I found item for sale on ebay, looks like the common and crappy canon18-55mm lens but there is a strange aperture where the front element should be, it doesn't look like a diy thing but factory made. I have never seen something like that, anyone knows that this might be? at first I thought it could be a display model but the description says it closes when the image stabilization is turned on.. makes it even more weird.
I'd buy it out of curiosity but it is in Canada
https://www.ebay.com/itm/406169446717 