ortoslon

"f" ascender blurry at ~20 ppem in hinted TTF's

1

The ascender of "f" in hinted TTF's renders blurrier than in several other hinted sans-serif fonts at around 20–24 ppem. Hinted Inter v3.015;git-7f5c04026 in Chrome 88 on Win10: For comparison,...

Sans & Mono, probably hinting: "б" bowl taller than "o" at 24, 28 ppem

2

The bowl of "б" is correctly slightly smaller than "o" in the outlines yet is rendered taller at some sizes. https://github.com/IBM/plex/blob/04c26256b9fb5cf19dfc33623d71588fb125cf60/IBM-Plex-Sans/fonts/complete/ttf/IBMPlexSans-Regular.ttf in Chrome 95 on Win10:   https://github.com/IBM/plex/blob/04c26256b9fb5cf19dfc33623d71588fb125cf60/IBM-Plex-Mono/fonts/complete/ttf/IBMPlexMono-Regular.ttf: 

Bold "g" and "!" clump up at 21 ppem

1

https://github.com/weiweihuanghuang/Work-Sans/blob/6634e7b2395e9dba4ac8611c4529968a9719d606/fonts/static/TTF/WorkSans-Bold.ttf in Chrome 90 on Win10:  There seems to be not enough space between bowls of "g" at 21-22 ppem and parts of "!" at 21 ppem.

The last version with autohinting was great for long reading at least at odd ppems (o's are top-heavy at even ppems). https://github.com/undercasetype/Fraunces/blob/e92fd21244b76e4615b30adbb7197a425bbcc4fa/fonts/static/ttf/Fraunces9ptS100-Regular.ttf in Chrome 92 on Win10: