How to Shoot a Coin with Your iPhone
An amazing iPhone photography from Tilo Gockel
Tilo Gockel – a professional photographer and expert in the field of lighting and flash lighting.
He has published countless articles on photography and image processing in popular magazines (digit, DOCMA, DigitalPHOTO, Photographie) and has written several books.
His blog, fotopraxis.net, offers numerous tips and tricks learned from his extensive experience with photography.
This is another cool BTS from Tilo. This time it is about taking pictures of a coin.. with iPhone!
Here we go:
Imagine, you want to shoot a beautiful specially minted coin. You want to show the nice embossment, and you only have your iPhone at hand. You want to make it look like in the teaser shot above, but your result looks more like this:
Yuk! But actually not a big deal, we can fix that. And no, you don’t need a new camera, because both photos were taken with the same camera––with an iPhone 4s––to show, that the camera does not have a really big impact here…
PROBLEMS & SOLUTIONS
If you compare the two shots, then you will spot, that the ugly shot lacks SHARPNESS. This is an easy fix, because you just have to use a tripod and a cable remote or selftimer and the shot will be tacksharp.
Also it helps, to use a more capable app like 645 Pro Mark III, to become able to finetune the EXPOSURE and the WHITE BALANCE.
And then you might notice, that the light is totally different between the two shots. For the ugly shot, I simply used the ambient room light, but for the cool shot, I set up a little darkfield illumination.
A darkfield illumination is a directional light in a low angle, which helps to show sander marks and embossments. The next sample shot shows this kind of illumination with a small torchlight, shining across the coin’s surface. What was bright, becomes dark and vice versa – that’s why we call it Darkfield illumination.
For the final setup I used three LED torchlights in a star configuration, which shine against a small cardboard cylinder. The cylinder has a little collar at the bottom, made from parchment paper, what makes the light softer and what guarantees, that only the low sidelight reaches the coin.
And then, since as we are talking about MACRO PHOTOGRAPHY here, you also might wish, that your subject fills the frame. This would work with a little lens attachment from Olloclip or so, but this also works without!
Just get as close as possible, and then fill the frame later-on via a tight crop in Photoshop. This costs resolution, but my coin shot in the original version still has 2500 x 2500 pixels.
I achieved this high resolution by taking 15 almost identical photos and by combining these using the SUPER RESOLUTION algorithm in the software PhotoAcute.
And at the end you might need some PHOTOSHOPPING to let the coin really shine. The screenshots show the procedure.
The Final Image