microscope distance adapter for digital kids microscope to improve near focus field

This distance adapter changes the area in which the kid's microscope can focus for the Aliexpress microscope https://aliexpress.com/item/1005007260123345.html which could not focus well on not flat materials. This adapter shifts the focus area for about 8 mm. The last two pictures show the same object pictures taken with this microscope first with adapter ring, second without adapter ring. My microcope had a conical clear plastic tube about 34.5 mm in diameter to 35 mm (measure your microscope clear plastic ring before printing, to make sure, it fits). This adapter ring clamps onto this clear plastic tube via friction without glue. I printed it in PLA with standard setting 25% infill.