Page 92 - BBC Sky at Night - September 2017 UK
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92 FIRST LIGHT SEPTEMBER



         FIRST LIGHT




           built-in 2-inch version. The mechanism’s design
         >
         means that anything locked in place will be
         perfectly on-axis with the main telescope.
           The grip-ring is chunky and usable even when
         wearing gloves, but we found that the system tends
         to rotate the inserted equipment during tightening.
         The focuser itself allows full 360° movement, so
         this isn’t too much of an issue. We also found that
         barrels with recessed sections needed special care,
         because the reduced diameter of the recessed ring
         didn’t always grip properly with the 1.25-inch adaptor.
         Cancelling creep
         A dual-speed hybrid drive focuser merges Crayford-
         style friction focusing with the direct action of a                                Excellent stars were visible
         rack and pinion focuser, and gave us one of the best                                    across this image of
         focuser experiences we’ve ever had. The movement                                  NGC 7000, shot with a full-
                                                                                              frame unmodified DSLR
         was smooth, responsive and direct, with the 1:11
         fine focus knob producing no backlash. The focuser
         design eliminates the creep that sometimes occurs   This is a great grab-and-go scope with some nicely
         when using a heavy camera at a steep angle, which   thought out features. It is supplied with a set of Prima   SKY SAYS…
         can cause the focuser to extend. We couldn’t budge   Luce Universal System (PLUS) tube rings for mounting,   Now add these:
         it even when reasonable manual force was applied.  but you’ll also need a dovetail. Its short focal length   1. Canon EOS
           Using our own diagonal and eyepieces, the    isn’t particularly demanding in respect of its mount,
         Airy APO 65F delivered high-contrast views free   unless you intend to use it for seriously long exposures.   700Da astro-
         from any colour fringing. The bright gibbous   Biased towards wide-field, low-power views, this is a   PRGL!HG"FRROHG"
         Moon, viewed at 84x magnification, appeared   scope best suited to stunning deep-sky vistas. S  DSLR camera
         beautifully detailed. We could make out the                                          2. PrimaLuceLab
         6km-diameter crater Hadley C quite convincingly,   VERDICT
         but the nearby Hadley Rille escaped us. At low                                       (DJOH"&RUH"'6/5"
                                                    BUILD AND DESIGN              +++++
         magnification, we were delighted to see the Moon                                      FRQWURO"XQLW"
                                                    EASE OF USE                   +++++
         and stars visible in the field of view. With a 20mm                                   3."2SWRORQJ"
                                                    FEATURES                      +++++
         eyepiece giving a magnification of 21x, it was                                        L-Pro Max
         wonderful to sweep along the Milky Way’s rich    IMAGING QUALITY         +++++
         star fields. The stars really do look vibrant with    OPTICS              +++++       OXPLQRVLW\"!OWHU
         the scope’s superb contrast.               OVERALL                       +++++



                                                                                            OPTICAL TUBE

                                                                                    This scope is built like a tank. The 2.3kg,
                                                                                  350mm-long tube is made from aluminium,
                                                                                        and feels incredibly solid and well-
                                                                                     constructed. There’s an extending dew
                                                                                   shield and the inside of the tube has been
                                                                                         flocked to help increase contrast.



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