Canon Rebel EOS T3i Settings For Coin Pictures

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Author	Replies: 6 / Views: 2,796
Steelers72 Pillar of the Community United States 1448 Posts	Posted 07/28/2018 02:06 am I recently bought a canon rebel t3i, a macro lens, two very high powered LED lights. The macro lens has the following specs: Optical Power: 0.43X Time conversion factor of your current lens setting + MACRO Color: Black Optical system: 3 elemens in 3 groups conversion type Mount system Optics Screw type in front of existing camera lens with 58mm filter thread Multicoated optical elements Capabilities: 174 Degrees circular fisheye capability Full Panoramic shots capable Maintains: all lens and camera functions Infrared capable Day and night optics The problem I am having is when I finally take the picture, a red light on the bottom right of the camera goes on and causes the snap to pause, resulting in a blurry pic. When I switch to AV mode instead of Manual mode, sometimes I dont have the issue. These are my settings when I use Manual. The view of the coins +lighting is perfect looking through the lens. Capturing a sharp picture is my only issue.. Edited by Steelers72 07/28/2018 02:08 am Report this Post to the Staff

rmpsrpms Pillar of the Community United States 4037 Posts	Posted 07/28/2018 09:50 am I highly recommend only using Av mode for this type of shooting. Also, I see you are stopping the lens way down, to F29. What lens are you using? I would not go beyond f11, and generally would stick with f8. F29 will make your shots blurry due to diffraction. The long exposure time of 1sec may also be contributing to the blurriness. Going to f8 will speed that up a lot and make the shots sharper. Contact me for photographic equipment or visit my home page at: http://macrocoins.com Report this Post to the Staff
BadDog Pillar of the Community United States 1374 Posts	Posted 07/28/2018 10:17 am Quote: Capturing a sharp picture is my only issue.. How are you taking the photos? with a copy stand? or handheld? I believe that with those settings you'd definitely need to be using a copy stand in order to get a focused picture. with Ray as well. Most lenses have a sweet spot somewhere between F5.3 and F11, typically F8 or F6.3. I wouldn't think you'd need to use F29 to get a good picture. The aperture is very small at that F stop, so you need the long exposure time to get enough light on the sensor. You do get more depth of field at F29 for focusing, but you shouldn't need it if you're using a copy stand. The DOF you get with a larger aperture (smaller F stop) should be sufficient provided the copy stand base is parallel to camera sensor. Report this Post to the Staff
MontCollector Pillar of the Community United States 2403 Posts	Posted 07/28/2018 3:19 pm I currently use a Canon Eos Rebel T3 with the 18-55mm macro lens with 2 diffused Jansjo lights. For extreme close-ups I use tube extenders. They usually come in sets of three, 13mm, 21mm, and 31mm. They can be used individually or in any combination of the three. Much cheaper than getting a larger macro lens or bellows. I also made a copy stand to hold the camera as still as possible. This is a must when shooting coin photos. I would also recommend tethering your camera to your computer. This allows you to use the Canon Live shot mode. It lets you to control your camera with your computer. Takes a photo with 1 click of the mouse and allows you to see what you are shooting at on your computer screen instead of the little screen on the camera. As for the settings, This is my weakness. I currently run close-ups on the "P" or programmable mode. I know this is probably wrong but it seems to take decent photos.. I think I will have to try using the AV mode and see what happens. I hope this helps. Mont. Edit: I should add that in order to use the Canon Live shot feature you will need to install the software that came with the camera. It is part of the Canon Utilities Software package. If the software didn't come with your camera I think you can DL it from the Canon website. Edited by MontCollector 07/28/2018 3:29 pm Report this Post to the Staff
Steelers72 Pillar of the Community United States 1448 Posts	Posted 07/28/2018 9:54 pm Thanks all! I will try to tinker with the settings based on your recommendations and get back to you with results. Much appreciated !! Report this Post to the Staff
Crazyb0 Rest in Peace 10197 Posts	Posted 07/28/2018 11:15 pm Report this Post to the Staff
Nickos New Member Greece 45 Posts	Posted 07/29/2018 11:39 am ...by the way, I do not think you are using a (real) macro lens. What lens are you using? (i.e Canon EF-S 18-55) MontCollector gave you the solution with extenders and copystand. Stick on f/8.0 and iso 100. It would be nice to show us a picture of the coin before and after and also to write the different techniques. Report this Post to the Staff
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