Showing results for 
Show  only  | Search instead for 
Did you mean: 

Close focus distance for RF100mm F2.8 L MACRO IS USM


What is the distance between the subject and lens front [filter ring] at 1.4x maximum magnification for 

RF100mm F2.8 L MACRO IS USM?

Does anyone have a chart showing subject size at various lens-to-subject distances?



Note that focusing distances are not typically computed from the front of the lens, but instead from the sensor.  Your camera should have a symbol of a circle with a line running through it (typically near the viewfinder).

Pages 13 and 14 of the User Manual should include all the information you're after (to include distances from the from the front of the lens).


Camera: EOS 5D IV, EF 50mm f/1.2L, EF 135mm f/2L
Lighting: Profoto Lights & Modifiers


I don't care how far it is from the sensor to the subject; what counts is the working distance from the front of the lens to the subject: 0.28' or 3.36" according to the user Manual. Thanks.  A chart of subject size and distance from the lens would still be helpful. 



I found the information Ricky provided to be helpful.  MFD is an industry specification.  Since MFD is calculated from the subject to the sensor, this is the information provided by the manufacturer.

The lens is approx 5.8 in.  Add a filter its approx 5.825

Mag 1.4x is 10.32 in 

Mag 1.0x is 11.04 in

Mag .5x is 15 in

Lens measurement is from the front of the lens to the flange. 

Flange distance on an RF lens is 20mm or .787 in

So if you take the lens and filter (if applicable) 5.825 + the distance from the flange to the sensor .787 = 6.612 in

Mag 1.4x is 10.32 in - 6.612 in = 3.708 in

Mag 1.0x is 11.04 in - 6.612 in = 4.428 in

Mag .5x is 15 in - 6.612 in = 8.388 in

The MFD at 1.4x is 10.32.  The lens + filter is 5.825 in = 4.495 in. - (minus) the flange distance .787 in = 3.708 in

Someone should probably verify my calculations 🤣

Bay Area - CA

~R5 C ( ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, +RF 1.4x TC, +Canon Control Ring, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve ~Windows11 Pro ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8
~CarePaks Are Worth It

National Parks Week Sweepstakes style=

Enter for a chance to win!

April 20th-28th