If you wish to contact the author to contribute with information, photos, or make some corrections, sugestions or doubts, etc.., you could reach him at the following address:
Photo Contribution
If you wish to contribute with a photograph, please send it to email address. The preferred file format is JPEG with low compression, using the following resolution guide:
Scanned image: Resolution of 200-300 DPI (or more if necessary). This method is the best for banknotes and most cases of coins.
Digital Photo: Resolution of 1024 pixels of width that may be taken using a 3 Megapixels or more digital camera. This method is not preferred because the piece shape is generally distorted by the angle of the take and the brightness is not uniform.
Generally it's not easy to photograph coins that is not silver or it have Proof or shiny surface.
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