Avalon M-Uno


The M-uno Fast Reverse telescope mount is a portable single arm fork mount devoted to deepsky imaging in the capacity range up to 20 kg (44 lb).

Please note that we are unable to ship Avalon Instruments products outside of the Middle East and North Africa Region, please refer to the Avalon Instruments website for an authorized re-seller for your part of the world, if no re-seller is available in your part of the world, you can order directly from Unitron Italia. All Avalon Instrument Products are special order from the manufacturer and are not kept locally in stock but are readily available from the factory.

إن هذا المنتج هو حامل تلسكوب إستوائي  بذراع واحد مكرس للتصوير الفلكي   بقدرات عالية حيث تتراوح حمولة عدة التصوير إلى 20 كيلوغراما. هذا الحامل يسمح بتصوير الأجرام الفلكية لأنه يتابع الأجرام بدقة ويمكن التحكم به من حلال المحمول أو الحاسوب عن بعد. صمم هذا الحامل في أفضل المصانع في ايطاليا من قبل شركة دال ساسو ريالا، وهي شركة مع أكثر من 30 عاما من الخبرة في مجال ميكانيكا الدقة العالية

Controller type

StarGo BlueTooth is slightly cheaper but not compatible with iPhones and iPads. It works very well with Android Phones. StarGo with WiFi model works with both

Tripod *

Choose Which tripod option you would like with your mount

Counter Weight Bar

This accessory is needed for installing counterweights on the M-Uno, It comes in two sizes. Choosing the longer size allows you to use the M-Uno with less counterweights.

Mount Counterweights

Counterweights are needed to balance the telescope on your mount. Choose the amount according to the Weight of the telescope and all accessories. Type the number of counterweights you need here. If you don’t need a particular weight type 0 for that weight. The M-Uno uses far less counterweights than a traditional German equatorial mount. Please note that if you use a declination extender, you will need counter weights.

This must be a number!

This must be a number!

Declination Axis Modular extender

This modular extender allows you to raise your telescope higher on the declination axis allowing longer OTA configurations to clear the base of the fork mount. For example, if you are using a long refractor or an SCT with a focal reducer and large CCD, you are likely to need this accessory. Please note that we advice you purchase counterweights if you buy the extender

External Polar Scope bracket

This highly recommended accessory allows you to use the polar scope on the M-Uno even with a telescope mounted on the saddle.


M-Uno Fast Reverse

A Mount for deepsky imaging without the needs of meridian flip

The M-uno Fast Reverse telescope mount is a portable single arm fork mount devoted to deepsky imaging in the capacity range up to 20 kg (44 lb).

The M-uno design was developed on the basis of the linear fast reverse, making use of the same technical concepts:

• Fast Reverse technology
• Computer aided design (CAD)
• High quality manufacturing with digital control 5 axes CNC machines (CNC + CAM)
• Absolute quality materials: Anodized aluminium from milled monobloc, stainless steel components and screws, brass components, techno-polymers

Advanced performance
As for the Linear, the motion transmission technology is based on pulley-tooth belt without play, while its peculiar geometry makes easy the imaging at the meridian crossing regardless the typical problem affecting the classic German Equatorial Mounts, for both the risk of touching the tripod and the need of waiting for the object cross the meridian.

With The M-Uno Mount, An Object Can Be Finally Tracked All Night Long!
Moreover, considering that at the meridian the sky is less subject to light pollution and to atmospheric turbulence, the M-uno is the ideal tool to shoot deepsky objects in their best conditions, close to the meridian, especially when the time is short and the sky is not so dark and clear.

The M-uno is mainly designed for astroimaging with high focal length catadioptric tubes (such as SC-Maksutov, RC, SC cameras, Cassegrain, DK, etc) up to 10″ aperture and 20 kg (44 lb) weight, according to the tube length. It is possible to use the M-uno with Newton optics (for example 8″ f4) and even with short refractors (400-500 mm), with a piggyback or parallel guidescope.

To allow the use of refractors with length exceeding approximately 500 mm, an optional accessory has been realized allowing to distance the telescope from the mounting flange in order to allow the passage over the RA axis. It is also available a special kit that, in addition to distance the telescope from the mount, allows the housing of a small guidescope obtaining also a better telescope balancing. With this configuration it could be necessary to perform the telescope inversion at the meridian passage in the case of the telescope striking the tripod.

 However the larger overhang of the single arm system will allow a greater pointing angle compared to the classic German Equatorial Mounts.
Another M-uno basic advantage is that it doesn’t need neither counterweights, nor the bar. Its declination axis can be quickly balanced like in an equatorial mount, while, for the RA axis, it is possible to fix the arm on three possible positions and to make the fine balance using a very small counterweight. The M-uno mount, as well as the LINEAR, is equipped with the super tested, simple to use and inexpensive Synscan control system. The M-uno total weight is only 14.9 kg (11 lb) and it is provided of a comfortable handle for easy transportation. With these features, in terms of lightness and ease of transport, the M-uno ranks at the top of the mounts with capacity up to 20 kg (44 lb).

The total M-uno weight is less than the LINEAR weight, which exceeds 20 kg (44 lb) considering counterweights and bar.

Pulleys and toothed belts, zero backlash!

This choice has allowed to obtain several advantages: a really steady motion without play (no backlash) and sudden peaks, factors of paramount relevance for long guided exposures and during high magnification visual observations. These features are of particular relevance especially for the declination axis motor that can now quickly reverse the motion without breaks to recover the plays: from here the mount name FAST REVERSE. The toothed belts used in the M-uno have the structure made of special material with steel strands to avoid any deformation, elongation and stress, much better than those used in the automotive engine distribution system (which are generally made of rubber with nylon strands). Considering that the service time for the automotive toothed belts is around 100.000 km (60.000 miles), assuming a medium regime of 2.000 rpm and thermal stress from 0 to 90°C (30 to 195 F) in a few minutes, we can think that the life cycle of the M-uno toothed belts will be extremely long !
It is important to underline that in the gear-worm systems the motion transmission has only one tangent point of contact, any errors on each of the two components will, sooner or later, result into a tracking errors.
On the contrary, in the pulley-toothed belt system, no direct contact occurs between the pulley and the motion is transmitted by the belt engaging from 50% to 90% of the girth surface. Consequently any error, eventually present, is averaged among the cogs, moreover soft, greatly reducing the tracking error.
These features allow the M-uno to perform guided exposures up to 20-30 minutes with pinpoint stars even with optics of 2-3 meters of focal length.

No wear, no frictions!

No wearing effects since no relevant frictions occur. In fact, all the pulleys and the axes rotate on roller bearings, 13 for the RA axis and 13 for the DEC axis that allow to reduce the total friction almost to zero.
Another significant advantage of very low frictions is that the risks of motor slipping during GOTO operation is virtually null.
On the contrary, it is well known the difficulty to regulate the coupling between gear and worm in the conventional mounts. If the coupling is tight the motors can stuck with consequent loss of the position, if the coupling is too loose the plays increase.
On the other hands, the absence of significant play in the M-uno makes the initial calibration of guiding CCD quick and easy.

No lubrication, no maintenance!


Since there are no gears, there is no need of periodical lubrication of the internal components and therefore the maintenance is extremely reduced and limited to the esternal cleaning.
In short, the M-uno FAST REVERSE mount is ideal for those travelling astroimagers seeking for long deep sky exposures, even with high focal lengths, without the troubles of meridian crossing with an excellent value for money. Obviously the particular characteristics of the M-uno make it ideal even for use in a permanent location, especially with remote control.

Technical Data
Type German equatorial mount
Weight 14.9 kg (11 lb) , without counterweight and bar
Capacity 20 kg (44 lb) in imaging, 25 kg (55 lb) in observing
Transmission four-step reducer via pulley-tooth belt system on ball bearing, with no plays on the axes
Tracking error +/- 5-7 arc seconds, in average
Construction Material Anodized aluminium, worked out from single blocks with high precision CNC machines
Motion system Pulleys made with special glass fiber polymer and high precision tooth belts
AR Axes Heavy duty steel, diam. 35mm; 2 conical roller bearings, diam. 62mm + 1 roller bearing diam. 72mm + 2 roller bearing diam. 45mm – On bearings clutch system
DEC Axes Heavy duty steel, diam. 35mm; 2 conical roller bearings, diam. 62mm + 1 roller bearing diam. 72mm + 1 roller bearing diam. 45mm – On bearings clutch system
Polar Finder Skywatcher model (optionally Losmandy model)
GOTO system StarGO Control System
Counterweight bar Not applies, since no counterweights are required
Counterweight Not applies, since no counterweights are required
Scope plate Losmandy, 3″ (75mm), dovetail, single knob with 2 tightening points
Warranty 2 years from the purchase date, extended to 5 years for the transmission system


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