Tag Archives: thyristor

Camera Flash Communication Methods Comparison (TTL vs E-TTL i-TTL p-TTL) and Thyristor Auto Mode

I talk about camera flash communication methods (TTL vs E-TTL i-TTL p-TTL) as well as thyristor sensor based auto mode. Here is the Youtube video: Diagram for TTL and pre-flash based TTL methods: Standard TTL: This was the original method of flash power control. It happens as the film/sensor is being exposed to light. There is a dedicated sensor near the film that monitors the reflected light off of the … Continue reading

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Pentax AF-280T Use and Settings Suggestions

I thought I wrote an article about the Pentax AF-280T flash unit describing what settings work best with the flash. I spend a few minutes searching through the site with no luck. I was making a large number of video overviews today and did one on the AF-280T. I guess that I mentioned an article that only existed in my mind! I’ll fix that post haste…done (see below). Put the … Continue reading

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