The Sigma 30mm is outstanding and I never will have thought my best photos with Jelly Fish actually come from this close to $100 inexpensive lens. I wish Sigma come out with more E-mount lenses for the mass that is easily affordable for the common folks like me.
#1 The Dancing Couple
1/640 sec, f/2.8, 30mm, iso 200, -1.3 Ev, hand-held
#2 Turn With Lovely Tail
1/800 sec, f/2.8, 30mm, iso 800, -1 Ev
#3 The Happy Meet Up
1/250 sec, f/2.8, 30mm, iso 800, -1 Ev
#4 The Ultimate Kisses
1/100 sec, f/2.8 30mm, iso 100, -1.3 Ev
#5 Fallen In Love
Down I Go
1/320 sec, f/2.8, 30mm, iso 400, -1 Ev
I absolutely love the series with blue tone myself. It is gratifying to see the jelly fish under the beautiful and unique blue color. I was in awe with the beauty and I lack studying all the detail description of the type of Jelly Fish in the Aquarium venue of the Academy of Sciences museum. The aquarium tank is quite small and this type of jelly fish are moving constantly but not at great speed in a small tank as in 30 to 40 gallon size. Size of the jelly fish is above a small tangerine.
I may not shoot it correctly as I purposely shoot it underexposed by at least one stop and adjust brightness and highlight in post processing to bring out the darker surrounding and bluer translucent color from the amazing creatures. I shot some bigger jelly fish before in Monterey Bay Aquarium with long tentacles and some with smaller size body like a quarter coin but results don't come out nice like the above.
I shot the first few pictures in black and white as I love things in monochrome but they lose the vibrant color in the beautiful and unique blue tones