| How to Determine Your Macro Magnification Nov 4th 2012, 03:00 Whether you are just curious, or need to know for some type of paper or documentation, it can be a bit complicated to determine your level of magnification. Hopefully this article will make it easier for you. - Set up the area where you will be doing the measuring. Lay the measuring tape or rule out on a flat surface. Set up a tripod for capturing the image without blur.
- Take a picture of the measuring tape. Start it on a whole number to make your math easier. Be sure that you will be able to see the measurement marks––ensure it is lit well enough.
- Do the math. In this screenshot, you see 11.75 and the camera sensor is 23.7.
- Repeat as needed. For reference purposes, the measurements refer to the setup, as follows, left to right, top to bottom:
- 50mm lens, full set of extension tubes, reversal ring
- 50mm lens, extension tubes (with 3 taken off), reversal ring
- 50mm lens, extension tubes (with 3 and 2 taken off), reversal ring (Down to just the 1 tube)
- 50mm lens, reversal ring
- 50mm lens, extension tubes.
Edit Things You'll Need - A ruler with mm measurements
- Knowledge of the size of your sensor. For instance, a Nikon D70 is 23.7mm X 15.6mm[1] (23.7 is the important one)
- A tripod (to keep shots accurate)
- A notepad to take notes on (optional, but helpful)
- Lens (if shooting SLR). It doesn't have to be a macro lens. You can use reversing rings and extension tubes to increase magnification.
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