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Bresser Full HD Deep Sky Camera & Autoguider 1.25"

Bresser Full HD Deep Sky Camera & Autoguider 1.25''
Price:  £270.00(Inc. 20% VAT)

Model:  4959050
Brand:  Bresser



Generally In Stock, Please Confirm Before Ordering

2 Year Warranty On All New Items
(Excluding Batteries & Globes)

One of the main characteristics of the new back-illuminated SONY IMX290 CMOS sensor in the Bresser Full HD Deep-Sky Camera & Guider 1.25", is the high sensitivity to light which makes it possible to also capture deep-sky objects without active cooling. SONY has increased the quantum efficiency up to 77% at 533nm wavelength which is much better than many rival CMOS sensors could achieve in the past.

The camera's forte is both Planetary, Lunar and Solar high speed imaging - and long duration deep sky astrophotography as well. At full 1936 x 1096 resolution, the Bresser Full HD Deep-Sky Camera & Guider can film at 15fps and can go significantly higher than this when the camera's resolution is reduced to the central area of the chip. For longer duration imaging, the maximum exposure time can be set to a generous 16 minutes. There is no IR cutoff filter in front of the sensor to ensure that the maximum amount of IR/Near IR wavelengths get to the chip, increasing sensitivity, particularly on hydrogen rich objects. However, when imaging the Moon and the brighter planets, the use of an IR cut filter, such as the Revelation IR Filter would be recommended.

This camera is provided with camera control software, though is also compatible with a large number of free and paid for camera control programs.

In addition to its use as an imager, autoguiding is also a simple process with this camera. Connect this camera with the built-in ST-4 port direct to your equatorial mount and use the camera to guide the mount with many of the popular autoguiding programs available. The sensor's high sensitivity ensures you'll always have a suitable guide star available, even at short exposure times. An industry standard ST-4 connecting cable is also included.

You can use this camera with any guiding-telescopes or off-axis-guider which accept a 1.25 barrel, 1.25 filter thread (M28.5x0.6) or c-mount adapter thread (1x1/32).


This is not a stand-alone guider-camera. You always need a Windows 7 / 8 / 10 computer for taking pictures and for autoguiding.

The autoguider software is not included. You can use PHD Guiding, Guidedog, Metaguide, Guidemaster (Freeware) or AstroArt, MaxIm DL (chargeable).




Camera type: BRESSER GPCMOS02000KPA colour
Sensor: SONY IMX290 CMOS colour, back-illuminated
Image and video size: Full HD 1936 x 1096 Pixel (video 15 FPS)
Native sensor size in pixel: 1936 x 1096
Exposure times: 66s bis 16min
Binning: YES , 2x2
Megapixel: 2.1 MP
Sensor size in mm: 5.6 x 3.1
Pixel size: 2.9 m x 2.9 m
Bit depth: 8/12 switchable
ST-4 compatible autoguider: YES
CNC machined housing made from Aluminum
Protection strap at camera housing
Camera barrel diameter: 1.25" ( 31.7mm)
Camera connecting thread: C-Mount + 1.25" filter thread
Computer interface: USB 2.0
Extension tube 1.25" included
No IR cut filter installed
Operating system: WINDOWS 7, 8 and 10
ASCOM driver included

Field of view for various focal lengths in mm (listed in arcminutes):

400 mm - 48,2x 27,3
500 mm - 38,6x 21,8
600 mm - 32,1x 18,2
700 mm - 27,5x 15,6
800 mm - 24,1x 13,6
900 mm - 21,4x 12,1
1000 mm - 19,3x 10,9
1250 mm - 15,4x 8,7
1500 mm - 12,9x 7,3
1750 mm - 11,0x 6,2
2000 mm - 9,6x 5,5

What's in the box:

Full HD Camera
C-Mount adapter
USB 2.0 PC connecting cable with 200cm length
Interface cable for ST-4 Autoguider port with 150cm length
Dust cap for camera barrel
Software CD

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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

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.

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


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Rother Valley Optics Ltd
Rother Valley Optics Ltd