[Brightcolours]

Yeah, that was 55mm. A quick guestimate 20mm-12mm to the sensor at 35mm. I think 10mm is the smallest available tube length.

Yeah the 18-55mm was at the 55mm end when I tested it. Quick guestimate of the distance from subject to sensor at 35mm focal length is 20 to 12mm range. I think the smallest extension tube available for EF-M is 10mm, so you won't get a bigger range at 35mm than that.