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 Replies: 48 / Views: 7,677 |
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Moderator
 United States
23522 Posts |
Wow. Didn't realize you were all the way stopped down. That's a really sharp lens, then. Raynox has add-on stuff that will work with your camera; given the quality of what you're already doing, though, I wonder if it's necessary.  |
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New Member
Canada
36 Posts |
So what would happen if you didnt stop down to F8...and let the camera choose a larger aperture and a faster shutter speed?
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Pillar of the Community
 Australia
655 Posts |
Stopping the lens down increases depth of field. Since the coin in my shots is also on an angle, part of the coin would be out of focus at full aperture.
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New Member
Canada
36 Posts |
You mean the coin does not face the lens at a right angle?
The images certainty look perfectly circular.
Less than 90 degrees gives a slightly ovoid appearance.
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Pillar of the Community
Australia
655 Posts |
You can notice some egg shape to the coin back on page 1 in post number 5 but in general it's only slight.
In any case the magnification is so high with macro shots that coins are no longer flat. High and low points, raised features and rims are at a different focus than the low flat fields. You might say macro makes mountains out of mole hills. I can see different parts of the coin going in/out of focus while adjusting the camera on the copy stand.
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New Member
Canada
36 Posts |
I see...hence the necessity of a wider depth of field. Which explains the long exposure.  |
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New Member
Malaysia
12 Posts |
magnificent! seems like quite alot of DSLR user here... hehehe... Mind to share your settings to us? |
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Pillar of the Community
Australia
655 Posts |
Here's a photographer's view of the settings.  |
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Moderator
United States
23522 Posts |
All right, now you've really got me in awe of your abilities. LCD shot from a second camera? |
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Pillar of the Community
Australia
655 Posts |
Nope. The camera has composite video out, which I fed into a USB video capture device for still frame capture.
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Pillar of the Community
United States
1571 Posts |
Learjet, would you mind a couple questions? I just bought a Canon Powershot A590 IS. It has wheel with a bunch of settings, and enough buttons to tie up ten sets of drawers. Would you have anty idea as to what would be a "good set of settings" to use, while I "memorize the book? I will post a picture, taken at about 8" from the coin. It is one of four that I shot since receiving the camers. It has 8MP, and 4x Optical zoom. comments, and/or suggestions? Here is the picture. It is hand-held, and with flash, ( I think). Than  ks, Dick Edited by livingdinasaur
12/16/2008 5:35 pm
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Pillar of the Community
Australia
655 Posts |
If you want to try manual settings, give these a go. Set shutter speed (depends on light), set aperture to the largest number you have eg F5 or more, set white balance (depends on light) set ISO somewhere between 100-200, maybe 400 if the light is not bright, turn off flash, you may need to turn on macro (flower icon).
Stabilise the camera and coin as best you can and experiment with light at different angles. That's pretty much all I did with my old Nikon 2mp camera and managed some fairly nice shots.
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Pillar of the Community
United States
1571 Posts |
Learjet, Sorry about not acknowledging your suggestions, but, in the intrim, I read the book, and located the controls, wheels,and buttons. Now aftre making a print out, I am ready to make an effort. I'll read the book one more time for effect,and to have it ion mind,so I can refer to different pages, for necessary changes, as needed. thank o=you for your efforts, and I was very lucky you have the same camera, as I have.
Dick
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Pillar of the Community
Australia
655 Posts |
We have different cameras, they are just the generic manual settings for most cameras, although I did look up the A690 specs. Most cameras can be coaxed into taking reasonable coin pics. SuperDave has a good thread that will suit most cameras, and the one in his example is close to yours. https://goccf.com/t/29441 |
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Moderator
United States
23522 Posts |
Quote:SuperDave has a good thread that will suit most cameras, and the one in his example is close to yours. https://goccf.com/t/29441 Speaking of which, now that I'm back from my walkabout I have to finish that thread. I believe that I'm gonna have to resort to axial lighting to get where I want to go. |
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Replies: 48 / Views: 7,677 |
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Posted 12/08/2008 6:59 pm
