Dot-Tune: Autofocus Fine Tuning in under 5 minutes
p.33 #1Dot-Tune: Autofocus Fine Tuning in under 5 minutes
snapsy wrote:
Canon version of technique
1. With the camera mounted on a tripod, enter Live View and establish critical focus on a high-contrast subject over the center point. Exit Live View.
2. Set the lens to MF (Manual Focusing). Be careful not to jostle the focus ring when you move the switch - you don't want to alter the focus you established in step #1.
Will it be OK to swap steps 1 and 2? That means; 1) Set the lens to MF. 2) Manually focus in LV and then exit LV.
Am I missing something?
Canon version of technique
1. With the camera mounted on a tripod, enter Live View and establish critical focus on a high-contrast subject over the center point. Exit Live View.
2. Set the lens to MF (Manual Focusing). Be careful not to jostle the focus ring when you move the switch - you don't want to alter the focus you established in step #1.
Will it be OK to swap steps 1 and 2? That means; 1) Set the lens to MF. 2) Manually focus in LV and then exit LV.
Am I missing something?
Feb 06, 2016 at 12:16 PM
p.33 #2Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Why not AF in Live View?
Feb 06, 2016 at 01:19 PM
p.33 #3Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Jeff Donald wrote:
Why not AF in Live View?
I can get a correct focus manually in 10x LV. And I don't have to worry about disturbing the focus ring while changing from AF to MF.
Why not AF in Live View?
I can get a correct focus manually in 10x LV. And I don't have to worry about disturbing the focus ring while changing from AF to MF.
Feb 06, 2016 at 01:29 PM
p.33 #4Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Max10 wrote:
1. With the camera mounted on a tripod, enter Live View and establish critical focus on a high-contrast subject over the center point. Exit Live View.
2. Set the lens to MF (Manual Focusing). Be careful not to jostle the focus ring when you move the switch - you don't want to alter the focus you established in step #1.Will it be OK to swap steps 1 and 2? That means; 1) Set the lens to MF. 2) Manually focus in LV and then exit LV.
Am I missing something?
Nope, that'll work fine.
I only suggest AF first for those who want to use CDAF in LV rather than having to manually focus in LV.
snapsy wrote
Canon version of technique1. With the camera mounted on a tripod, enter Live View and establish critical focus on a high-contrast subject over the center point. Exit Live View.
2. Set the lens to MF (Manual Focusing). Be careful not to jostle the focus ring when you move the switch - you don't want to alter the focus you established in step #1.
Am I missing something?
Nope, that'll work fine.
I only suggest AF first for those who want to use CDAF in LV rather than having to manually focus in LV.Feb 08, 2016 at 11:13 AM
p.33 #6Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Has anyone does much experimenting to see how consistent their contrast detection focus is on their camera?
For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?
For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?
Feb 23, 2016 at 12:23 AM
p.33 #7Dot-Tune: Autofocus Fine Tuning in under 5 minutes
SeattleBirdMan wrote:
Has anyone does much experimenting to see how consistent their contrast detection focus is on their camera?
For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?
Canon's contrast-detect precision is pretty good but there's still enough variance to significantly effect potential tuning. I generally MF in LV using a magnifying loupe when I DoTune. Roger did a precision test of CDAF as part of his PDAF precision tests - you can see the results here. In my experience, Nikon's CDAF has much worse precision than Canon - in fact Nikon's is so bad that on newer bodies like the D750/D810, PDAF is more consistent than their CDAF.
Has anyone does much experimenting to see how consistent their contrast detection focus is on their camera?
For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?
Canon's contrast-detect precision is pretty good but there's still enough variance to significantly effect potential tuning. I generally MF in LV using a magnifying loupe when I DoTune. Roger did a precision test of CDAF as part of his PDAF precision tests - you can see the results here. In my experience, Nikon's CDAF has much worse precision than Canon - in fact Nikon's is so bad that on newer bodies like the D750/D810, PDAF is more consistent than their CDAF.
Feb 23, 2016 at 01:08 AM
p.33 #8Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Thanks for the response Snapsy. I do use Canon cameras. Interesting suggestion to use manual focusing. I'd have to practice that. I'm not sure if I could be very accurate on manual focus even using 10x view.
Feb 23, 2016 at 01:11 AM
p.33 #9Dot-Tune: Autofocus Fine Tuning in under 5 minutes
I usually check the range three times. Usually, all agree. Sometimes one reading is significantly off but not reproducible.
SeattleBirdMan wrote:
Has anyone does much experimenting to see how consistent their contrast detection focus is on their camera?
For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?
SeattleBirdMan wrote:
Has anyone does much experimenting to see how consistent their contrast detection focus is on their camera?
For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?
Feb 23, 2016 at 06:21 AM
p.33 #10Dot-Tune: Autofocus Fine Tuning in under 5 minutes
SeattleBirdMan wrote:
Has anyone does much experimenting to see how consistent their contrast detection focus is on their camera?
For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?
Yes, that's why I quit using the Dot Tune method. But I have Canon equipment. For Nikon, apparently, it works much better.
Has anyone does much experimenting to see how consistent their contrast detection focus is on their camera?
For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?
Yes, that's why I quit using the Dot Tune method. But I have Canon equipment. For Nikon, apparently, it works much better.
Feb 23, 2016 at 08:12 AM
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p.33 #11Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Works great for all my Canon gear.
Definitely more consistent, cheaper, and portable compared to Focal. YMMV
Definitely more consistent, cheaper, and portable compared to Focal. YMMV
Feb 23, 2016 at 08:46 AM
p.33 #12Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Obviously, my mileage varies. FoCal is a pain to use, but since version 2.0 has been released, I have consistent, reliable MFA. Maybe it is just me. But most of my photography friends no longer use Dot Tune either. Of course, we all have Canon bodies. I wish Dot Tune was reliable (for me) because it is a simple method. Glad you're satisfied with Dot Tune.
Feb 23, 2016 at 10:19 AM
p.33 #13Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Thanks Snapsy, bookmarked this a few months ago when it trickled to the top again. Got around to trying it today. Worked great for me with a 1Dx, 70-200 II, 85 1.8 and 50 1.8. All done in under 30 minutes. Would have taken me much longer with Focal. Not a knock against Focal as it does many other things also.
Mar 04, 2016 at 10:51 AM
p.33 #14Dot-Tune: Autofocus Fine Tuning in under 5 minutes
snapsy wrote:
For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?Roger did a precision test of CDAF as part of his PDAF precision tests - you can see the results here. In my experience, Nikon's CDAF has much worse precision than Canon - in fact Nikon's is so bad that on newer bodies like the D750/D810, PDAF is more consistent than their CDAF.
Wow, that is very surprising?! That just throw something I assumed about CDAF out the window.
SeattleBirdMan wrote
Has anyone does much experimenting to see how consistent their contrast detection focus is on their camera?For example you do the normal dot tune method and get a range of -12 to 4 for a specific camera /lens combo. Then you do another contrast focus for the same lens/camera combo this time you might get -10 to 6. These are not too far off. However sometimes I have had the range shift 8 or more.
Has anyone else seen that before?
Wow, that is very surprising?! That just throw something I assumed about CDAF out the window.
Mar 04, 2016 at 11:05 AM
p.33 #15Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Just tuned my 1Dx with a couple primes and additional 1.4x extender.
Repeated results are consistent. Results are sharp.
Repeated results are consistent. Results are sharp.
Mar 04, 2016 at 11:05 AM
p.33 #16Dot-Tune: Autofocus Fine Tuning in under 5 minutes
dgdg wrote:
Just tuned my 1Dx with a couple primes and additional 1.4x extender.
Repeated results are consistent. Results are sharp.
Thanks just reminded me I forgot to throw the 1.4x on the 70-200 II.
Just tuned my 1Dx with a couple primes and additional 1.4x extender.
Repeated results are consistent. Results are sharp.
Thanks just reminded me I forgot to throw the 1.4x on the 70-200 II.
Mar 04, 2016 at 11:21 AM
p.33 #17Dot-Tune: Autofocus Fine Tuning in under 5 minutes
svassh wrote:
Repeated results are consistent. Results are sharp.Thanks just reminded me I forgot to throw the 1.4x on the 70-200 II.
My bare lenses fair quite well, but once I put on the 1.4x and 2x, whoooaa!
dgdg wrote
Just tuned my 1Dx with a couple primes and additional 1.4x extender.Repeated results are consistent. Results are sharp.
My bare lenses fair quite well, but once I put on the 1.4x and 2x, whoooaa!
Mar 04, 2016 at 11:36 AM
p.33 #18Dot-Tune: Autofocus Fine Tuning in under 5 minutes
Dumb question. If you dot tune 3 lenses obviously they will have different settings. Does your camera (6d/70d) "remember" the settings automatically or do you have to set something up like a custom setting and trigger that each time you use a different lens.
Mar 04, 2016 at 11:50 AM
p.33 #19Dot-Tune: Autofocus Fine Tuning in under 5 minutes
pointbob wrote:
Dumb question. If you dot tune 3 lenses obviously they will have different settings. Does your camera (6d/70d) "remember" the settings automatically or do you have to set something up like a custom setting and trigger that each time you use a different lens.
Yes, there is a setting to save adjustments for each lens or use the same adjustment for all lenses. Just make sure it is set appropriately.
Dumb question. If you dot tune 3 lenses obviously they will have different settings. Does your camera (6d/70d) "remember" the settings automatically or do you have to set something up like a custom setting and trigger that each time you use a different lens.
Yes, there is a setting to save adjustments for each lens or use the same adjustment for all lenses. Just make sure it is set appropriately.
Mar 04, 2016 at 11:52 AM
p.33 #20Dot-Tune: Autofocus Fine Tuning in under 5 minutes
SeattleBirdMan wrote:
Yes, there is a setting to save adjustments for each lens or use the same adjustment for all lenses. Just make sure it is set appropriately.
Thanks: do you know where in the menu that would exist?
pointbob wrote
Dumb question. If you dot tune 3 lenses obviously they will have different settings. Does your camera (6d/70d) "remember" the settings automatically or do you have to set something up like a custom setting and trigger that each time you use a different lens.Thanks: do you know where in the menu that would exist?
Mar 04, 2016 at 11:55 AM