A few months ago in November, Scubalamp showed a new "small strobe". I like small strobes and wanted one, but they have never appeared on the Scubalamp website. However there is a Fotocore GTM (the same ones in the Scubalamp posts that are available. I bought two of them, and last Saturday, I got to try them out here in Los Angeles. The strobe is a bit larger than the AOI RC strobes, and a bit smaller than the YS D3 Duo.
The strobe is machined aluminum and appears to be very solidly built if a bit heavy (815 g without the 2 x 18650 batteries). The strobe has 7 power levels that are shown on a nice little LED screen on the back. The key advantage to the GTM is that it has beautiful light since it uses a circular flashtube. One peculiarity of the strobe is that it uses only flattop 18650 batteries that are both hard to find and expensive. I have boxes of 18650 button tops, but no joy in these strobes.
To test them out, we went out diving to our local favorite spot off of Palos Verdes not far from LAX. I was shooting an OM-1 camera in an AOI housing with the 2 GTM strobes an a Leica/Panasonic 45 mm macro lens. The AOI has a built in LED trigger that never missed a shot with the strobes, I was using home-made fiber cables using the 613 core fibers.
The Balonophyllia is a solitary stony cup coral, its main claim to fame is that in the colder months (it is always cold at PV, typically 50F, 10C) it can in fact sequester dissolved organic carbon from the seawater directly. Hopefully it can teach its warm water cousins the same trick. If California had a state nudibranchs it would likely be the Spanish Shawl
These guy are everywhere and are quite beautiful. Interestingly the orange/blue/red and purple colors are all from the same molecule but with different arrangements of some elements.
Black eye gobies are always curious, coming by to see what you are doing and smiling at you
Two similar nudies are Porters and MacFarland; you tell them apart by the number of stripes. Porters has 2 syllables and 2 stripes, MacFarland has three of each.
And finally there are clowns.
Overall, I am very pleased with the performance of the GTM strobes. I didn't have a chance to see how they would be for wide angle (mostly the visibility was 2 meters or so) but at least in the studio they seem as powerful as the YSD3.
If you are looking for strobes for macro shooting with some occasional wide angle take a look at these.
Bill
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