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What Magnification Does PCGS Use For Trueview?

 
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 Posted 01/18/2022  10:47 am Show Profile   Bookmark this topic Add gnortsmra to your friends list Get a Link to this Message
Any ideas? 30x? What do you guys think?

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 Posted 01/18/2022  11:43 am  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply
I do not believe they use any magnification, just a high resolution camera. If they used magnification, they would need to stitch several photos into one and that would introduce too many artifacts.
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 Posted 01/18/2022  11:47 am  Show Profile   Bookmark this reply Add hfjacinto to your friends list Get a Link to this Reply
I doubt they use any magnification. The shots are probably with a macro lens and dslr and fancy lighting. It's just a product shot, you have a light box a dslr on a tripod /stand and lights. If it's shot at 1 to 1, you can get crazy resolution (think of a coin taking the exact same space as a full frame chip) on a 24 megapixel camera chip that coin will take 18-20 megapixels, sourced to you phone or computer it can fill the screen of an HD monitor, it can almost fill the screen of a 4K monitor. No magnification needed.
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 Posted 01/18/2022  11:54 am  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply
From PCGS
Quote:
Sizes: 2280x1140 (Large), 6000x3000 (Max), 5757x2905 (Max on white or transparent background), and 2905x2905 (Max Obverse or Reverse on white background)
https://www.PCGS.com/trueview

Max size in only 18 megapixels (decimal), which is only 9 MP per side.
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 Posted 01/18/2022  12:00 pm  Show Profile   Bookmark this reply Add ijn1944 to your friends list Get a Link to this Reply
Agree. Image resolution is the key factor here. Would be interesting to learn the sensor size of the camera(s) used by PCGS (or their contractor). A high resolution image gives the people doing the image processing a good deal of flexibility in manipulating (processing) the photo for final output.
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 Posted 01/18/2022  12:08 pm  Show Profile   Bookmark this reply Add hfjacinto to your friends list Get a Link to this Reply

Quote:
Would be interesting to learn the sensor size of the camera(s) used by PCGS (or their contractor). A high resolution image gives the people doing the image processing a good deal of flexibility in manipulating (processing) the photo for final output.


Based on Maximun size posted by jBuck, looks like a full frame chip, figuring some cropping, you are looking at at least 24 MP, if they are using Nikon camera all are 36.3 MP, Canon you range from 26.2 to 50.6. Assuming not crazy pixels, you are probably talking anything from the Canon 6d II to a 5D, or a Nikon 810. There is also the new crop of mirrorless which are around 30MP. I would think that the camera is most likely a 6D, 5d or Nikon 810.
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