A bit of a technical challenge for this month, the cameras built into phones and tablets have to have short focal length lenses to fit in the thin bodies, this results in a greater depth of field i.e. more of the subject in focus, than the larger lenses on conventional cameras. For my entries in last months competition the mammillaria photos were taken on my phone and the schlumbergera using a mirrorless camera - to get as much as possible in focus the camera image is a stack of 20 images with the focus changing slightly between each one then a clever piece of software combines the in focus bits of the different images - much more complicated than the simple tap on the phone screen.
Most phones now have lots of pixels in their sensors so you might find you get a better picture by not getting too close then using simple editing software to crop the picture which should still leave enough pixels to fill most screens.
Editing is not required for the competition the only requirement is to use phone or tablet to take the picture
Picture below is how I posed the mammillaria - I did get a bit closer to take the image that was cropped before posting to forum
