DWARFLAB Dwarf II Smart Digital Telescope - Portable, Ultralight, and Packed with Advanced Features for Astronomy Star Parties, Birding, for Adults and Kids, Beginners and Advanced Players (Classic)

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Thats enough philosophising for a Bank Holiday and, besides, I suspect the 90 day monsoon is about to hit SW England… It may not be the finest smart telescope around, but if you can get a good second-hand price (Unistellar no longer sells this model) then it’s worth considering because it still offers incredible images of faint galaxies, nebulae and star clusters despite light pollution. Since it’s a reflector telescope it will occasionally need collimating (see below).Read our full Unistellar eVscope review. What is collimating?

Not good for planetary imaging: The short focal length does not lend itself to planetary photography. Deep sky astrophotography is its specialist field. Unlike some of the best telescopes for astrophotography, smart telescopes are easy for beginners to use. They also use cutting-edge astrophotography techniques, to locate faint objects in the night sky and then take long exposure images of them, merging one on top of the other to remove noise, battle the problem of light pollution and improve the image quality. The Classic edition includes a DWARF II, a carrying bag, a tripod, a replaceable battery and a 64GB microSD card.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.

There's a rumour that DwarfLab will be selling a 2x telephoto lens but I don't know how true that is. It would help with things like M57 which is quite small in the field of view. I understand that Dwarf III is also in the pipeline but if that happens I hope the developers will continue to support Dwarf II - I think they will, they seem very customer orientated. 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 won’t be winning NASA APODs or Astronomy Photographer of the Year with the images, but neither would you with any of the more expensive smart telescopes.

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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.

Please be aware that The Widescreen Centre cannot be held responsible for any postal or third-party delays that may occur. We are committed to providing a reliable and efficient delivery service for our valued customers. 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. A great way to see if collimation is the problem is to point the telescope at a bright star and adjust the focus so that the star is out of focus and showing as a big blob. Look closely and you will see a bright outer ring surrounding a dark central disc. If the dark disc is not in the center of the bright ring then the optics are not aligned and you need to collimate.If you are looking for a traditional astronomical observing experience, a regular telescope like a large dobsonian would be best for you. The shape of the DWARF II is special. Because we use a periscope structure to lower the center of its gravity and enhance its stability. This structure makes DWARF II look different from other telescopes.