Nidelva river through Trondheim Norway

Nidelva river through Trondheim Norway
by Saaru Lindestokke                

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Sigma are a Japanese company which produce cameras, lenses and flashes. They're most widely known for their selection of lenses which are compatible with cameras from other manufacturers.

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95mm circular polarizer: B+W, Sigma, or other?

I'm looking for a high quality circular polarizing filter to fit a Sigma 150-600 zoom lens with a 95mm diameter, and the options at this size seem somewhat limited. Notably, the Hoya Pro1 CPL that's ...
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How can I fire a Sigma 610dg Super with a TriggerTrap Flash Adapter?

I have a Sigma 610dg super flash that I wish to trigger with the TriggerTrap flash adapter (tt-fa1). Sadly I cannot make this work. I have tried two different TriggerTrap dongles but the flash never ...