Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
Forums  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear
Forums  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear
Register to forums    Log in

FORUMS Cameras, Lenses & Accessories Canon Lenses 
Thread started 12 Jul 2007 (Thursday) 15:14
Search threadPrev/next
sponsored links (only for non-logged)

noobie question

70 posts
Joined Jun 2007
Location: Portland, OR
Jul 12, 2007 15:14 |  #1

What are extension tubes for? After reading many forum postings, I am still a bit confused. Most people talk about them when referencing macro photography, so do they shorten the minimum focusing distance of the lens they are attached to? I would like to get a bit closer with my EF-S 17-85, would extension tubes help with this? thanks a lot!

932 posts
Joined Mar 2007
Location: Toronto, Canada
Jul 12, 2007 15:17 |  #2

extension tubes make your lens focus much closer; you can go really close to objects.
but it kinda "forces" you to shoot close, with a tube you cant shoot "normally" :P

and i think some extension tubes dont work with EF-S lenses...

Matthew Law
Gallery (external link) | My Gear | IG: (external link)

Senior Member
729 posts
Joined Jan 2007
Jul 12, 2007 15:23 |  #3

Yes they will help. They are simply tubes with no glass that essentially give the lens more "length". I like to think of it like those dinner tables that spread apart so an extension piece can be put in the center to make the table larger.
I use mine on my 50 1.8 and my 100 macro. You will lose focus to infinity but again it is meant more increasing the magnification of your subject up close.
I know some on the macro forum can give you the equation to work out your magnification with different ext. tube widths and your lens focal length. But the quick and dirty is it will get you closer when working at your minimum focus distance.

sponsored links (only for non-logged)

991 views & 0 likes for this thread, 3 members have posted to it.
noobie question
FORUMS Cameras, Lenses & Accessories Canon Lenses 
x 1600
y 1600

Jump to forum...   •  Rules   •  Forums   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset   •  Home

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!

COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.

POWERED BY AMASS forum software 2.58forum software
version 2.58 /
code and design
by Pekka Saarinen ©

Latest registered member is TomBehnfield
969 guests, 161 members online
Simultaneous users record so far is 15,144, that happened on Nov 22, 2018 Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.