Yes, HEIF photos are converted by iOS before sharing. iOS will automatically convert .HEIC files to .JPG before sending, or when opening in an app without HEIF support.
HEIF stands for High Efficiency Image File Format (HEIF). Using the HEIF specification for photos on the iPhone, iPad and iPod touch saves storage space without degrading image quality.
The latest update to iOS was billed as a HomeKit fix, however users have reported additional benefits to the install. iPhone X, iPhone 8 and iPhone 8 Plus users began reporting autofocus issues with the camera after installing iOS 11.2. Some devices would switch between wide and telephoto lenses, or refuse to make images sharp. Turns out these issues have been resolved on iPhones running iOS 11.2.1.
Photo-sharing site Flickr performed an analysis of uploads for its annual Year in Review. Following recent trends, smartphones were used to capture a full 50 percent of photos in 2017. The majority of remaining photos were posted by DSLR users, clocking 33 percent. Point-and-shoot cameras declined to 12 percent of images, with mirrorless cameras holding steady at 4 percent. The breakdown of device brands is where Apple shines.
If you are looking to grow your Instagram audience, using hashtags will certainly be a part of your strategy. The hashtag, if you are new to the concept, is basically a tool used to organize and navigate content on social media sites. For example, if you are looking for Instagram posts about skiing, you might search for #skiing, which may lead you to a post about skiing in Vail that may be tagged with #skiing and #skivail, at which point you could narrow down to just posts about Vail by clicking on the #skivail hashtag.