The center dot which is a SFP of this Dual reticle (FFP+SFP) is illuminated. The dot size will stay the same regardless of the magnification. You can learn more about our dual reticle from our past article. https://marchscopes.com/news/10413/ (Received the question from Optics Planet on November 28th, 2024 and answered on the same day, Japan time. Answered by DEON (manufacturer of March Scopes))