Yes, it fits my old Canon EOS Rebel XT. . This is not a design flaw or anything like that. This is due to the construction of the telescope. For example, you need an adapter; https://www.amazon.com/gp/product/B019YV75Y4/ref=ox_sc_act_title_1?smid=A2399L2KV39QFR&psc=1
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