I am very happy with this macro ring flash. I've got great images that I would not have been able to capture without it. The great thing is the fact that one can use a really small aperture to increase depth of field and know that the exposure is going to be reasonably close to what's desired once it's set for the rest of the camera settings.Like any flash light, the light will reflect off other surfaces and increase the exposure level depending upon the backdrop one might be shooting an insect for instance against. If it's on a single stem with nothing behind it's going to be less exposed than if it were at rest on a leaf where the light will bounce and increase the exposure level.I'm shooting with a 5Dmk4 so can happily increase the ISO to enable me to use the flash at almost its lowest output as I find the images are more pleasing when the ambient light is able to play a part in the exposure. Also the recycling times are almost immediate at lower settings enabling a number of quick shots if the subject is likely to take flight, and one wants to move around the angles to get different shots of the same subject. The battery life is better than any other shoe mount flash I possess.I'd buy again with no hesitation, comes in a great bag which has a belt loop.