Bottletopburly Posted February 5, 2020 Share Posted February 5, 2020 Looking at astronomy tools guidesope suitability my new qhy1290 paired with my 130mm fl guidescope Nikon D5300 results for my 346mm scope is a ratio of 1.1 which I assume is well paired ,for the 200p fl 1000 it is 1.5 arc sec per pixel now is that to high or would I be better on the 200p using an OAG , what would be the likely error on the 200p be oval stars or is that ratio within normal limits , using the Qhy5l-11 on 200p ratio was 1.5 arc secs per pixel too using the canon 1000D , what is the main benefit of an oag is it to reduce tracking error to give tighter stars ?. Link to comment Share on other sites More sharing options...
+Graham Posted February 5, 2020 Share Posted February 5, 2020 Main reasons for using OAG. Both cameras are using the same scope so no difference in Focal lengths . Saves on weight as no guide scope needed. No flexure possible as could be possible when using a guide scope. Bottletopburly 1 Link to comment Share on other sites More sharing options...
Bottletopburly Posted February 5, 2020 Author Share Posted February 5, 2020 Thanks for clarifying @Graham Link to comment Share on other sites More sharing options...
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