Sigma 85mm 1.4 DG HSM Art

Canon 5d's sigma 85 art iso 50 200 @5.0

IMAGE LINK: https://photos.smugmug​.com …i-Cx8HcDJ-X3.jpg&lb=1&s=A

Mine doesn't show focus shift

But mine never leaves 1.4 either lol

Join the club. I actually like the look and size of the Art, one of deciding factors over the Canon L.

My regular exercise weight

I switched from the 85LII to this last week. I primarily will use it for weddings. heres a test shot from it.

So far, very impressed. the improvement in AF over the L is worth the switch alone.

I'm having trouble determining whether I need to adjust focus......... what types of tools, targets or software do you all use for adjusting focus with ART lenses? Do you do any in camera calibration at all or just use the dock? TIA

mpstan wrote in post #18427840
I'm having trouble determining whether I need to adjust focus......... what types of tools, targets or software do you all use for adjusting focus with ART lenses? Do you do any in camera calibration at all or just use the dock? TIA

I just usually take 500+ photos all around indoor and outdoor in various lighting and get a feel for what the lens can do and continually adjust from there.

Very quick 15 minute setup/shot/teardown of my daughter who felt youtube was more important but can always pull off a hip hop dance stance lol

mpstan wrote in post #18427840
I'm having trouble determining whether I need to adjust focus......... what types of tools, targets or software do you all use for adjusting focus with ART lenses? Do you do any in camera calibration at all or just use the dock? TIA

The Sigma USB dock came bundled with my 85A, and I have tried both the in-camera (Canon) micro adjust and Sigma way. The differences between the two are that, with the Canon way, the adjustments are 'global' throughout the full focus range, and the settings store in the camera lens profile. With Sigma dock, the settings store in the lens, and can be adjusted at 4 different focus distances.

With either way, it's time consuming to make the adjustments.

There are many commercially available focus test kits or targets, and many different ways to do the test. Do a search to see which is best for you.

I just use a simple ruler, set a high contrast target on the ruler, camera on tripod, center focus point, use flash to eliminate movement. Take a shot, the ruler will tell me if front or back focus. Make the adjustment in camera or with the Sigma dock. Take another shot.. then with different distance.. etc.

In my case, my lens back focus a hair, both methods can reset the focus perfectly with my 5D4. I prefer the Sigma dock, as I still have older camera bodies that don't have micro adjustment capabilities.

Lotto wrote in post #18428006
The Sigma USB dock came bundled with my 85A, and I have tried both the in-camera (Canon) micro adjust and Sigma way. The differences between the two are that, with the Canon way, the adjustments are 'global' throughout the full focus range, and the settings store in the camera lens profile. With Sigma dock, the settings store in the lens, and can be adjusted at 4 different focus distances.

With either way, it's time consuming to make the adjustments.

There are many commercially available focus test kits or targets, and many different ways to do the test. Do a search to see which is best for you.

I just use a simple ruler, set a high contrast target on the ruler, camera on tripod, center focus point, use flash to eliminate movement. Take a shot, the ruler will tell me if front or back focus. Make the adjustment in camera or with the Sigma dock. Take another shot.. then with different distance.. etc.

In my case, my lens back focus a hair, both methods can reset the focus perfectly with my 5D4. I prefer the Sigma dock, as I still have older camera bodies that don't have micro adjustment capabilities.

Hosted photo: posted by Lotto in
./showthread.php?p=184​28006&i=i259503430
forum: Lens Sample Photo Archive

Hosted photo: posted by Lotto in
./showthread.php?p=184​28006&i=i228762353
forum: Lens Sample Photo Archive

mine had back focus too , after -5 adjustment looks sharp on my 5d3 and 6d

Lotto wrote in post #18428006
The Sigma USB dock came bundled with my 85A, and I have tried both the in-camera (Canon) micro adjust and Sigma way. The differences between the two are that, with the Canon way, the adjustments are 'global' throughout the full focus range, and the settings store in the camera lens profile. With Sigma dock, the settings store in the lens, and can be adjusted at 4 different focus distances.

With either way, it's time consuming to make the adjustments.

There are many commercially available focus test kits or targets, and many different ways to do the test. Do a search to see which is best for you.

I just use a simple ruler, set a high contrast target on the ruler, camera on tripod, center focus point, use flash to eliminate movement. Take a shot, the ruler will tell me if front or back focus. Make the adjustment in camera or with the Sigma dock. Take another shot.. then with different distance.. etc.

In my case, my lens back focus a hair, both methods can reset the focus perfectly with my 5D4. I prefer the Sigma dock, as I still have older camera bodies that don't have micro adjustment capabilities.

Hosted photo: posted by Lotto in
./showthread.php?p=184​28006&i=i259503430
forum: Lens Sample Photo Archive

Hosted photo: posted by Lotto in
./showthread.php?p=184​28006&i=i228762353
forum: Lens Sample Photo Archive

My ruler was much smaller than what you were using, perhaps explaining my inability to discern where I was. I ended up with better luck focusing on a steep angle against a brick wall in my home; showed depth of focus pretty well.

Stupid question: how do you determine what your camera distance to target should be for the infinity distance?? What did you use?

Interestingly, when I emailed Sigma with that last question, they offered to calibrate both my 85 and my 35 ART lenses if I shipped them out with my camera. That impressed me.

Cheers

mpstan wrote in post #18433801
Stupid question: how do you determine what your camera distance to target should be for the infinity distance?? What did you use?


Cheers

http://www.cambridgein​colour.com …s/hyperfocal-distance.htm

If you look into the focus distance window on the 85A, 90% of the adjustments are for 20 feet and closer, the rest for background blur Seriously though, I have not tried correction at infinity, beyond taking a few shots at far distance and check them at 100% view.

A dedicated Canon shooter in Death Valley in middle of the summer..