topic Re: 70-200 2.8 - Focusing Issue in EF & RF Lenses

70-200 2.8 - Focusing Issue

sarahr_7 — Tue, 13 Apr 2021 21:23:25 GMT

Hi all -

I have been having some issues with this lens (70-200 2.8 IS ii). These examples were shot at f/ 2.8 and when you zoom in, you can see that really there is nothing in focus. It appears like a total lack of focal plane. I use back button auto focus + single point and focus on the eyes.

Here is the original photo

Camera: Canon 70d

Settings:

Manual Mode
ISO: 250
182mm
f/3.2
1/5000s

Focus:

one shot
center focus point

Distance:

Probably about 10-15 away
I switched between 1.2-infinity and 2.5-infinity but both gave me the same results

When I use live view, I am able to get a crisp photo. I just wish I could get the same resutls with the viewfinder. (When I look the viewfinder, the photo looks sharp, but when I look at it - it comes out like this).

Any tips or advice for shooting with this lens and nailing focus would be greatly appreciated!

P.S: The lens has been calibrated (at home) and the photos still come out like this:

And this is with Live View:

Re: 70-200 2.8 - Focusing Issue

Waddizzle — Tue, 13 Apr 2021 20:02:58 GMT

Let's

@sarahr_7 wrote:
Hi all -
I have been having some issues with this lens (70-200 2.8 IS ii). These examples were shot at f/ 2.8 and when you zoom in, you can see that really there is nothing in focus. It appears like a total lack of focal plane. I use back button auto focus + single point and focus on the eyes.

When I use live view, I am able to get a crisp photo. I just wish I could get the same resutls with the viewfinder. (When I look the viewfinder, the photo looks sharp, but when I look at it - it comes out like this).

Any tips or advice for shooting with this lens and nailing focus would be greatly appreciated!

P.S: The lens has been calibrated (at home) and the photos still come out like this:

And this is with Live View:

Let's pick a photo. Need some more info from you. How much is this image cropped? Which camera?

What were your exposure settings?

Which AF mode? One Shot?

Which AF point(s) did you use?

How far away were your subjects, and did you set the focus range on the lens to match?

Which shooting mode on the top mode dial are you using?

Re: 70-200 2.8 - Focusing Issue

jrhoffman75 — Tue, 13 Apr 2021 20:13:46 GMT

@sarahr_7 wrote:
Hi all -
I have been having some issues with this lens (70-200 2.8 IS ii). These examples were shot at f/ 2.8 and when you zoom in, you can see that really there is nothing in focus. It appears like a total lack of focal plane. I use back button auto focus + single point and focus on the eyes.

When I use live view, I am able to get a crisp photo. I just wish I could get the same resutls with the viewfinder. (When I look the viewfinder, the photo looks sharp, but when I look at it - it comes out like this).

Any tips or advice for shooting with this lens and nailing focus would be greatly appreciated!

P.S: The lens has been calibrated (at home) and the photos still come out like this:

And this is with Live View:

You say you get sharp images with LIVE view and unsharp through the optical viewfinder. Is everything else constant? I.e. only variable is the viewing method?

You say you calibrated the lens - I assume you mean AFMA?

If the only variable is the viewing method then you need to check your AFMA settings.

Re: 70-200 2.8 - Focusing Issue

sarahr_7 — Tue, 13 Apr 2021 21:29:39 GMT

@Waddizzle wrote:

Let's pick a photo. Need some more info from you. How much is this image cropped? Which camera?

What were your exposure settings?
Which AF mode? One Shot?
Which AF point(s) did you use?

How far away were your subjects, and did you set the focus range on the lens to match?
Which shooting mode on the top mode dial are you using?

Here is the original photo

Camera: Canon 70d

Settings:

Manual Mode
ISO: 250
182mm
f/3.2
1/5000s

Focus:

one shot
center focus point

Distance:

Probably about 10-15 away
I switched between 1.2-infinity and 2.5-infinity but both gave me the same results

Re: 70-200 2.8 - Focusing Issue

sarahr_7 — Tue, 13 Apr 2021 21:29:02 GMT

@jrhoffman75 wrote:
You say you get sharp images with LIVE view and unsharp through the optical viewfinder. Is everything else constant? I.e. only variable is the viewing method?

You say you calibrated the lens - I assume you mean AFMA?

If the only variable is the viewing method then you need to check your AFMA settings.

Yes, it was with the microadjustment settings in my camera. It seems like I can never nail focus when I use the ptical viewfinder. I may need to re-visit those settings

Re: 70-200 2.8 - Focusing Issue

rs-eos — Tue, 13 Apr 2021 21:44:38 GMT

I'm wondering if the diopter setting is masking the issue (regarding the difference with live view vs the viewfinder).

Anyhow, what was the reason to apply microadjustments in the first place? Did you find consistent issues (e.g. backfocussing)?

When I had my 50mm f/1.2 lens on a EOS 6D, I found that combo had consistent problems, so I did the micro adjustments. But that same exact copy of the 50mm lens worked a-ok on my 5D IV without any adjustments.

Also, what equipment did you use for the adjustments? I personally use Datacolor's SpyderLENSCAL product.

Finally, if you absolutely need to apply adjustments, note that you'd want to be at a distance of say your average distance from your subject. That can be tough to choose just one value though, especially with a zoom lens.

Re: 70-200 2.8 - Focusing Issue

jrhoffman75 — Tue, 13 Apr 2021 22:05:52 GMT

Diopter won’t make a difference as long as the OP is not manually tweaking focus.

Frequently AFMA is not necessary. Reset AFMA to “0” and see what happens.

If you think you need AFMA try using the Canon approach. Link to follow.

Re: 70-200 2.8 - Focusing Issue

jrhoffman75 — Tue, 13 Apr 2021 22:06:53 GMT

https://cdn.static-bl.com/images/manual/Canon-AF-Micro-Adjust-Guide.pdf

Re: 70-200 2.8 - Focusing Issue

Waddizzle — Wed, 14 Apr 2021 00:24:32 GMT

@sarahr_7 wrote:
@Waddizzle wrote:
Let's pick a photo. Need some more info from you. How much is this image cropped? Which camera?

What were your exposure settings?
Which AF mode? One Shot?
Which AF point(s) did you use?

How far away were your subjects, and did you set the focus range on the lens to match?
Which shooting mode on the top mode dial are you using?

Here is the original photo

Camera: Canon 70d
Settings:
Manual Mode
ISO: 250
182mm
f/3.2
1/5000s
Focus:
one shot
center focus point
Distance:
Probably about 10-15 away
I switched between 1.2-infinity and 2.5-infinity but both gave me the same results

Thanks, for the clear and concise answers. I agree with the others. Zero out the AFMA settings. Leave it cleared out.

Making those adjustments should be a last resort, not a first option. It is easier to come up with a bad set of numbers than a good set. It is a deceptively difficult task. I am not saying it is hard, just that it is not easy to do. It can test your skills just as much the gear.

You are also working with a very narrow Depth of Field, too.

Re: 70-200 2.8 - Focusing Issue

ebiggs1 — Wed, 14 Apr 2021 14:52:12 GMT

"P.S: The lens has been calibrated (at home) and the photos still come out like this:"

This is almost assuredly the issue. People misuse this feature all the time. Set it back to zero. Now reset the 70D to factory. Menus, tools, clear all settings and clear all custom settings. Now set the 70D to "P" mode. Set ISO to 200 and daylight WB. Use One shot and do not use BBF or Ai-servo. Do use just the center focus point. Now tale some random shots out side on a nice sunny day. Make sure there are some vertical lines in you test sample shots like trees or a fence or buildings, etc.

If it works, it works and you set or set something incorrectly. If you still get OOF shots call Canon.1 (800) 652-2666 Set up a C&C for the lens.

BTW, you always shoot Raw? Not absolutely necessary for this test but it is in your normal work.

Re: 70-200 2.8 - Focusing Issue

ebiggs1 — Wed, 14 Apr 2021 16:21:50 GMT

Now the truth about AFMA. It does not make, not one tiny bit, you lens any sharper. This is impossible unless a mechanical part is changed, removed or replaced, once the lens is constructed. What it does is move the critical focus point in or out. You can get it so far off you are not actually focusing on what you think you are. Set it back to zero and do my test.

Re: 70-200 2.8 - Focusing Issue

sarahr_7 — Wed, 21 Apr 2021 14:58:39 GMT

@ebiggs1 wrote:
"P.S: The lens has been calibrated (at home) and the photos still come out like this:"

This is almost assuredly the issue. People misuse this feature all the time. Set it back to zero. Now reset the 70D to factory. Menus, tools, clear all settings and clear all custom settings. Now set the 70D to "P" mode. Set ISO to 200 and daylight WB. Use One shot and do not use BBF or Ai-servo. Do use just the center focus point. Now tale some random shots out side on a nice sunny day. Make sure there are some vertical lines in you test sample shots like trees or a fence or buildings, etc.

If it works, it works and you set or set something incorrectly. If you still get OOF shots call Canon.1 (800) 652-2666 Set up a C&C for the lens.

BTW, you always shoot Raw? Not absolutely necessary for this test but it is in your normal work.

Okay - will do! Thank you!

And yes, always shooting in RAW 🙂

Re: 70-200 2.8 - Focusing Issue

sarahr_7 — Wed, 21 Apr 2021 14:59:41 GMT

@Waddizzle wrote:
Thanks, for the clear and concise answers. I agree with the others. Zero out the AFMA settings. Leave it cleared out.

Making those adjustments should be a last resort, not a first option. It is easier to come up with a bad set of numbers than a good set. It is a deceptively difficult task. I am not saying it is hard, just that it is not easy to do. It can test your skills just as much the gear.

You are also working with a very narrow Depth of Field, too.

Okay, thank you! I will clear them out and see if I can get better results!