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iPhone XR,XS,XS MAX Apple announced three new iPhones: iPhone XS ,iPhone XS MAX  and iPhone XR. iPhone Xs MAX and iPhone Xs Display: iPhone Xs MAX comes with 6.5"  super retina custom OLED display with 2688 x 1242 resolution and 458 pixels per inch and iPhone Xs comes with 5.8" super retina custom OLED display with 2436 x 1125 resolution and 458 pixels per inch. iPhone Xs MAX with 6.5 inched display is the largest display ever on an iPhone.  The OLED panels in iPhone Xs allow for an HDR dispaly with the industry's best color accuracy and with the highest pixel density , on any Apple device. Storage: Storage capacity of iPhone Xs : 64GB , 256GB and 512GB Camera: Camera: Both phones comes with Dual 12-Megapixel wide-angle cameras,f/1.8 aperture,2x optical zoom where digital zoom up to 10x,portrait mode with advanced bokeh and depth control  Front-facing camera is 7-megapixel bring depth to portrait mode photos.  SIM:

WHY GOLDEN RATIO IS RELATED TO PHOTOGRAPHY  What is golden ratio? - In   mathematics , two quantities are in the   golden ratio   if their   ratio   is the same as the ratio of their   sum   to the larger of the two quantities. The figure on the right illustrates the geometric relationship. Expressed algebraically, for quantities   a   and   b   with   a  >  b  > 0, {\displaystyle {\frac {a+b}{a}}={\frac {a}{b}}\ {\stackrel {\text{def}}{=}}\ \varphi ,} where the Greek letter phi ( {\displaystyle \varphi }  or  {\displaystyle \phi } ) represents the golden ratio. It is an irrational number with a value of: {\displaystyle \varphi ={\frac {1+{\sqrt {5}}}{2}}=1.6180339887\ldots .} The golden ratio is also called the  golden mean  or  golden section. (source:wikipedia) -you can trace the curve of this golden ratio by making squares using fibonacci sequence{0,1,1,2,3,5,8,13,21,.....}.It is sum of previous numbers,{[0],[1],[0+1=1],[1+1=2],[1+2=3],...}. Why it is related to