• Direct light on the camera's lens may cause glare. For best results, cast a shadow over the camera's lens.

• Gently cleaning your camera's lens with a lens wipe will improve image quality. Dirty lenses produce softer images.

• Before shooting, stabilize the iPhone with a tripod or other means.

• Deliberately choose the focal range that interests you, near and far.

• The green dot on the focus range slider highlights where the camera’s lens is currently focused.

• Tapping on the camera view will hide the shooting controls and provide you with a full frame view of your composition.

• Advanced controls are accessible by swiping the basic control menu up.

• Use the app’s timer to provide some time for the camera to fully stabilize before shooting begins.

• Avoid including leading or trailing focal planes where nothing is in focus.

• Scenes where something is in-focus in every slice/frame will likely produce best results.

• Take an adequate number of slices/frames so there is a continuous transition of focus between images.

• As with any photography, brighter scenes (e.g. outdoor light) will produce better results.

• This technique (focus stacking) works best with stationary subjects.

• When using attachments, zooming the camera’s lens is probably advisable as it will likely reduce vignetting.

• Shooting without network access is fine. The app will defer server-side processing until WiFi network access is available.

• Plan for 1-3 minutes of processing per project, assuming you have decent network access. If the processing takes more than five minutes, that may indicate that there is difficulty aligning the input images - which may be indicative of poor quality input (low light levels, motion blur caused by a moving camera or subject, or lack of common subject area in the frames).

• If there are strange visual artifacts in the processed image, it is likely that an inadequate number of slices were taken and that out-of-focus regions existed between the slices.

• StayFocused is most appropriate for macro photography.

• Distortion may occur on the periphery of the processed photo's frame. For best results, compose the photo so the periphery may be cropped to reduce distortion.

• Different, after-market lens attachments will have different optical qualities. It may be beneficial to experiment with several if you have specific needs.