2nd July 2004, 10:20 AM
How to use extension tube ?
My friend just passed my a set of extension tubes (12mm ,20mm, and 36mm)
May I know how to use it for marco shoot ?
And how to do the calculation ?
2nd July 2004, 10:30 AM
It simply reduces the mimimum focus distance...thats mean u go nearer to the object. So when u go nearer to shoot ur object becomes bigger loh!
a 50mm lens need a 50mm extension to reach 1:1 magnification
Think should be a ratio calculation...let other experts enlighten u..keke
2nd July 2004, 02:26 PM
2nd July 2004, 09:12 PM
can anyone enlighten me the distance you are from the object and the different zoom will give you wat kind of magnification ratio, how to calculate?
Originally Posted by rainman
3rd July 2004, 03:24 PM
3rd July 2004, 03:43 PM
1 more question: does extension tubes affect the amount of light entering the lens?
3rd July 2004, 09:55 PM
I guess not, but since light travels a longer distance in the lens, the light quality is somehow affected.
Originally Posted by behyx