Bresser Slider Binocular Mount Without Tripod

Revolutionary design for unprecedented comfort in binocular viewing - at day and night; enables steady images and fatigue-free viewing

Slider binocular mount without tripod
Enables comfortable and fatigue-free binocular observation
Suitable for landscape and sky observation
Shake-free and steady images at day and night
Almost infinitely rotatable and swivelling cardanic mount head
Supports binoculars and telescopes up to 3.5 kg weight
Various observer positions are possible: standing, sitting and lying down
Also a practical alternative to a photo tripod for wheelchair users
Adjustable viewing height from approximately 30 cm to 170 cm
Precise small series production - manufactured in the EU (Hungary)

The BRESSER Slider Binocular Mount, with its revolutionary design, offers unprecedented comfort for binocular observation - during the day and at night
Thanks to the variable extension length of the two support rails (crossbars), the cardanic mount head and various adjustable slip couplings almost all binocular positions can be selected easily. Afterwards, the binoculars remain in their respective position thanks to the counterweights. During observation, it is usually not necessary to touch the binoculars. Whether you want to observe standing up, sitting on a swivel chair or lying down on a mat or bed, everything is possible. For wheelchair users the mount is also an interesting alternative to normal tripod solutions, where usually one tripod leg is always in the way.

A steady image despite large binoculars and high magnification
Especially when observing for a long time, even medium-weight binoculars weighing 500 grams or more and moderate magnifications of 10x or more make life difficult. Already after a short while the pictures blur and the arms get tired. Certainly, a high photo tripod can bring a significant improvement. But this solution is very limited in terms of the binoculars’ movability and the position of the observer.
The BRESSER Slider Binocular Mount offers far more possibilities. Almost all desired binocular positions can be reached effortlessly. The patented design, with 2 counter-moving support rails (crossbars), is guided on special linear roller bearings inside the mount head with zero play. This allows the observer to vary the extension length as desired with little muscle power. The sliding resistance can be infinitely adjusted using 2 adjusting screws. In the middle of the slider mount’s centre of gravity, there is an axle with adjustable slipping clutch for the tilting and rotating movement. All bearings operate with absolute precision and backlash-free. For quick levelling, there is even a 30 mm fluorescent circular bubble in the base of the mount, which is easy to read even in the dark.

Cardanic mount head
The cardanic mount head works like a ball head. However, it offers a significantly higher load-capacity and more stability. Here, too, the sliding resistance of all moving parts can be adjusted to the user’s specific needs. The mount head offers several mounting holes for mounting a binocular holder via 1/4-inch photo screw or a standard GP prism clamp for mounting small telescopes. In addition, there are various holes on the side cheeks of the mount head for further accessories such as red light reading lamps, smartphone holders for the use of sky apps or LED viewfinders for quick sighting of celestial objects.

Counterweights
Several counterweights enable the exact balancing of the binoculars or telescope. Two counterweights of each 2.5 kg, 1.25 kg and 0.5 kg are included in the package and can be attached to the rear end of the mount on the mounting bolts on both sides. With the 2 included spring clamps the weights are secured on the bolts. Instead of the counterweights, a filled sandbag can also be attached to the existing mounting hook. This reduces the transport weight for planned excursions.

Suitable for use with binoculars of up to 3.5 kg weight
The BRESSER Slider Mount can be used with binoculars of up to 3.5 kg weight. But it is also a real help for obtaining blur-free images with much smaller binoculars during long-term observations. It is mounted with an optionally available binocular tripod adapter, which is attached to the mount head with a 1/4-inch photo thread screw.

Also highly recommended for compact refractor telescopes
Install an optionally available standard GP prism adapter on the mount head and use your travel telescope in a completely different way: as a high-quality spotting scope for landscape and sky observation.

Tripod adapter
The matching tripod adapter for using the optionally available BRESSER stainless steel Tripod ST-3 (item no.: 0114310) is already included in the slider mount’s scope of delivery. It converts the standard large 3/8-inch photo tripod thread (internal thread) in the base of the slider mount into a metric M10 thread. This means that after removing the adapter, a stable standard photo or video tripod with 3/8-inch mounting screw can also be used.

GETTING STARTED VIDEO: https://www.youtube.com/watch?v=AhJm3Cl1e9I

FEATURES

BRESSER Slider Binocular Mount without Tripod
Enables comfortable and fatigue-free binocular observation
Suitable for landscape and sky observation
Shake-free and steady images at day and night
Almost infinitely rotatable and swivelling cardanic mount head
Supports binoculars and telescopes up to 3.5 kg weight
Various observer positions are possible: standing, sitting and lying down
Also a practical alternative to a photo tripod for wheelchair users
Adjustable viewing height from approx. 30 cm to 170 cm (when using the BRESSER tripod, item no. 0114310)
Dimensions when fully assembled: 125 x 35 x 180 cm (when using the BRESSER tripod, item no. 0114310)
Total weight mount head incl. accessories: 14.5 kg
Weight of mount head: 6 kg
Large 30 mm fluorescent circular bubble in the mounting base
Mounting holes for further optional accessories available
Several balance weights include: 2x 2.5 kg, 2x 1.25 kg, 2x 0.5 kg
Adjustable friction clutches on all movable axes
All surfaces high quality painted, powder coated or anodised
Precise small series production - manufactured in the EU (Hungary)

SCOPE OF DELIVERY

Slider mount (binoculars + tripod not included)
Tripod adapter 3/8 inch to M10 thread
Balance weight 2.5 kg (2 pieces)
Balance weight 1.25 kg (2 pieces)
Balance weight 0.5 kg (2 pieces)
Locking device for counterweights (2 pieces)

Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or sales@rothervalleyoptics.co.uk.

The delivery times for most items is 1 - 2 days but again, please double check stock levels on important orders before placing an order via the website.

The delivery costs for courier next day are for mainland UK only. If you live in the Scottish Highlands/Islands, Channel Islands or Northern Ireland, then a shipping surchage will apply. please contact us for prices. Smaller items can still go 1st class via Royal Mail.

Please note that if you are wanting to take advantage of our Saturday and Sunday timed services or next day pre 12 or pre 10:30 services, you MUST check that the stock is here at the shop before placing orders. Also, orders using the Saturday and Sunday services must be placed before 1pm the previous working day. Also, please remember to check that the stock is here at the shop before placing orders. If the stock is not at the shop, we won't be able to ship on any of the timed services. 

Please note International customers will need to contact us for a shipping price prior to ordering via the website. We don't ship all items internationally. It is at our discretion what we ship outside of the UK. This all depends on the size and weight of the items. Please get in touch with us for any postage costs. Please note we do NOT ship telescopes or heavy items outside of the UK. This is due to massive postage costs and problems regarding returns.

If you have any questions regarding stock levels or delivery, please get in touch.

Zygo Interferometer Testing For ED Refractor Telescopes!

We are extremely pleased to announce our Zygo Interferometer is now installed and ready for use! Our experienced staff can test refractor lenses up to 120mm aperture and provide a comprehensive 2 page report showing the optical quality and Strehl ratio, plus much more information. We are using the very latest Zygo MX software to provide a more detailed report compared to other standard reports.

The interferometer is essentially a measuring instrument. Within the interferometer is a calibrated laser that is pointed through the optical test surface, then onto a high quality reference sphere, then back through the test subject then to an internal camera which gives us the measurement on the screen. From this, we can adjust the position of the test optic and the reference sphere to obtain a perfectly calibrated system. The more central the laser to the test optic and then on return, the better and more accurate reading and measurement we can take. This takes a lot of adjustment to get the best results from the optical surface. Once the measurement has been taken, we are provided with a series of results that show the optical quality of the surface plus other information. Continue reading for an explanation of the individual values and you can also see a test report that was done on one of our RVO Horizon 60 OTAs. 

We are offering certain telescopes with a Zygo test at an extra cost. Mainly ED doublets and triplets. All available telescopes with a Zygo test report are listed here. Just select Zygo Test Report from the drop down box at the top of the listing and we will test the optics in house and provide a full 2 page report with your scope. This will show you the optical quality of your telescope optics. We can also offer this service on your refractor telescope. Please get in touch for more details about this. 

At Rother Valley Optics, one thing we pride ourselves on is customer service and quality of our equipment. When we test your telescope, we will ensure that it is of the highest quality otherwise, we will reject the scope under our strict quality control and test another model for your peace of mind. One of the main values to look at when testing a refractor is the Strehl ratio. The higher this number, the higher quality lens you have. At Rother Valley Optics, we will guarantee the highest possible Strehl ratio for your telescope.  We will aim to provide 0.95 Strehl or higher on Takahashi, RVO Horizon, William Optics and many more! Generally, the higher the Strehl ratio, the lower the Astigmatism and Coma meaning a better image quality from your instrument. 

Other measurements such as the PV and RMS are important too. With these measurements, the lower the number the better as it shows less curvature on the lens. The flatter an optical lens, the better it will perform. The PV rating (Peak To Valley) is a measurement from the highest point (Peak) to the lowest point (Valley). From this we get the RMS (Root, Mean, Square). This is a similar figure to the PV and measured exactly the same way. The RMS is basically an average height difference from the PV so again, the lower the better. As you can see form the example below, we measured an RMS of just 0.027 wave which is a very good value.

We also measure the Power with our systems which is essentially the error from the reference sphere to the test optic. The reference sphere we use on our system is a very high quality sphere so the closer to zero the Power, the less error between the 2 elements thus ensuring a higher quality optical surface. 

You will also see some more values such as Astigmatism and Coma. Again, these are measured by the interferometer when we take measurements of the optical surface after adjustment. These are values which ideally would be at 0 but as our test optics are all curved lenses, there will always be astigmatism and coma present. The lower the number, the less of these aberations you will effectively see but with most refractors, you can buy field flatteners which will compensate for the coma anyway. The astigmatisms value is explaining the error between the symmetrical curvature of the lens. Basically, no lens will be perfectly symmetrical, the lower the astigmatism, the more symmetrical the lens surface is. 

Once the Zygo test report has been completed, the optical alignment is thoroughly tested and tuned to ensure they are spot on before they leave us. 

All available telescopes are on the website at the link below and ones we've tested already that are available straight away are also listed.

https://www.rothervalleyoptics.co.uk/zygo-tested-refractors.html

Here is an example of the test what we provide. This was a test on one of our Horizon 60 ED OTA's.

For any questions about this amazing new service, please either call 01909774369 or email sales@rothervalleyoptics.co.uk.

Are you interested in this product but would like to speak to someone with some more information? Simply fill in the form below and we will get back to you as soon as we can!

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