I am contemplating on getting a Fisheye lens for my E-M5 setup. I mainly shoot available light and always while FreeDiving. Most of the time I shoot either Whales and other large marine life or other freedivers.
I know the Panasonic 8mm is a great lens but the Samyang received great reviews in terms of image quality and sharpness. Will the fact that the lens is manual focus limit me too much? (Providing I can use the Zoom mechanism of the housing to Focus the lens). I can preset the aperture to F5.6-8 and only play with speed and iso...
Will the lens be sharp behind the 4.33 dome? I know it was designed for the Panasonic but the two lenses are very similar in terms or size (Pana is 61X52 and the Rokinon is 60X48.3).
Is the fact that the Pana has AF enough to justify the cost? Samyang- 260$, Panasonic-750$
Thank you very much,