I thought the flower type was for wide angle lenses so as to avoid vignetting. For a telephoto a normal hood should be fine and the rubber hoods can be squashed flat for easy storage and they are cheap. I have an old Hoya rubber hood which does fine and the very deep plastic hood which came with my Canon 70-300 DO IS lens. I use the ''proper'' hood with this lens as its supposed to be very susceptible to flare with bright sources of light just outside the field of view but I have not suffered this yet. I would be happy with the rubbber hood.
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