(But of course it does not affect the photos.). It is no fungus. There is no haze on inside of the lens. There is no balsam separation. I will provide courteous and responsive service. I will look it for you.
eBay
Canon EF-S 55-250mm F4-5.6 IS STM Zoom Lens. - Model : Canon EF-S 55-250mm F4-5.6 IS STM Lens. -Canon EF-S 55-250mm F4-5.6 IS STM Zoom Lens. - Compatible Mount : Canon EF-S mount system. - Maximum shooting magnification: 0.29x.
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eBay
"CANON series from Japan. - Basic functions have been checked (or we will let you know if unknown), but we have not been able to test every single feature in detail. We will let you know if we have this type of issue.
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2 Objektivdeckel (vorne, hinten). Gehäuse: leichte Gebrauchspuren. Altbatterien gehören nicht in den Hausmüll. Sie sind als Verbraucher zur Rückgabe von Altbatterien gesetzlich verpflichtet. Canon EF-S 55-250mm 1:4-5.6 IS.
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Obiettivo Canon ef-s 55-250 is stm. Canon obiettivo EF-S 55-250mm f/4-5.6 IS STM. Funzione tilt / shift.
eBay
eBay