Maybe my method can help you, because most of us have a smartphone and/or tablet nowadays. I am using the free and open source app for android "Open Camera" with it i can enable the flashligt mode so the light is always shining so you can position to the right spot where you can see the ringcode or a part of it. I have redumped only one PSX game and it worked there great too i have returned the game disc so i cant show you the example but i did it with a DVD-9 PC game so you can see what i mean. On the last two pics i have put my phone on a box so i dont have to hold it.
I used this with my old samsung phone and with the new one and it works on both, but i would also like to hear if that works for other people too so please give me feedback about it.
For the ringcodes i try to move the flashlight spot in the middle of the disc and raise or lower the distance till i see something. For the ifpi codes in this example the flashlight spot is on the edge of the disc in the middle.
I don't know if it's my phone or not, but it's a bit hard to find the right position. But in the end i found easier if you put your phone over a box like your photo, and the disc under the light until you find the position good enough to take a photo with the visible ring. It's worth a try with a better camera, i guess. I will make some other tries with different camera-phone-angles until i can find the best way. With the clear disc anyway it's probably easier than trying with the damn PS1 black discs...
Plextor: PX-W4012TU, PX-W5224TA, Premium, PX-716SA, PX-760A || LG GDR-8164B || Lite-On SOHD-167D
HP (Toshiba/Samsung): TS-H353A - Kreon FW || HP (Hitachi/LG): BH40N - crossflashed with LG BH16NS40 FW || Sony Optiarc AD-7280S
what disc is it? And what smartphone do you use?
