How much thousands km in height can fly a bird when i look inside of my teleskope with 17mm plossl and 7.5X digital zoom of my camera and i see a spot........?????????

The time was 11:25 am in greece that moment and the sun near to zenith.

Nothing bug on the lens. The lens is sticky with the plossl.

can i explain someone to me this think. I`m curious.

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