Classic mac CRT fuzzy in the corners?

I lately got a Macintosh Classic that was mint on the inside with extremely little dust/sot, and the picture is bright with very minor blooming when I set brightness to max. I thought all of this was a sign of a non-high-hour CRT, but the image is a little fuzzy in the corners (like all classic Macs I've had in my collection before!). Is this just how it was on these machines even when new, or is it a sign of a weak tube? I have of course tried to adjust the focus, but I just can't get uniform sharpness. It's either sharp in the corners, or sharp in the middle.

One person said that this comes from lack of dynamic focus, while another person said that he has seen uniform sharpness on these macs before. I feel it's time to find out, because I've been wondering about this for years now! 😂
 
Back
Top