Askar introduced M54 off-axis guider for astronomy enthusiasts to achieve better guiding effect. The prism of Askar M54 OAG is 10×10mm, which can not only collect more light, but also make it easier to capture the targeted star and realize automatic guiding.
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Prism area 14 10mm.
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Moving to ONAG so selling the OAG. It was bought from second hand back in 2021. It is missing some extension barrels, buy I never needed them for my Celestron EdgeHD 11, my countless adapter and those that come with my cameras plus the filter drawer is all I ever needed. Please see the manual picture with the red crosses indicating the missing ones. What I include, and I did always use is the large STC adapter for ONG, usually cost around £30. I will post anywhere in GB for NI will have to pay the difference in postage, buy very happy to post there too. Postage included.
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1 x Off-Axis Guider Body. M48 filter drawer with magnetic quick-release system. Used carefully once and works flawlessly. 1 x M42-Male Adapter. 1 x M48-Male Adapter. 1 x M48-Female Adapter.
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The result: better astroimages with pinpoint round stars. Find the most accurate way to guide with the Celestron Off-Axis Guider. - Fixed-orientation helical focuser for easy, smooth and accurate autoguider focus.
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eBay