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Canon T1i & Bellows GSA Dollars

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TJsCoins's Avatar
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 Posted 08/06/2012  12:01 am  Show Profile   Bookmark this reply Add TJsCoins to your friends list Get a Link to this Reply
Great thread!
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Ham1947's Avatar
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 Posted 08/06/2012  09:06 am  Show Profile   Bookmark this reply Add Ham1947 to your friends list Get a Link to this Reply
Ditto Captain. Ray, I had some shot posted, but took them down. I wasn't sure I had the correct shots, but as it turned out I did. I added one more at a lower angle (4 total). Shots were taken at approximately 90, 75, 45, and 30 degrees. The light source was 30" from the coin. And the coin has remained flat on the stand. Let me know if you need more information. I hope this helps. I thank both Ray and Captain for the help and patience.

Canon-T1i-&-Bellows-GSA-Dollars

Canon-T1i-&-Bellows-GSA-Dollars

Canon-T1i-&-Bellows-GSA-Dollars

Canon-T1i-&-Bellows-GSA-Dollars
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 Posted 08/06/2012  10:29 am  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
Ham...exactly what I was looking for. As you can see, going from "high" to "low" angle makes a huge difference in appearance of the coin. The high angle puts more light onto the coin and less on the holder, but doesn't show the luster as well. It's there, but it's starting to "spread out" rather than appearing in sharp bands. If you were at true 90-deg, the luster bands would spread evenly across the whole coin and thus disappear altogether! The low angle puts more light onto surface reflections and details, and shows the narrowest luster bands and the most surface detail, which is not always flattering.

Note that brightest luster band shows up on the 75-deg shot, but you've lost a lot of the subtle shadow detail around the devices by 75-deg. I would personally recommend you to find an angle between your 90-deg and 75-deg shots that narrows-up the luster bands a little but still maintains the shadow detail as much as possible. Subtle changes of a couple of degrees make a big difference! Once you have an angle that gives you what you are looking for, then add another light and try moving the two around to optimize the overall light vs shadow tradeoff.
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 Posted 08/06/2012  10:31 am  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
Oh, BTW...The "90-deg" shot looks really good to me! It may be that just keeping that angle, moving the light to 10:30, and then adding a second at 1:30 would be a great starting point...Ray
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CaptainFwiffo's Avatar
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 Posted 08/06/2012  10:46 am  Show Profile   Bookmark this reply Add CaptainFwiffo to your friends list Get a Link to this Reply
To add to that, you'll notice that the highest angles that you start getting glare on the holder (there's always a trade-off). If you want to use high-angle lighting, but want to avoid the glare, you'll want to look into Ray's smile directors.

Ray, I think you could package and sell smile direction kits. I imagine people calling into the support line and can hear the operator in my head - "Thank you for calling Smile Industries - how may I direct your smile?"
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Ham1947's Avatar
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 Posted 08/06/2012  2:53 pm  Show Profile   Bookmark this reply Add Ham1947 to your friends list Get a Link to this Reply
I think I am getting closer (with all the help) to what I want to see. I took a shot of the setup of the last photo. The camera is the Canon T1i attached to a Vivitar Bellows with a 75mm lens. And of course Ray's microscope stand setup. The glare you see on the setup photo is from the window, and isn't a factor when shooting.

Canon-T1i-&-Bellows-GSA-Dollars Photo settings are f8, .3sec., ISO 200.

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CaptainFwiffo's Avatar
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 Posted 08/06/2012  3:21 pm  Show Profile   Bookmark this reply Add CaptainFwiffo to your friends list Get a Link to this Reply
The contrast in your images seems to vary quite a bit, so I'm wondering where in the workflow that is happening. Basically, your black level is too high sometimes, which makes the image washed out and less punchy. I don't think it's really an exposure problem because it's not like your highlights are getting blown way out.

For consistency, I would stick with a single ISO and aperture setting while experimenting to minimize the variables. No reason not to use ISO 100 and go for minimum noise since you're on a fixed stand. Not sure what lens it is, but you may want to open it up wider than f/8; supposedly a notch or two down from the widest setting gets the best performance on most lenses. Then put the camera in Av mode and let the metering determine the shutter speed.
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Ham1947's Avatar
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 Posted 08/06/2012  5:18 pm  Show Profile   Bookmark this reply Add Ham1947 to your friends list Get a Link to this Reply
OK, I have moved the aperture down (2) stops to f4, changed the ISO to 100, and left the camera setting at Av. Shutter speed was 1/4 sec. Took this shot and did some PP. I don't have the best eyes, maybe that is my problem? It seems to look better.

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Ham1947's Avatar
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 Posted 08/06/2012  5:22 pm  Show Profile   Bookmark this reply Add Ham1947 to your friends list Get a Link to this Reply
One more thing, I did a custom white balance before the last shot.
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52Raymo's Avatar
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 Posted 08/06/2012  6:01 pm  Show Profile   Check 52Raymo's eBay Listings Bookmark this reply Add 52Raymo to your friends list Get a Link to this Reply
Personally, I would black out that window so I could get consistent and even lighting.
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Ham1947's Avatar
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1298 Posts
 Posted 08/06/2012  6:33 pm  Show Profile   Bookmark this reply Add Ham1947 to your friends list Get a Link to this Reply
One more shot for today. I left this one alone--no PP. I'm not familiar with how to add brightness, contrast, sharpness, etc. I think that is another reason why the examples vary so much. When processing, where do you start?

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 Posted 08/06/2012  8:06 pm  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
Ham...looking better, but your fields are still quite dark in front of Liberty's face and behind her cap, yet bright at tiara and near the date, indicating your lights are not quite at the right clock positions. I don't have a lot of experience with Morgans, but for coins in general the darkness in the fields at left and right and bright top and bottom looks unnatural. I'd recommend moving the light positions around until the resulting luster bars show up in the fields on left and right. My suggestion is 10 and 1. This will create a bar from behind the cap toward E of EPU, and another from chin to you of UNUM.
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CaptainFwiffo's Avatar
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 Posted 08/06/2012  8:53 pm  Show Profile   Bookmark this reply Add CaptainFwiffo to your friends list Get a Link to this Reply
Ham, what software are you using to process the images? Anything? Are you shooting JPEGs or RAW?
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Ham1947's Avatar
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 Posted 08/06/2012  9:03 pm  Show Profile   Bookmark this reply Add Ham1947 to your friends list Get a Link to this Reply
Couldn't stand it, had to shoot one more. Captain, I'm using the software that came with the camera (Canon T1i). I believe it's just a simple PP software, JPG image.

Canon-T1i-&-Bellows-GSA-Dollars. For this shot, I used (4) Jansjo's positioned roughly at 10, 2, 4, & 6 o'clock.
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Ham1947's Avatar
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 Posted 08/06/2012  9:06 pm  Show Profile   Bookmark this reply Add Ham1947 to your friends list Get a Link to this Reply
Sorry, part of the post of left off. I used (4) Jansjo's at 10, 2, 4, & 6 o'clock roughly.
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