Sigma 150 f2.8 underwater?

[JoDive]

Hi,

Did anyone try the Sigma 150mm f2.8 lens underwater?

If yes what port was used? And what about the results?

Thanks


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e620 on PT-e06 and e520 on PT-e05; 8mm, 9-18mm, 12-60mm, 50mm, 2x converter; 2units of Inon z-240 and 2 units of S&S YS250

 

[scottfiji]

>> And what about the results?

I think the results will tell you more about the photographer than the lens

but seriously, I think that is too long of a lens for an Oly E620, it's 300mm equivalent. I would try nothing longer than a 100mm F2.8 lens (200mm equivalent) for very skittish subjects, and for supermacro with a +5 flip-diopter.

hope this helps

 

[slowhands]

If you mean on an Olympus 4/3 camera, remember the 2x multiplier on focal length, so this is effectively the same as a 300mm macro. The longest macro lens I have ever used or even seen is 200mm, and not often did I need it. That would be for skittish insects or poisonous snakes, for instance. I usually used a 50 or 105mm macro. In Olympus 4/3 terms, probably the 50 macro is the longest I would expect to use. And that is an excellent lens, so no loss. Plus, I seriously doubt you could ever find a port for such a long lens on an Olympus housing. You could cobble something up from Ikelite modular ports, but that means a new housing.

Maybe another way to approach this is to get some macro lenses like the 35, 45 and 50 and try them out underwater. I think you'll be happy with the 50, I know I am on land. That's as long as I can imagine wanting for a 4/3 camera.

 

[JoDive]

Hi,

Thanks for your answers.

I usualy use the Oly 50mm + Oly 2x teleconverter + 2 Inon 165 wet lenses with satisfactory results. The inconvenineces of this setup are some abberation with the wet lenses and with the teleconverter i have a f4.0 instead of a f2.0 lens.

Please see two example of photos taken using the setup mentioned above.

Bought the Sigma 105mm f2.8 but for me it has two main problems too long and too slow to use underwater so i sold it 3 weeks after.

The 150mm as some advantages for instance,
. Contrarely to the 105mm the size of the lens don't change
. Focus distance of 0.38m / 14.96 in that you can make short with diopter (wet or not)

I am convinced that this would be a good lens for underwater micro photo but have to try it

Regards