If the photo is from the Internet, in safari you have an option to open page in iBooks. It creates and save the page as a pdf automatically. But if the photo is from the gallery or any other application, you can’t do it without a third party help. You can convert it online, (There are thousands of websites that can do this for you) Here’s a link to one of them. Convert JPEG Images Online (FREE) Or you may download applications sophisticated to this function, like ‘Camscanner’ etc. T make things more convenient for you.
I will show you how to convert them. 1. Go to your desktop. 2. Press and hold Ctrl, Space bar then click Convert To PDF’ at the bottom of the menu. 3. A pop-up window will appear asking if you want to do a PDF or a PNG image file. 3. Select whichever one is applicable and press Continue. 4. In the next pop-up window, find the file or pictures and click on it and choose the options you need to change for the file type. For example, I will use a JPEG image, I want to change it to a PDF, click on “PDF — PDF”. Once done, you will see the file added in the photo album, in My Pictures. 2. Go to My Pictures. 3. Navigate to your photo album, and you will see photos that you have converted. 4. You can choose to open them in some other application like iBooks.