Log in or Sign up
Coin Talk
Home
Forums
>
Coin Forums
>
Ancient Coins
>
Ancients: An Anonymous Hero (Phokaian electrum)
>
Reply to Thread
Message:
<p>[QUOTE="dougsmit, post: 1949555, member: 19463"]Examples of problems. Even nice examples of coins start to fall apart when you blow them up too large. I'm talking about 2000+ year old silver here not ASE PF70's. My coin here is a Tetartemorion (1/4 obol) of Kolophon and measures between 5 and 6 mm across depending on which route you take. The facing head is not excessively detailed and the toned surfaces are pretty good but looking at the file full size will show faults you can not see with a standard magnifier.</p><p>[ATTACH=full]339949[/ATTACH]</p><p>Click to enlarge. OOPS! Software here on CT reduces what can be uploaded. If you want to see the full detail go here:</p><p><a href="http://www.pbase.com/dougsmit/image/156519038/original" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.pbase.com/dougsmit/image/156519038/original" rel="nofollow">http://www.pbase.com/dougsmit/image/156519038/original</a></p><p><br /></p><p>This was shot without cropping but small enough that I could move the reverse onto the same file of the obverse without making it larger or smaller. Certainly I could have gotten closer than this 5" from the front of the lens but that would have required adding a third extension tube and would not have improved the image quality. It is limited by the coin to some degree. I suggest setting up your photo rig to shoot 'normal' size coins and just cropping when you shoot a little guy. Most macro lenses shoot to 1:1 which fills the common format cameras with a 13mm coin at closest setting. That is small enough for most uses. Canon does make a lens that goes to 5x but who has 3mm coins to shoot? Let's not get carried away.</p><p><br /></p><p>The point here is that good cameras are generally capable of more rendered detail than the coins. This one is a $450 lens on a 10 year old body available used for half that. You can do better for $4500 but do you have coins that need that level? The right side of the reverse shows texture from rough surfaces to compare with the smoother fields on the left. My photos would be better if I bought better coins. I wish I had a tiny gold but I don't.[/QUOTE]</p><p><br /></p>
[QUOTE="dougsmit, post: 1949555, member: 19463"]Examples of problems. Even nice examples of coins start to fall apart when you blow them up too large. I'm talking about 2000+ year old silver here not ASE PF70's. My coin here is a Tetartemorion (1/4 obol) of Kolophon and measures between 5 and 6 mm across depending on which route you take. The facing head is not excessively detailed and the toned surfaces are pretty good but looking at the file full size will show faults you can not see with a standard magnifier. [ATTACH=full]339949[/ATTACH] Click to enlarge. OOPS! Software here on CT reduces what can be uploaded. If you want to see the full detail go here: [url]http://www.pbase.com/dougsmit/image/156519038/original[/url] This was shot without cropping but small enough that I could move the reverse onto the same file of the obverse without making it larger or smaller. Certainly I could have gotten closer than this 5" from the front of the lens but that would have required adding a third extension tube and would not have improved the image quality. It is limited by the coin to some degree. I suggest setting up your photo rig to shoot 'normal' size coins and just cropping when you shoot a little guy. Most macro lenses shoot to 1:1 which fills the common format cameras with a 13mm coin at closest setting. That is small enough for most uses. Canon does make a lens that goes to 5x but who has 3mm coins to shoot? Let's not get carried away. The point here is that good cameras are generally capable of more rendered detail than the coins. This one is a $450 lens on a 10 year old body available used for half that. You can do better for $4500 but do you have coins that need that level? The right side of the reverse shows texture from rough surfaces to compare with the smoother fields on the left. My photos would be better if I bought better coins. I wish I had a tiny gold but I don't.[/QUOTE]
Your name or email address:
Do you already have an account?
No, create an account now.
Yes, my password is:
Forgot your password?
Stay logged in
Coin Talk
Home
Forums
>
Coin Forums
>
Ancient Coins
>
Ancients: An Anonymous Hero (Phokaian electrum)
>
Home
Home
Quick Links
Search Forums
Recent Activity
Recent Posts
Forums
Forums
Quick Links
Search Forums
Recent Posts
Competitions
Competitions
Quick Links
Competition Index
Rules, Terms & Conditions
Gallery
Gallery
Quick Links
Search Media
New Media
Showcase
Showcase
Quick Links
Search Items
Most Active Members
New Items
Directory
Directory
Quick Links
Directory Home
New Listings
Members
Members
Quick Links
Notable Members
Current Visitors
Recent Activity
New Profile Posts
Sponsors
Menu
Search
Search titles only
Posted by Member:
Separate names with a comma.
Newer Than:
Search this thread only
Search this forum only
Display results as threads
Useful Searches
Recent Posts
More...