True Macro Quarter/Dime Test
May 10, 2012 10:06:22 #
After reading some of the requirements for a true macro I decided to give it a try. Here are my results using a Canon T2i at ISO 6400, with a 100-mm macro lens mounted on a tripod using auto focus. The distance to the front of the lens was about 6.5-inches.
1/125-sec at f/2.8
May 10, 2012 16:12:22 #
Excellent results! Notice how shallow the DOF at f/2.8. The dime is sharp, but the quarter is soft.
Your magnification is a bit larger than 1:1, a bit larger than life-size.
Your magnification is a bit larger than 1:1, a bit larger than life-size.
May 11, 2012 01:25:26 #
I think it was an interesting experiment to see how close to true life size I could get. I am still getting the hang of the lens. It is a challenge to get live bugs because they are not that cooperative.
May 11, 2012 02:24:01 #
I forgot to mention: A Canon APS-C sensor is smaller than a Sony or a Nikon sensor, so the apparent crop factor is 1.6x, which means that at 1:1 (life-size) the Canon image is a bit tighter, just like yours.
17-mm Dime & 24-mm Quarter macro field on a Nikon APS-C sensor
May 11, 2012 10:05:26 #
Nikonian72 wrote:
I forgot to mention: A Canon APS-C sensor is smaller than a Sony or a Nikon sensor, so the apparent crop factor is 1.6x, which means that at 1:1 (life-size) the Canon image is a bit tighter, just like yours.
Thanks for the info, your comments are greatly appreciated.
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.