[Q] Blur in images(Taken from camera and Downloaded HD Images) when zoomed in topic

Blur in images(Taken from camera and Downloaded HD Images) when zoomed in.
Checked with 3 Android One Micromax Phones.
Loaded a 13MP SLR Taken Pic when zoomed in 20%-40% images are blurry, where 80% zoom on other phones(Moto G) worked fine.

Please help me resolve this. Is this a bug