Advice re. extension rings on a 300 F/2.8 IS

Discussion

3 replies

Posted by A.R.D on April 12, 2007 at 4:27 PM

Can some one tell me what sort of close focus distance and mag' ratio I can expect if I buy and fit the Kenko extension ring set (12mm,20mm and 36mm) on my Canon 300 F/2.8 IS and maybe also an EF1.4 TC? Maybe not all the rings??

Can I hope for shots similar to a 50mm macro, 100mm macro....?

Any advice is gratefully received.

Thanks

Posted by Tim Munsey on April 13, 2007 at 2:50 AM

Hey up 'Ard,
Here's some sum's for you:
http://kenmcvayphoto.clymbers.com/articles/extensiontubes.html

Can't answer your question re the 50 and 100mm as I haven't got those.

Tim

Posted by A.R.D on April 13, 2007 at 10:17 AM

Tim, thanks for that.

I'm wondering about using the 300mm F/2.8 with tubes for dragon flies etc.

Cheers

Posted by PhilH on April 13, 2007 at 4:18 PM

Hi,

Should be ideal... you will gain working distance, DoF at the same aperture with the same subject magnification on the sensor with any lens will be as near as possible identical, my favourite lens for df's is the 300/4 with extension tubes.

HTH

Phil