50mm f1.8D and Extension Tubes on Parade
Prepared 2006-11-07 (169/11461) by Bill Claff

Just to give newcomers an idea as to the magnifications involved.
The attached image is a mosaic of eight shots using the 50mm f/1.8D AF Nikkor and the Kenko Automatic Extension Tube Set DG.
The target is a short metal ruler and an Intel Pentium keychain.
I was manually focusing on the ruler at closest focus with a macro rail.
Adjusted the images only to make contrast and brightness uniform.
Taken with a D200 at f/22 with ISO Auto on. And a tripod, of course.

extension

magnification

working distance

magnification

 

at closest focus

 

at infinity focus

mm

x

mm

x

0

0.156

347

0.000

12

0.412

145

0.252

20

0.524

110

0.367

32

0.772

84

0.624

36

0.836

78

0.688

48

1.088

62

0.938

56

1.200

58

1.051

68

1.458

50

1.299


Magnification at infinity; note these are measured not computed.