This was taken handheld with the ancient 3 decade old Minolta 'Secret Handshake' 28-135 f4-4.5.
I confess I thought I was shooting at f6.3 and the tent was providing more shadow than I perceived, making for a less than optimal shutter speed for this level of scrutiny.

I acknowledge that this lens in not in the same bleeding-eye-sharp league as the peerless Zeiss 135mm f1.8...especially if we must observe the images at 100% like this.
None-the-less the image is 'sharp enough' and indicative of the lens' capabilities.

As is typical, I tend to heavily process my images and, YES, I cloned in the offending specular highlight by the chin:)