It performs very well, handling winds up to 2 m/s without any issues on a standard CG-4 tripod. RMS is consistently below 0.8", which is just slightly below the upper guiding limit for this focal length and camera combination. However, I use a corrector from Quattro, which gives an actual focal length of 865 mm instead of 1000.
8 Oct, 2025
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How does the Umi17 perform with the 200PDS?
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