Kenko Extension Tube Set - DPChallenge Forums

Nikon AF-S DX Zoom Nikkor 18-135mm f/3.5-5.6G IF-ED

02/08/2006 03:15:34 PM · #1

Kenko Extension Tubes

If I purchase this set will I be pleased?
Seriously, will the quality of the images be good?
Also, will these tubes work with my two lenses (Canon EFS 18-55mm & Sigma 70-300mm APO)?
And can all three tubes be combined together?
And if so what is the macro equivilent of the photos taken? 1:1? True macro images?
Thanks to anyone who has this set or knows.

Message edited by author 2006-02-08 15:16:47.

hopper

Canon EOS-80D

Canon EF 35mm f/2 IS USM

02/08/2006 03:18:33 PM · #2

yes
yes
no and yes
yes
depends and yes

(tubes don't affect quality, they won't work on ef-s lenses, when the tube number matches the lens length - you have 1:1)

joebok

Fujifilm X100F

02/08/2006 03:28:07 PM · #3

I've got a set and I'm happy with them. They are a cheap way to start to play with macro photography.

The quality of your photos should be the same - they are tubes; no optical elements. You do lose some light with them, so you may favor using them with your faster lenses.

The magnification is the length of the tube divided by the focal length of the lens - so a 50mm tube with a 50mm lens should give you 1:1.

Nikon AF-S DX Zoom Nikkor 18-135mm f/3.5-5.6G IF-ED

02/08/2006 03:32:23 PM · #4

Thanks, guys, for the quick responses. I think I understand. If all three of these tubes are combined that will be 68mm. I can then use it with my Sigma lens set at 70mm and take a photo that is almost but not quite a 1:1 macro image. Correct?

joebok

Fujifilm X100F

02/08/2006 03:39:06 PM · #5

Originally posted by arlanbart:

Yep. You'll probably have to be pretty darned close to your subject to focus with all those tubes. It's been a while since I messed with mine, but I seem to remember having to use less extension to get focus.

Nikon AF-S DX Zoom Nikkor 18-135mm f/3.5-5.6G IF-ED

02/08/2006 03:45:37 PM · #6

Makes sense.
So one last question: If I take my Sigma lens set to macro mode at 200mm, will I be able to add a tube and make the image larger in the photo? I'll just have to be closer to the subject, no?

joebok

Fujifilm X100F

02/08/2006 03:58:01 PM · #7

Originally posted by arlanbart:

I'm getting out of my league here - but I think that "macro" mode on most lenses means you can focus it closer. That is one of the handy consequences of using a (thin) tube - so you can work on a subject closer to the lens. But with a tube, the price of that means not being able to focus on distant objects.

So I guess what I am saying is that I don't think the macro mode of the lens is going to have much effect - the tubes, especially the longer you use, will dominate.

But yes, using the tubes always does give a magnifiction.