This is the the DIY Flash Bounce Card I use for event shoot, as well as impromptu portrait shoot. It's better than the built-in bounce card because it's bigger and bounces more light! Mine is made from foam material. More on this later.
I have the Lambency too but I have used it only once. Too heavy plus it didn't fit well on my speed light.
I use a couple of rubber bands to secure it to my speed light. You can use velcro too. This is for landscape mode shots.
For portrait/vertical mode shot, tilt the flash head like this, then..
then rotate your camera 90 degrees. Your flash will still be able to bounce light from the ceiling, if there is one!
Where to get this foam sheet?
You can get A4 size foam sheet from children art supply shops. I used to buy mine from a shop in One Utama. It's RM 2 per sheet. You can make two bounce cards out of it. But i have since found a more economical supply. Here you go:
About RM 5 to RM6 a roll. Available in Jusco, Tesco, Carrefour.
The dimensions are all here: top width - 6.5", bottom width - 4.5", vertical height - 6".
You can make it bigger or smaller if you want. I follow Peter Gregg's original dimensions as seen in his A Better Bounce Card clip:
A few sample shots with the DIY Flash Bounce Card:
Whether shooting bugs or human, as long as you use flash, remember to control the flash output using the FEC. More tips on FEC here.