Bresser Astrophoto Tracking Mount & Polar Wedge Tripod

Do you already own a photo camera and would like to create impressive pictures of the night sky with the help of the long exposure or even make time-lapse pictures with little effort ?

The BRESSER photo mount is the ideal base. This mount is particularly well suited not just for beginners in astrophotography, but also the experts will swear by this compact and easy-to-use mount which automatically compensates for the natural rotation of the earth. The built-in tracking motor rotates the saddle-mounted camera precisely against the earth's rotation and thus the stars remain round even during long exposures.

Which cameras are basically suitable for use with the BRESSER photo mount ?
All cameras with ¼ inch (6.3mm) tripod connection thread and bulb length" B "for long exposure are suitable.

The BRESSER photo mount is designed for a camera with lens of max. 2.5 kg total weight to carry and track. Large aperture, wide-angle lenses are ideal for the beginning, because the requirements for tracking accuracy accumulate with increasing focal length and exposure time. Subsequently, a shot with wide-angle lens can be exposed for up to several minutes and the stars will remain round without showing tracking errors. For longer focal lenght lenses - for example, using a 200mm telephoto lens - the polar alignment of the photo mount must be exactly right. But thanks to the high precision optical polar alignment scope, this can done quickly and effectively.

After setting up the light and compact photo mount, simply set the approximate latitude (pole height) to the polar wedge's altitude scale and aim at Polaris through the illuminated pole finder scope. Then mount the camera with the photo lens using the quick-release plate on the supplied ball head. With the ball head, the camera can be aligned and determined at any time on any section of the sky. As soon as the tracking motor is switched on, long-time exposures can begin immediately. With practise, this set-up can be achieved in under 5 minutes ...

The tracking is carried out by a precise stepper motor, which can also be moved via the hand box with switchable low 2x or high 32x speed in forward and reverse, allowing the target area of sky to be adjusted very precisely. Low power consumption allows up to 50 hours of operation with just one battery charge.

The height-adjustable stainless steel tripod with polar wedge is an extremely stable base for the BRESSER photo mount. Thanks to the integrated circular level in the tripod head, the leveling of the photo mount is child's play. If you already own a sturdy photo tripod with a video tilt head you can mount the photo mount's head directly to this with the base's 1/4 inch & 3/8 inch photo thread holes. The pole height (latitude) can then adjusted by the video tilt head. The photo-mount and the tripod with polar wedge are also available separatelyshould you want to buy either separately - the product numbers of these are 4964111 and 4964112 respectively.

FEATURES

Equatorial Photo-Mount

Adjustable stainless steel field tripod with polar wedge and bubble level

Automatic siderial tracking against the Earth rotation

Handbox to control the tracking motors (2x/32x)

Suitable for northern and southern henisphere

Optical pole finder scope with illumination unit included

Ballhead with quick release saddle plate and 1/4" Photo thread for Kamera mounting

Photo-Mount with 3/8" threaded bolt for ballhead mounting

Photo-Mount with 1/4" und 3/8" inner threads for tripod mounting

High precision stepper motor with helical gear for accurate tracking

Large screws and handles for easy usage at night

Battery operation or stabilized power adapter (optional acc.)

Battery life: up to 50 hours

Power connector at handbox: 6 volts DC jack 5.5/2.5mm (positive pole at center pin)

Weight Photo-Mont with ballhead: 1.0 kg

Weight tripod with polar wedge: 3.5 kg

Load capacity of Photo-Mount: up to 2.5 kg

Height of camera sattle plate max. 140 cm

WHAT'S IN THE BOX:

Astrophoto Mount head

Tracking motor with Handbox

Ultra-stable stainless steel field tripod with bubble level

Ballhead with quick release saddle plate

Pole finder scope with illumination unit

Battery compartment 6 volts with case (no D-batteries included)

Manual

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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