Canon 5d Mark Iv Focus Tracking

By | 05/08/2022

Canon Focus Bracketing

Canon first introduced the Focus Bracketing feature in the Canon EOS RP mirrorless interchangeable lens camera. The Catechism EOS R5 and Canon EOS R6 were adjacent.

What is Canon EOS Focus Bracketing?

When enabled, the focus bracketing feature instructs the camera to have a serial of pictures with the lens’ focus distance setting increasing betwixt each image captured until the specified number of images are captured or until infinity focus is reached. The resulting set of images can then be focus stacked during postal service-processing with the result being an increased depth of field, potentially by a significant corporeality, while avoiding the softening furnishings of diffraction caused past very narrow apertures use.

This technique is normally used in macro photography equally the depth of field is typically extremely shallow at very close focus distances. Landscape photographers ofttimes use this technique to go along entire scenes that include a close foreground bailiwick in focus.

Here are two illustrations:

Canon EOS RP Focus Bracketing Example

Keep in mind that the depth of field difference is much more obvious in the full-resolution images.

The Catechism Focus Bracketing Settings

In that location are four settings used to control the focus bracketing feature.

  1. Actuate Focus Bracketing (Enable/Disable)
  2. Input number of shots (2 to 999)
  3. Focus increment (1-10)
  4. Exposure smoothing (Enable/Disable)

Hopefully, the first option is self-explanatory. The feature is either enabled or disabled.

The number of shots instructs the photographic camera to capture upwardly to the specified number of images. I say “up to” because the camera stops taking photographs when infinity focus distance is reached and this may but require a small number of images regardless of the number of shots setting. Use this setting to limit the camera to a shorter focus distance range, or gear up the number very high to ensure that all distances including infinity are covered.

The focus increment setting is definitely the vaguest on this list. This setting deals with the granularity of the focus distance aligning between each shot with 1 requesting fine increments and 10 requesting broad increments. Specific distance changes are non able to exist input and with the depth of field increasing with altitude, a non-specific increment value makes sense. Focus brackets always kickoff with the initial focus distance and proceed toward infinity (the ending distance cannot be directly specified). “The wider the pre-set lens discontinuity, and the closer the lens is to the subject for the get-go shot, the effectively the focus increments should unremarkably exist, and the more Focus Bracketed shots should be dialed-in.”

Exposure smoothing is disabled by default, but when enabled, the camera keeps image effulgence consistent through the prototype set. This feature is primarily useful for compensating for light transmission losses when lenses, particularly macro models, are focused at very close distances.

Optional is for the camera to create a new folder on the retentiveness card before the bracketed sequence starts, making it easy to carve up a potentially large number of images. Tapping the “Folder +” icon creates a new folder and subsequent images are saved in that location.

Which Lenses are Officially Supported past Focus Bracketing?

Canon engineers have specified that merely the lenses listed below are officially compatible with the focus bracketing characteristic. Yet, reports exist of additional lenses appearing to be supported past this feature. While information technology seems prophylactic to say that all RF lenses volition exist supported, that expectation was not initially confirmed by Canon. We also practice not know why official compatibility is express to this a list of lenses, though the lenses on this list seem like logical choices for use with this characteristic.

  • Canon RF 24-105mm f/4L IS USM Lens
  • Canon RF 28-70mm f/2L USM Lens
  • Canon RF 35mm f/1.8mm f/1.8 IS STM Macro Lens
  • Canon RF 50mm f/one.2L USM Lens
  • Canon EF xvi-35mm f/4L IS USM Lens
  • Canon EF 24-70mm f/4L IS USM Lens
  • Canon RF 35mm f/1.8 IS STM Macro Lens
  • Catechism EF-S 60mm f/2.8 Macro USM Lens
  • Catechism EF 100mm f/2.8L IS USM Macro Lens

The initial list for the R5 and R6 is significantly expanded:

  • Canon RF 35mm f/i.8mm f/ane.eight IS STM Macro Lens
  • Catechism RF 50mm f/1.two L USM Lens
  • Catechism RF 85mm F1.2 L USM Lens
  • Canon RF 85mm F1.2 L USM DS Lens
  • Canon RF 600mm F11 IS STM Lens
  • Canon RF 800mm F11 IS STM Lens
  • Canon RF 15-35mm F2.eight Fifty IS USM Lens
  • Canon RF 24-70mm F2.viii L IS USM Lens
  • Catechism RF 24-105mm f/4L IS USM Lens
  • Catechism RF 24-105mm F4-7.1 IS STM Lens
  • Canon RF 24-240mm F4-six.3 IS USM Lens
  • Catechism RF 28-70mm f/2L USM Lens
  • Catechism RF 70-200mm F2.8 Fifty IS USM Lens
  • Catechism RF 100-500mm F4.5-7.1 50 IS USM Lens
  • Canon EF 100mm f/2.8L IS USM Macro Lens
  • Canon EF 180mm f/iii.5L USM Macro Lens
  • Canon EF sixteen-35mm f/4L IS USM Lens
  • Canon EF 24-70mm f/4L IS USM Lens
  • Catechism EF-S 35mm f/2.8 Macro IS STM Lens
  • Canon EF-South 60mm f/2.8 Macro USM Lens
  • Canon EF-South 18-135mm f/3.five-5.half dozen IS USM Lens

“Nosotros absolutely cannot guarantee proper Focus Bracketing operation when third-party lenses are fastened.” [Canon]

Additional Notes

  • The camera should be tripod mounted or similarly motionless during focus bracketing capture
  • JPEG or RAW file capture is supported
  • Only creative zone exposure modes are supported (P, Tv, Av, Fv, or M)
  • To ensure consistency, exposure settings, ISO, AWB, and Picture Style settings are locked-in with the get-go shot regardless of the mode selected
  • In Thousand or Av mode, any discontinuity can be selected, though a relatively narrow aperture such equally f/8 or f/xi reduces the number of shots needed
  • The lens must exist in AF mode for focus bracketing to work, though total-time manual focus can be used after half-pressing the shutter release to begin the sequence capture
  • Whatever subjects that are in motion during the bracketing capture will likely create ghosting in the final image
  • Conform focus breathing equally the lens may magnify the scene differently as the focus distance is adjusted
  • Lighting changes during capture may create uneven brightness in the final image
  • Proper exposure should be confirmed earlier initiating a focus bracketing sequence
  • Focus bracketing in progress tin can exist canceled the same way it was started, by pressing the shutter release button
  • After the last frame, the lens should exist focused on or across the well-nigh distant element that is desired to exist in focus. Otherwise, more frames are needed.

Intelligence Built In

“… Canon engineers have revealed nothing about the calculation process involved in the Focus Bracketing feature. Nosotros tin infer that the system is factoring-in the lens (and focal length) in employ; the actual lens aperture in event; and the initial sharp focus distance applied past the photographer. In other words, it’s probably rubber to presume that the amount of focus deviation at Level 3, from shot-to-shot with a 100mm macro lens, initially focused at its nearest focus distance and with an aperture of f/4, is dissimilar than it would be at level 3 with the 16-40mm lens at f/11, pre-focused at 4 or 5 feet away for the beginning in a series of landscape shots.”

Nonetheless, it seems that this procedure could be farther automated. If the camera could exist informed of the desired far focus altitude, either directly input into the camera or selected via the lens (perhaps make infinity the default), the photographic camera would be able to automatically calculate both the focus increment and the number of shots.

Focus Stacking After Capture

All of the images captured by Focus Bracketing are stored on the memory card. Each set of images can exist used to simply select the single best-focused pick. Or, more than typically, further processing via “focus stacking” is required. This process cannot be done in-camera and probably most of us would not desire to expect while our cameras did this job.

There are a number of software applications that back up focus stacking, including very popular Adobe products, merely focus stacking is now included in Canon Digital Photo Professional person’s composite tool. Initially introduced in version 4.10 with support for the Canon EOS R, EOS RP, and EOS 5D Mark IV, the DPP compositing tool comes highly recommended, especially for some of its processing features including the power to adjust the amount of groundwork mistiness in a last stacked result. DPP creates a folder in the same binder the stacked result (JPG or TIF format) is beingness written to. Binary files are stored in this folder including a large file for each image used in the stack forth with a data file. These files are required for the adjustment functionality and can exist deleted afterward the prototype is finished.

Canon’s DPP software is provided complimentary with Canon EOS cameras (I use DPP a lot).

Canon’due south Focus Stacking is Really Easy

The Christmas cactus that spends most of the year looking rather mundane, essentially green foliage in a pot, finally opened a single bloom. These blooms final but a couple of days, they are irresistibly-beautiful, and I decided that testing the EOS RP’south focus stacking feature was a good excuse to photograph this one.

For this commencement focus bracketing and stacking attempt, I mounted a Canon EF 100mm f/two.8L IS USM Macro Lens to the EOS RP via an Adapter and mounted both on a tripod. It was a cloudy twenty-four hour period, so I positioned the blossom in diffused ambient light with a brilliant wall backside it.

The 100mm f/2.8L IS macro lens, like many others, has a significant amount of focus breathing with the bailiwick being magnified very differently at the ends of the necessary focus aligning range. The final focus stack prototype framing will be the aforementioned as the most-tightly-framed image in the stack (and retains the original pixel dimensions) and thus the composition was adapted for the tightest framing.

The ambience lite was non changing much and that means a transmission exposure is usually ideal. With the finish goal of focus stacking being to have tremendous depth of field, it makes sense to use a narrow aperture and f/11 is a nice compromise between a good amount of depth of field and the softening effects of diffraction. ISO 100 was selected for the lowest amount of noise possible and a couple of test shots proved that a 0.5 second shutter speed yielded the correct effulgence. Note that testing exposure before initiating a focus bracketing sequence is important – fifty or 900 images are not necessary for this. The 2-2d self-timer was used to initiate the relatively long captures.

With the camera in AF mode, the closest focus distance required by the stack needs to be selected at the starting time of the capture. I opted to place one of the photographic camera’s single (spot) AF points on the closest office of the flower. Alternatively, The focus altitude could have been adapted afterwards half-pressing the shutter release (or setting just the dorsum AF-push for AF). I enabled focus bracketing, guessed that I would need 25 images, guessed that “4” sounded like a good focus increment number and figured that exposure smoothing would minimally do no damage in this case.

Upon the shutter release being pressed, the photographic camera paused ii seconds and so captured the promised number of frames. When the bracketing was completed, the lens’ focus altitude was across everything I wanted to be in focus, confirming that enough exposures were captured.

Upon reviewing the images in DPP, I discovered that only 14 were needed for consummate depth of field coverage in this example. After selecting those xiv images, the depth compositing tool was selected (Alt+Shift+B) and the Execute button was pressed, accepting the defaults. After quickly erasing the background using the paint fill tool in Photoshop and doing some very minor cleanup, the result is what you see here.

Canon EOS Focus Bracketing and Stacking Example

In the above examples, the first row shows total images reduced in size. The second row shows significantly-cropped images that ameliorate show the depth of field comparing. The terminal two rows evidence 100% crops.

This was a very easy process and the result looks great.

Somesville Bridge and Selectmen's Building

Also check out the Canon EOS R5 Focus Stacking at the Somesville Bridge and Selectmen’s Edifice instance. Again, the procedure was like shooting fish in a barrel, and the results are superb.

Thanks, Rudy!

A big “Thanks!” goes out to Canon U.s.a.’s Rudy Winston for meaning assistance in putting this commodity together. The quotes included above are his.