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The focal length of 1250mm divided by the aperture of 250mm gives an f ratio of 5. This means that you will see some coma, especially in very wide angle eyepieces. Anything up to around 70° I find perfectly acceptable.
I have the exact same telescope (as do a few others on here) and I'm completely satisfied with it. The OTA is biggish and the whole system not exactly light weight but still manageable. The views are outstanding.
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