I photographed the formation of the green ray at sunset on Sunday, February 5th, 2023 from the La Frasca beach in Civitavecchia (ITALY). The Green Flash occurred on the upper edge of a cloud formation a couple of degrees above the marine horizon.
To learn more about green Reggio, I recommend my articles:

https://www.meniero.it/blog-ultimo-articolo/post/169108/introduction-al-raggio-verde
https://www.meniero.it/blog-ultimo-articolo/post/170344/come-si-forma-un-raggio-verde

Technical data:
I used a Nikon Z9 set at ISO 400 and Nikon 300/2.8G VR lens. The 300 mm focal length is too short to have a good magnification factor for shooting the phenomenon and therefore I applied Lolli Adriano's AMPLI optical extender tool so as to be able to extend the 13.5X focal length, I also set the shooting sensor in DX format (1.5X), so I got an equivalent focal length of 6.075 (300 x 1.5X x 13.5X) f/56.4. Shooting times are from top to bottom: 1/6400, 1/4000, 1/3200, 1/3200. With Photoshop I limited myself to editing the sequence, retouching the exposure of all shots by +1stop and modifying clarity, highlights and shadows.

Daten zum Bild