Hello Fellow Forumers, I am reaching retirement age and My plan after that is to devote my time doing photography. Teaching has always been my passion, unfortunately Its not a good paying job so I settled to being ang engineer. But I do plan to teach for free when I retire. I want to do things that I was never able to do when I am still working. My approach to photography has never been technical and I am more driven with photos that I like rather go into the technical part. I am also not inclined to pixel peep and as long as the picture looks great , I don't care about the ISO or aperture and shutter speed. The immediate feedback given by the screen after every shoot has helped me a lot in my photography. during my film days , I spend a lot on polaroid backs to get my lighting right. My approach to photography has been to use many low power off camera flash as light sources that enhance the image. I used a low end DSLR, namely a Canon 600D and multiple Yongnou Flashes in many of my photographs and a Ultra wide angle lense, a 17-40mm L lense and a 70-200 mmm L Lense. Lately because of scoliosis I am no longer inclined to carry the heavy stuff. And have long wanted no use smartphones, but the absence of External Flashes for the smartphone has prevented me to embrace smartphones as my main photographic tool. I have the GODOX A1 but its limitation on sync speed left me unsatisfied. Things change this year when Innovatronix, the maker of the Explorer series of Battery powered packs released the CPFlash 550W. For the first time there is an Off Camera Flash that works reliably with a smartphone. Because it is a short burst of continuous LED Light, It will sync with any smartphones at any shutter speed. I have actually tried synching it up to 1/10,000 of a second. The CPFlash 550W is a powerful Tri-Function FLash and works as Flash for smartphones, a Flash for DSLRs and Mirrorless cameras and as a video effects light for videographers. Its power is equivalent to a 60WS speedlights the likes of the Canon 580EX and the Nikon SB900, Yongnou and Godox speedlights. It also comes complete with accessories such as magnetic filters , Smartphone camera trigger, DSLR/Mirrorless Hot Shoe Trigger, bracket and charging cable. The manufacturer claims that it works with all iPhones and Android SMartphones and it also works with all camera native and downloaded camera apps for all smartphones. So far I have tested the unit on my wife's iPhone 11 Pro, My Son's Samsung S10 and OPPO Smartphones and of course my Huawei P30 and it all works flawlessly. Please feel free to ask your questions as I love to teach and hopefully you will learn something new from me. Also for the studio and flash experts here, please correct me if I make a mistake as I am not an expert nor a professional photographer. Here is a picture of the CPFlash Kit: Here are some picture using multiple External Flash Taken during my DSLR Days . Canon EOS 600D F8, 1/125S , ISO200 28mm Canon 600D, F8, 1/100S, ISO100, 50mm Canon EOS600D, F11, 1/50S, ISO200, 10mm Canon EOS100D F4, 1/60S, ISO800, 17mm Canon EOS400D, F7.1, 1/30S, ISO400, 10mm Aside from a lower resolution image compared to a DSLR/Mirrorless image, There are 2 remaining areas where smartphones are not recommended. This will probably change in the next few years as camera development for the smartphones are progressing in a breathtaking speed. Here is a picture (not mine) that won second place in the very prestigious HIPA Photography Contest. As you can see in the picture. Background blurring via computational photography has come a very long way and that smartphones can now mimic a large aperture lenses with a few hand strokes. BTW this shot was grab in Facebook and I am sure the original resolution is much higher. People always think that using an OFF CAMERA FLASH Involves studio shots only but as some of my pictures have shown, it can be used very effectively outdoors. If not for this pandemic, I would probably be out in the field shooting pictures with my OCF and smartphone, but in the meantime I have to content myself with shooting in the studio. So what type of smartphones are suitable? I would suggest that you use a smartphone with at least 2 camera lenses and a smartphone with a manual mode. If your smartphone does not have a manual mode, you can purchase a camera app with a manual (sometimes called PRO) mode. Lightroom can be downloaded for free for both Android and iOS phones and there are hundreds of camera apps that cost from Free to US$10 for any phone. A manual mode is very important as it is very hard to control the lighting of a smartphone (Similar to a DSLR/Mirrorless) in program mode. The CPFLASH does not have FLASH TTL Capability. Here is my basic Gear for my Smartphone OCF Photography 1. Huawei P30 Smartphone ( It has a built-in Manual mode- no need to download any camera app) 2. 4 CPFlash 550W 3. A snoot ( to limit the focus of the light) 4. A Softbox 5. Godox Bowens Adaptors 6. 2 light stands (Generic) 7. A Tripod or a smartphone camera mount adaptor. My preferences has always been to shoot at a shutter speed of at least 1/100 and if it is not achievable then I would rather increase the ISO up to 400 . Please take note that a smartphone aperture cannot be adjusted and fixed with a value from f1.3 to f2.2. So to start with my tutorial here is a shot that i recently took in a studio. This is a 2 off camera shoot. One off camera is used as a hair light the other off camera flash was used as a main light. Main light power was at 30% while the Hair light power was set in the smartphone at 100%. Huawei P30 , F1.6, 1/200S, ISO 400, 6mm Here is the diagram of the shoot. Here is another variation of that shoot. Huawei P30, F1.6, 1/200S, ISO400, 6mm Here is a diagram of the shoot. Here is the smartphone shoot without off camera lights. shot in automatic mode Huawei P30, F2.2 1/17S, ISO1000, 2mm BTW the CPFLASH has a built in replaceable single Industry standard 18650 battery. It is good for about 100 full power flash so I bought additional batteries in Amazon for about US$5 each. But it is also very convenient to use a power bank to extend the life of the batteries for the duration of the shoot. In this photo I used a power bank and was able to use the CPFlash without interruption for the whole duration of the shoot. Next time I will be showing you more examples of my shoot. I would love to hear from you guys and If you have questions please don't hesitate to ask me. I will try to answer them to the best of my ability. Thank you and this is it for now. I hope you follow this thread.