How to obtain 3:1 for super macro: I use a Canon 5d3 with extension tubes. I am thinking about a dedicated Canon macro lens and want more than a 1:1 aspect ratio/reproduction ratio.

STUNMUN Loc: Virginia

I use a Canon 5d3 with extension tubes. I am thinking about a dedicated Canon macro lens and want more than a 1:1 aspect ratio/reproduction ratio. How can I obtain a 2:1 or 3:1?

JR1 Loc: Tavistock, Devon, UK

Add the tubes

Nikocarol Loc: NM & FL

Long macro lens plus tubes as JR1 said. The 1:1 lens is too short in my opinion.

Rongnongno Loc: FL

STUNMUN wrote:

I use a Canon 5d3 with extension tubes. I am thinking about a dedicated Canon macro lens and want more than a 1:1 aspect ratio/reproduction ratio. How can I obtain a 2:1 or 3:1?

For this level of magnification you might want to consider a bellow and reversing the lens...
Extension tubes are ok but unyielding when a below is... Wow!

http://photo.net/canon-eos-digital-camera-forum/00QbY3

JR1 Loc: Tavistock, Devon, UK

I use a Canon 100mm and on occasions Canons 12 and 25mm tubes

clicktime Loc: Yucca Valley Ca.

Get a MPE-65 lens goes from 1/1 to 5/1. It's a difficult lens to work with but it does a great job once you get use to it. Go to the macro forum and look at the setups page and you can see all the ways to get past 1/1.

JR1 Loc: Tavistock, Devon, UK

clicktime wrote:

Get a MPE-65 lens goes from 1/1 to 5/1. It's a difficult lens to work with but it does a great job once you get use to it. Go to the macro forum and look at the setups page and you can see all the ways to get past 1/1.

But it is a lot for only one purpose, can not be used for anything other than macro

imagemeister Loc: mid east Florida

Use a bellows and reverse your macro lens or use a shorter enlarging lens reversed. You will be in full manual control.... If you want to retain AF (if you have it ) and auto diaphram you will need to use the auto extension tubes with your macro lens in the normal position.

cactuspic Loc: Dallas, TX

If you are going to work consistently in the 3/1 magnification area, then I concur with the MPE-65. It is very sharp. Using extension to get magnification favors a a short focal length macro lens(preferably reversed). You will need bellows, or extension tubes (at least two sets) because you will need extension in the amount of 4x the actual focal length of the lens to reach 3x mag. Reversed enlarger lenses on bellows or adjustable tubes also work well. One thing about shooting at higher magnifications. Be careful about stopping down too much to extend the miniscule depth of field. Diffraction will soften the image.

speters Loc: Grangeville/Idaho

STUNMUN wrote:

I use a Canon 5d3 with extension tubes. I am thinking about a dedicated Canon macro lens and want more than a 1:1 aspect ratio/reproduction ratio. How can I obtain a 2:1 or 3:1?

Get the Mp 65/2.8, it goes all the way to 5:1 and is a terrific lens, or use a bellows.

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

To me, It's like a 60mm macro lens with a variable extension tube permanently attached...

JR1 wrote:

But it is a lot for only one purpose, can not be used for anything other than macro

LoneRangeFinder Loc: Left field

JR1 wrote:

Add the tubes

A set of extension tubes on a 1:1 macro will not get you to 3:1. My Kenkos (68 mm of extension) + macro at 1:1 gets me to 1.9:1.

The only lens I know of that (by itself) goes beyond 1:1 is the Canon MPE-65 which focuses to 5:1. Don't have one as I shoot Nikon-- but this is the single lens that might make me go over "to the dark side".

;-)

pigpen

I'm not sure of the math, but I think I get 2:1 when I reverse mount a 55mm Mamiya f/1.8 to the front of my Canon 100mm macro. I'm sure someone here will be able to tell us the math for measuring the ratios. You still maintain AF with this set up.

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

If you are using a 105mm macro then yes, magnification won't be as great. However, if you use a 55 or 60mm macro lens with the same amount of extension, the ratio will be much larger (& the lens to subject distance will be much shorter)

LoneRangeFinder wrote:

A set of extension tubes on a 1:1 macro will not get you to 3:1. My Kenkos (68 mm of extension) + macro at 1:1 gets me to 1.9:1.

The only lens I know of that (by itself) goes beyond 1:1 is the Canon MPE-65 which focuses to 5:1. Don't have one as I shoot Nikon-- but this is the single lens that might make me go over "to the dark side".

;-)

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

At that ratio, you should be focusing manually...

pigpen wrote:

I'm not sure of the math, but I think I get 2:1 when I reverse mount a 55mm Mamiya f/1.8 to the front of my Canon 100mm macro. I'm sure someone here will be able to tell us the math for measuring the ratios. You still maintain AF with this set up.