6 - DSC05029 - 900mm, mode APS-C - 21h18

            ROP sur la Lune

ROP pour Rapport Optique Proportionnel entre Distances et Hauteurs/Altitudes

Quand on double une Focale (quand on passe, par exemple, du 25mm au 50mm), on double la surface de la cible observée (la Lune ici)
On pourrait également, tout en restant au 25mm, se rapprocher davantage de la Lune, de la moitié moins de la distance initiale pour l'observer avec la même taille apparente qu'elle avait au 50mm à cette distance initiale...
... mais quelle est donc la taille réelle et EXACTE de la Lune ?
   

Taken on: May 21, 2024

Camera: Sony ILCE-7RM5, f/13.0, 1/125 sec, 600mm (=900mm), ISO 200 (more info) (hide info)

Camera:	Sony ILCE-7RM5
Aperture:	f/13.0
Exposure Time:	0.008 sec (1/125)
Focal Length:	600mm (35mm equivalent: 900mm)
ISO:	200
Exposure Bias:	0 EV
Flash:	Off, Did not fire
Exposure Program:	Manual
Exposure Mode:	Manual
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Software:	ILCE-7RM5 v2.00
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