What macro focus range do I need to take close-up fine detail pics of coins and jewelry?

Answer 1

You don't need to get as close as you might think. I am assuming that you are interested in posting pictures on eBay. You can be around 10-12" away with a 4-6 MP camera and you will be quite able to crop out a decent 800x800 (eBay SuperSize) image.

Here's my standard answer about eBay photography.

If you are not going to go with a DSLR, almost any point and shoot with a macro mode will serve you well. The thing is, I feel that you need to use the flash to force the aperture to close while still having enough light for an exposure. Many here will tell you different, but follow this advice and see what you think.

Use your macro setting and experiment. Let's say you have a point and shoot camera with macro and a flash on the camera. You might have to go to a manual mode to do this, but...

Put your ring on a nice background surface. I like to just put it in a ring box. Zoom out at least half-way so that you will be working about a foot away from the ring. Be sure that you get focus confirmation. Shoot a picture USING flash. Check the LCD for the result. If you have overexposed the ring, use the EV adjustment to reduce the exposure. For small items, I often find that I need to reduce the exposure by about 1.0 EV. (That's -1.0 EV.) It is better to have the ring properly exposed and the background underexposed, so just worry about the ring for now. Using a deliberate underexposure will cure the "too shiny" appearance of the stones and metal.

If you know how, you can use either full manual exposure or just Aperture Priority and choose a smaller aperture (larger number) to make the ring show up in better focus.

If you have a DSLR, post your question again stating the kind of camera that you have and the lens that you are using and we will give more details.

If you are doing any image processing at all, such with Photoshop or it's cousins, you can crop the image to 800 pixels by 800 pixels and use Supersize images on eBay. I always use the Picture Pack when I am selling anything of any value.

Check out http://www.members.aol.com/swf08302/heartring.jpg which I did a while ago using a Nikon Coolpix 5400 exactly as described above. I do NOT think this is acceptable, but we decided not to sell the ring anyhow, so I didn't bother to do a better job. It's still better than some I've seen. I don't keep old photos of sold items around, so I don't have much to show you, but at least you know that it's possible to get an acceptable result even without spending huge dollars on your equipment.

The key things to remember are:
-Macro setting
-Zoom out to get about a foot away from your subject
-Use flash
-Try different EV settings and expect that you will end up with a negative EV setting, such as -1.0 EV.

Here are a couple of coin photos done exactly as described:

http://www1.snapfish.com/slideshow/AlbumID=57759389/PictureID=2801041875/a=75953750_75953750/t_=75953750
http://www1.snapfish.com/slideshow/AlbumID=57759389/PictureID=2801041874/a=75953750_75953750/t_=75953750

Here are a couple more auction photos done as described:

800 x 800 http://www.members.aol.com/swf08302/yorkie01.jpg
800 x 800 http://www.members.aol.com/swf08302/montblanc05.jpg

If you are interested in a full description of an SLR set-up, post a new question and ask specifically for that information. I'm gathering from the nature of your question that you might be in the point and shoot market.

Answer 2

I use an 80 marco lens to do close up. Don't forget to check your aperture too. Depending on what your aperture is set on will depend on what your depth of field will be. The easiest way to remember this is if your aperture setting is a small number, not much in focus, if it's a big number, a lot in focus.