Magnifier lens holder
thingiverse
Lens holder for lens of 100 mm diameter, 3.9 mm lateral thickness, max 4mm center thickness (but it can be modified in onshape, https://cad.onshape.com/documents/7ffdb8a7ed96499411a82aac/w/c90be652410490d11c196b58/e/dfc9508d945e6619685c2dc3) A m5 screw is needed. I used this lens: https://www.aliexpress.com/item/4000385196606.html?spm=a2g0o.order_detail.order_detail_item.9.1a676368sqRS7e I printed with 0.2 layer height.
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