While Scanning coins It seems I can not zoom in close enough to show great details as I see other coins posted. I have been using irfanview seems to be the best program I have found, still does not show details as clear as needed. (LOL or maybe there are none) I'm kidding but any advice thank you. What program or scanner best recommended? Thanks again
Tweaking your current scanner might work - increase the dpi the scanner can scan at and it should help.
To the best of my knowledge there is no way to zoom in on an image and increase or even retain fidelity (except in the movies). Of course this assumes you are already at the 1:1 level. Any attempt to compensate for an image getting "pixally" results in the image getting fuzzy.
On my sccanner I can do a pre-scan which does a very quick pass of the whole scanner area. Then I can crop that down to just the coin area itself and increase the scan resolution. Then I do a scan of just that area. That gives me a high resolution scan of just the coin that can be blown up without pixcellating and I can crop the image down to just that portion of the coin I'm interested in.
Experience indicates to me that when using a scanner you need to operate at least at 600dpi. I personally scan at 1200dpi. For digital cameras I use the finest resolution the camera allows. And get as close to the coin as possible making sure I keep the whole coin in the image. EXCEPTION: If I'm after particular details (OMM's, DD's, RPM's, etc.) then I get as close to that feature as possible. I let it fill the image if possible.
A decent photo editing software will allow you to zoom in on photos. Not sure how that would work with your scanner, but with my camera it's priceless. Download "Photoscape" (http://www.photoscape.org/ps/main/download.php) and have a ball. And it's free too...
But if you are going to zoom in you don't want it to pixcellate and to prevent that you need to make the original image at a higher resolution so the photo editing software has something to work with.