Macro photography utilizing DSLR built in flash.
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DSLR pop-up flash lighting will throw its light over and above most near macro subjects.
I've found an innovative method using my Nikon DSLR pop up flash to effectively light up macro subjects.
I use a 3 x 5 fresnel lens,...the kind used to magnify small type in phone books and such and readily available at any stationary or office supply store.
I hold this fresnel lens by hand at the front end of my lens, in direct line with the cameras pop up flash,...As I tilt the fresnel lens forward at an angle it re-directs the DSLR flash output "downward" onto my subject,...otherwise my flash shoots above and over my macro subject,......missing it entirely.
It doesn't take long to get the nack of doing this,...nice with digital since you just delete your bad test images as you get the feel of it.
Exposures can be manipulated using various shutter speeds and/or f stop combinations as typical with strobe work.
Give it a try,...it's definitely inexpensive if your camera has a pop up flash.
I'm sure there could be many other clever variables to this approach.
It actually works out quite well.
I've attached an image of a bumblebee on a thistle,....as an example to illustrate what can be done.
Hope some find this method interesting.
Marty