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 Replies: 11 / Views: 2,055 |
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New Member
United Kingdom
4 Posts |
Hi,
I have a Tamron SP Di 90mm Macro lens for my Nikon D7000 and want to start photographing my collection.
Trouble I'm having is at 1:1 magnification I can only fit the smallest of coins into the frame.
Is there anyway I could fit larger coins in at 1:1 without changing lens? Would extension rings help?
If anyone has used this lens and can share their experience would be much appreciated.
I'm far from competent with a camera so any advice welcome on how best to use my setup :)
Thanks
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Pillar of the Community
United States
1602 Posts |
Have you tried putting your camera on a tripod and just increasing the distance from sensor to coin (backing up)?
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Valued Member
Australia
90 Posts |
 Don't concern yourself with the 1:1 Macro size. The sensor in your Nikkon is 23.6mm W X 15.9mm H Therefore the maximum size that can be shot at 1:1 is a coin with a maximum dia of 15.9mm. What you will do is "Fill the Frame" shooting, which will require you to move the camera from the coin. That 90mm lens I think has a close focus of 300mm, Back of camera to coin. Your local pre-decimal threepence might just fit the frame at 1:1 Edited by ford_prefect
12/03/2016 09:59 am
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Pillar of the Community
2087 Posts |
Quote:
The sensor in your Nikkon is 23.6mm W X 15.9mm H I don't know much about Nikon cameras but I thought the D700 was full frame ( 36mm X 24mm) I could be wrong though. Even if your camera were full frame at 1-1 you would not be able to fit larger sized coins on the frame. 1-1 means 1mm on the subject is imaged as 1mm on the sensor. Basically your Camera's sensor is too small to fit larger coins. As Ford prefect has said... don't worry about getting 1-1. just adjust the cameras position and focus so that the coin fills the field of view. Actually lower magnification has the advantage of greater depth of field. I am not sure why every one insists on having 1-1 macro lenses. That Tamron lens should produce good images |
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Valued Member
United States
441 Posts |
I have a Canon T6i (just a tad smaller sensor size than your Nikon, Coinrese), and use an EF100mm f/2.8L IS USM macro lens to take most of my coins photos with.
In order for me to frame a 40.6mm Eagle (largest coin I have) and have a bit of wiggle room for cropping, I need a distance of about 12" from the front of the lens to the coin. I usually set the f-stop at f8 or f11 with the ISO at 100, aperature priority mode. My shots come out pretty good, depending on how I well I light the coin.
You'll need some distance/height from the larger coins in order to frame properly. Show us some pics of your setup. That might help.
Edited by andywoj00
12/03/2016 3:59 pm
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Pillar of the Community
 United States
4593 Posts |
OP said D7000 not D700. Per dpreview, it's APS-C sized as ford_prefect said. Should get perfectly respectable images even at 1:3 for an ASE. -----Burton 50+ year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club Owned by three cats and a wife of 40+ years (joined 1983) Author: 3rd Edition of the Sample Slabs book, https://www.sampleslabs.info/ |
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New Member
 United Kingdom
4 Posts |
Hi, Thank you for all the responses. I have taken your advice and abandoned 1:1. I am using the settings provided by andywoj00 and getting pretty good results. thanks! Here is an example of the results and a photo of my setup. All comments welcome! Thanks again for the assistance.   |
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Pillar of the Community
Canada
2784 Posts |
coinrese very well done great detail in your photo. question is your coin yellow on my screen its yellow. what is the make of your light. again very well done
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New Member
United Kingdom
4 Posts |
Thanks Rocky, they are just cheap little lights that came with a mini pop-up studio tent from ebay. Think it was only around £20 all in. It came with a pair of these lights, I use an LED MiniSun (6000k) GU10 fit bulb in one of them for Cupro-Nickel coins and the other has just the standard bulb supplied, gives off a more yellow light, seems to work better for the copper and brass colour coins. The coin is gold plated, the photo looks gold on my screen.  |
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New Member
United Kingdom
4 Posts |
Here's a few of the of a nice cupro-nickel 50 pence using the LED lamp.   |
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Valued Member
United States
441 Posts |
Nice pics! Also, since you're shooting quasi axial with the glass, you have a bit of glare at the top edge of the coin. Put a small shallow block or something between the light and coin to just barely block the light on the top edge. You'll see the glare disappear.
I would also get the light a bit lower and more level to where it shines on the pane.
Edited by andywoj00
12/10/2016 3:47 pm
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Pillar of the Community
Canada
2784 Posts |
thats exactly how I deal with that light Andy. those are great photos. that tamron lens does a great job with that camera. great pics very well done
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Replies: 11 / Views: 2,055 |
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Posted 12/03/2016 09:58 am
