Sigma 10-20mm and Pentax 540AF Flash

Sigma 10-20mm is an ultra wide angle (UWA) lens, with an angle view of 60 degrees. It can focus up to 24cm, which is less than a feet for those who are still thinking in British system. It has a 77mm diameter filter thread. The result is that the Pentax K7 pop up flash will not work as the light will cast a shadown of the lens onto the photo.

The Pentax 540AF is the top of the range of flash. A direct (90 degree) flash will provide a poorly lighted photo on the side of the photo. After some experiments, a 180 degree flash to the ceiling bounced back the light, and the picture now is more acceptable. However, it will need a reflected ceiling. I will need a diffuser, if I were to shoot direct. I have not tried this yet as I don't have one to start with.

I find that using the Auto mode of the flash is better than P-TTL (Through The Lens).

I need to remember that Sigma is a 3rd party lens, and it meters using the "center weighted" and not the 77 segments.

Photography is all about practice. Moreover, once you mix and match system, it means a relearning and understanding how all these will work together and under what circumstances. I will post pictures in Flickr as the Picasaweb is devoted to family activities.

Living the good life is about smiling and keeping the mind occupied. Happy Easter to my Christians friends and relatives.

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