise. Turn the locking ring A clock-wise.
Point the finder scope to a distant object, ideally a star, and bring the finder scope
to focus by turning lens-cell B clock-wise or counter clock-wise as required.
Once you have reached focus turn locking-ring A op.
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Focusing the finder scope.
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The ED80S Gold as a Spotting Scope
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The ED80S is ideal as a spotting scope due to is excellent optics and compactness. You
will need a prism diagonal to obtain a corrected view through the ED80S as with any
other refractor. With a prism diagonal the ED80S will focus down to 11 meters, with
the addition of a 2 inch extension tube the ED80S will focus down to 6 meters.
We highly recommend the padded case as this can by carried over one’s shoulder and
provides ample storage space for the ED80S and its accessories.
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The optics.
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| Specification of Opticstar ED80S Gold Dual Speed |
| Aperture |
80mm |
| Focal ratio |
f/6.25 |
| Objective |
FPL-53 Fluorite doublet |
| Optical coatings |
Broadband FMC (fully multi-coated) |
| Optical tube |
Internally anti-reflection coated, knife-edge baffles |
| Dew shield |
Retractable with metal screw-type cap |
| Finder-scope saddle |
Yes |
| Focuser |
Two speed (1:10) precision, rotatable, adjustable |
| Focuser adapter |
Accepts 2" and 1.25" eyepiece and diagonals |
| Focal tube travel |
70mm (etched markings, 1mm intervals) |
| Tube rings |
Heavy duty tube rings and dovetail with photographic 1/4" thread |
| Tube weight (inc rings) |
2.5 kg |
| Minimum tube length |
385mm with retracted dew-shield |
| Maximum tube length |
465mm with extended dew-shield |
| Tube diameter |
97mm |
| Frontal dew shield diameter |
110mm (screw-type aluminium cap) |
| Construction |
All metal construction |
| Tube design |
Suitable for use with bino-viewers |
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The deluxe padded carry bag is included as standard.
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Mounting on Schmidt-Cassegrain Telescopes (SCT)
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The ED80S can be mounted on top of SCT telescopes with the Farpoint mounting rings,
dovetail accessory adapters and dovetail plates as shown below.
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The Opticstar ED80S shown mounted on fork-mounted SCT telescopes.
A & C Farpoint Scope Rings 125mm and Dovetail Adapters.
B Farpoint Dovetail Plate for Meade SCT.
D Farpoint Dovetail Plate for Celestron SCT.
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Accessories
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The following table lists a number of accessories that may be of interest to some customers.
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| Vixen-Style dovetail accessories |
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Product Page |
Description |
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Opticstar 120mm Scope Rings and Dovetail, Vixen-style |
Collimating rings and dovetail to mount small refractors on mounts such as the
Celestron CG4, CG5, Sky-Watcher EQ3-2, EQ5, HEQ5, EQ6, Vixen mounts, etc.
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Farpoint 125mm Scope Rings and Dovetail, Vixen-style |
Collimating rings and dovetail to mount small refractors on mounts such as the
Celestron CG4, CG5, Sky-Watcher EQ3-2, EQ5, HEQ5, EQ6, Vixen mounts, etc.
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Farpoint Universal Dovetail Bar - Vixen-style |
Dovetail to mount refractors on mounts such as the Celestron CG4, CG5, Sky-Watcher EQ3-2, EQ5, HEQ5, EQ6, Vixen mounts, etc.
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Farpoint "Sure Grip" Saddle - Vixen-style |
Saddle for Vixen-style dovetails to mount optical tubes.
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Farpoint Side-by-Side Saddles - Vixen-style |
Two Vixen-style saddles and Vixen-style dovetail to mount two optical tubes on a single mount.
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Sky-Watcher Equatorial Mounting Plates |
Dovetails of various lengths, to attach optical tubes to Vixen-style equatorial mounts |
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Opticstar Mini Dovetail - Vixen-style |
Compact dovetail to attach small optical tubes to Vixen-style equatorial mounts |
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Opticstar Short Dovetail - Vixen-style |
Short dovetail to attach small optical tubes to Vixen-style equatorial mounts |
| Losmandy-Style dovetail accessories |
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Product Page |
Description |
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Farpoint 125mm Scope Rings and Dovetail Adapters, Losmandy-style |
Collimating rings and two adapters for Losmandy-style dovetails to mount refractors on mounts
such as the Celestron CGEM, GGE Pro, Losmandy, etc (dovetail plate not included, please see below).
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Farpoint Dovetail Plates for Celestron SCTs, Losmandy-style |
These plates mount onto existing holes on the Celestron Schmidt-Cassegrain telescope tube. |
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Farpoint Dovetail Plates for Meade SCTs, Losmandy-style |
These plates mount onto existing holes on the Meade Schmidt-Cassegrain telescope tube. |
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Farpoint Vixen Saddle to Losmandy Saddle Adapter |
Adapter to fit optical tubes with Vixen-style dovetails on Losmandy-style saddles. |
| Other accessories |
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Product Page |
Description |
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Opticstar 1.25" Extension Tube |
Used to achieve focusing with long focal length eyepieces where focal travel
on the telescope is limited.
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Opticstar 2" Extension Tube |
Used to achieve focusing with long focal length eyepieces where focal travel
on the telescope is limited.
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Notice
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We are constantly checking the accuracy of the technical data. We are prepared
to provide more detailed information on request. Technical data is subject to
change without notice.
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