SV555 Prime vs RF70-200 Zoom August 25, 2025

Single-frame "honest" (not post-processed) star field shots comparing:
   SVBONY prime SV555 f=243mm f/4.5 APO astrograph full-frame FOV=8.4x5.6 °
   Canon RF70-200mm F/2.8 L IS USM zoom lens at 200mm full-frame FOV=10°x7°
The first two photos of Lyra/Vega are full-frame images.
The last two photos of the Andromeda Galaxy M31 are 1.6x crops of full-frame FOVs.
Photos taken on different fairly clear nights at Carleton Place, a ~ Bortle 5 location
Click star photos for full window view.






P1: Lyra-Vega   ISO-2500 15sec f/4.5   Aug 17, 11:51pm EDT
P2: Lyra-Vega   ISO-1000 20sec f/3.5   July 22, 2:54am EDT
P3: Andromeda-M31   ISO-3200 15sec f/4.5    Aug 18, 12:18am EDT
P4: Andromeda-M31   ISO-1000 20sec f/2.8    July 22, 2:35am EDT