Lastolite LL LS2426 Off Camera Flash Cord Single p TTL Pentax 3m Description. The Lastolite Off Camera Flash Cord 2426 means that you can use a dedicated flashgun up to 3m away from the camera whilst retaining full TTL flash metering. An ideal way to avoid harsh direct light often associated with on camera flash. This version is for Pentax DSLRs & compacts with dedicated hot shoe functionality.