7DMII AF Microadjustment Variation

Hi all

I was wondering if there is a registered tolerance variation after the application of microadjustment, I find that after application of micro adjustment AF, he still seems to be some inconsistencies. In this example, I use my Canon 50 mm f1.8. I have configured my 7DMII on a sturdy tripod and took my Lensalign target with rule on another tripod. I have measured the correct distance between the camera body and the target, calibrated the height as the instructions say to do, used the median point AF, the camera 'mirror lockup', set the AF One Shot reader and using the timer function that I took a three test photos to use as a base to f1.8 line.  See the photos on my computer, I discovered that my 50mm f1.8 front focuses a bit, but not really when I apply a microadjustment + 3, and I'm going back to my computer to look at the results. This return is now focusing, so I decide to try a + 1. I once photographed and test it on my computer and now the adjustment is right on. It is fine, but when I then take a series of photos of test with adjustment + 1 focal plane varies, and sometimes it varies a bit. See these examples:

+ 1 correction:

Now before we focus a little more:

Now to back focusing a bit:

Now before update:

Now before we focus more:

Now to back focusing again:

I had the camera for about a year, and generally I shoot a lot of youth and sports of high school and especially at f4.0 while so far he did not much difference. But a month ago did a session of short portrait for a friend, and that's where I discovered the inconsistancy. Back so that my question is if there is a 'normal' variation in AF or I have to send my 7DMII in for repair. Thanks for your opinions.

Marc

Marc13579 wrote:

"Which focus mode and shooting mode do you use?  When I proceeded to the AFMA adjustments, I make several times under different lighting conditions and take the average results. »

I've shot with only one reader, with the help of simple point AF using the center point, locking the mirror upward, and with the help of a two second timer to make sure I wasn't misleading no matter what camera shake with my hands.

When you say "..." "under different lighting conditions and take the average of the results", I must confess that I do not consider that. However as you can see I had a little different lighting under one condition, so how do we take an average in different conditions?

Or... and this could certainly be a possibility... I'm more thinking about this?

Marc

First + 1 Department of Foreign Affairs would not significantly change in the home.

6 photos no there wasn't that one was the development plan was not in the depth of field for the lens.

I don't think that there is nothing wrong with your camera.

I PM you had a link to an article by lensrentals.com. They are a great resource, they have many copies of lenses and cameras to work with and Roger Cicala has a good understanding of the work of the gear. The link that I sent is one of the many articles that Roger did on AF. They are all worth reading.

Tags: Canon Camera

Similar Questions

  • Cannot change the Variation Ebay ads (works on other browsers) wishes to use on Firefox

    When I try to edit my ebay for the type of Variation listings - no window opens for the amounts or change the images, the screen just POPs, it's driving me crazy, was like him for about a week now (can change everything is ok with other browsers)-all worked before. Mozilla is my preferred choice (summer use it for years - love it!) but I can not continue like this continue to IE just change... what you intend? someone? anyone? When we look through your questions and answers, I see quite a few other people have this problem, but no one seems to have solved - perleease help! d

    Follow the suggestions mentioned in the following articles:

    Check and tell if its working.

  • I can access more variations is Ebay listing after the upgrade

    After the upgrade of my Firefox on 3.01.2012 I can no longer variations of the access list or change the prices on these Ebay listings. Other changes within the site appear to be not affected.

    Tried the update of Java. Does not solve it.

  • Variation of thermal EMF of the PXI-2530 modules

    This message/question is a companion of my the most recent message in another thread.

    In addition to watching some resistance higher than expected that affected current measurements using modules PXI-2530 multiplexer 4W topology, I saw systematic variation in track-to-track blood pressure measurements. Tensions would increase gradually through the 16 channels in a configuration by measuring the voltage at the terminals a resistor 1.5 kOhm with 0.5 au crossing (75 uV). I've identified that the thermal EMF of the reed in the PXI2530 module switches is on the same order of magnitude of these measures and set out to quantify the differences EMF thermal track-to-track between my three modules.

    Test method: I have a TB-50 which is configured to mux the signals of tension for a DMM. I connected each of the four DB-50 one cable of 176 pins to this block and collected with a PXI-4071 pressure readings set to 7.5 digits precision in the range of 100 mV and > 10 GOhm impedance. For most channels, it took several minutes for the voltage stabilize - or at least appear that it was to stabilize.

    I enclose three graphs. Note that the vertical scale is the same on each.

    Data that triggered this survey was collected with MUX1, via connector P2 to voltage. The magnitude was not quite the same-probably related to the phenomenon of stabilization time, but obviously the worst group of channels three multiplexer modules.

    The three modules were all bought at the same time (about 2 years ago), but had only limited its use in the first year or more. The three now have various 'mileage' based on my use. But MUX1 clearly behaves differently two other modules. The

    I changed my test conditions to spend 0.5 au via a higher resistance to thermal EMF less important. The PXI-2530 sheets indicate that thermal EMF must be less than 50 uV. In most of my measurements, it is. But not for MUX1!

    Any thoughts?

    Thank you

    Jeff

    Hi Jeff,

    You can check that all the three modules are PXI-2530, not PXI-2530 b (while, as the PXI-2530 b parts slightly higher thermal emf)?

    Specification of emf thermal 50uV of the PXI-2530 is a typical value, is not a guarantee of spec.  See a few channels higher than the spec is not a cause for alarm, but it shows that we must take account of this in our measurement error.  Note that the industry standard for the technical measure thermal emf is to close the relay, wait a few minutes and then take a measure of tension.  For example, if you scan through a switch faster than a relay per minute or so, the thermal emf will be less predictable and stable.  A single module performs worse at these low voltages is not indicative that this module is a failure, etc. the module is fine.  Unfortunately, the reed relays have more emf thermal relay of the armature, mainly because of the many layers of metal in a Reed compared to a frame (each metal junction is a source of emf if these metals are not the same).

    Thermal EMF is proportional to the temperature, it may be interesting to note the position of the chassis of the less powerful module.  Placing hottest modules (scanners, Ara, RF, etc.) will reduce the thermal emf.

  • Variations on the entrance table

    Why I can't get a picture of variats as a control?

    After you have created one, I got error saying:

    Cluster 'nothing': control contains no elements and is not defined.

    I have developed a few table manipulation code which should work with different types. Why can't the variants of the ise?

    Ok

    My mistake.

    I constantly used to cluster instead of Variant.

    Table of variants is possible.

  • Great variation on thermocouple readings

    I have to type K thermocouples (two long wires twisted and welded at the end) connected to a map of SCC - 68 (without modules). This card connects to a data acquisition NI PXI-6221 multifunction with compensation of CYC.

    I have install a global channel virtual for the CCM, connected according to the diagram in the user manual, etc, etc-, that everything seems to work fine. When I connect my thermocouples, however, their readings are very sporadic; they could go from 69 degrees F up to 89 degrees F or more.

    Suggestions as to how I can get a more uniform reading? Honestly, I don't care if it jumps around a few degrees, but variations of 10 to 20 degree seem a bit much.

    I have attached a copy of my VI (LabVIEW 8.2) that I use to display temperatures (it's part of a larger system of control, so ignore everything except areas thermal two on the left ).

    Can be measured in differential mode?

    How the signal look like? UM, cleats, white noise?

    What about using a filter? Try fist: enjoy with 1kS/s and uses the average of 300 samples (work of 300ms for 50 Hz and 60 Hz power line noise)

  • Color variation of Windows 7 on two screens despite the correspondence of the monitors, model, connection & settings

    I'm managing about 20 machines to windows 7 64 bit, but have noticed that, in each of them with two screens, there is a slight color variation (right monitor being darker and more colorful) between the two monitors despite the monitors of the same brand and model (workstation make & models vary).

    As a test I switched monitors and the problem remains.
    I also tested the type of connection cable / in case the fault is due to the difference between VGA/DVI but the prob persists indicating is not the screen, indicating that it is to the BONE (the denominator) as graphics cards vary also in the brand/model.
    would be very happy for any help you can offer
    Thank you

    Hello

    The question you have posted is better suited for the TechNet forums. You can post the question on the link below.
    http://social.technet.Microsoft.com/forums/en-us/categories/

    I hope this helps!

  • Alert to variation of Muse - block of text - not supported

    Hello

    I just changed the text on my website to Verdana web fonts Dosis, which I installed it. DOSE does not have an italic version, which is fine. But wherever I used Verdana italic earlier and preview in a browser, I now get a warning will appear indicating, for instances of 36:

    «Block of text on the "Home" page uses a variation unsupported "italic" from edge Web font named "Dosis medium".» Italics will be simulated. »

    Seen in the browser these words that had already been put in italics when I used Verdana are now italicized in the dose in the browser. I do not see the warning (x 36) whenever I saw in the browser. I want especially to ensure that this do not cause any problems when I'm done with my design and publish it.

    Please notify.

    The italic shape of Dosis you see in the browser is a false "italics" artificially simulated by the browser sloping forms of the letters. This usually results in an unnatural feel compared to a true italic, but if you are satisfied with the appearance, feel free to use it; It will not have any other "problems." However, there is no way to silence warnings from the time of export, if you decide to go with the fake italics.

    Abhishek

  • When printing using EPSON L 210, I get variations of color, what can be done for this

    I use windows 10 when taking print with color variation is epson210 iam printer is there any possible solution

    Hi n.sundararar,

    You can try to calibrate the colors of the printer correctly.

    Reference: Printer calibration: how to calibrate your photo printer?

    Let us know if that helps.

    Kind regards

    Mohit

  • What happened to the Variations of the adjustments and how I get it back? I have Photoshop CC 2015.

    Photoshop CC 2015 version 16.0.

    Windows 10.

    Hi VoidGhost,

    Variations has been removed from the version of Photoshop Creative Cloud.

    Levels, curves, Hue/Saturation. They all allow you to do the same thing, but the user interface is very different. And even aren't the only options, there are a lot of ways to spend the balance of the colors in a picture.

    Kind regards

    Tanuj

  • What happened to the 'Variations' Image option > settings?

    Variations is a useful option, given that I could get an overview of the results of the changes/hue/saturation and mix them easily. Why this tool is left? What reason was there to remove it? And how do I get it back?

    Kit Thornton

    Variations has been removed a few years ago because it was old code and they decide to not modernize.

    But if you want to vote to bring new, there is an existing request for it on the site of the feedback from Photoshop:

    Photoshop: Variations want tool/setting returned

  • CS 6 character palette and variations does not

    Hi all!

    I'm hoping to get some help here. Seemingly out of nowhere my character the pallets and pallets of the toolbar have totally bugged. Whenever I try to select a font, one which seems to be a corrupt, blank menu down. See attachment. I am able to type a font name in the field. But can not change the type variation either. the <>do not respond.


    I "m on El Capitan OS X on a macbook 2012 pro and worked very well. I use InDesign professionally for more than 10 so I'm quite knowledgeable and aware what is happening but this really is apparently out of nowhere. Nothing has changed in my environment. I tried to remove the "InDesign SavedData" in InDesign cache and "InDesign Defaults" in preferences, but nothing helped. In fact, I deleted the whole folder "en_US" and had InDesign that rebuild them but the app would crash constantly after the start. I replaced the old records and tracks of the app, but remains the question of the character.


    Anyone have any ideas?


    Thank you


    George


    Screen Shot 2015-11-21 at 8.50.58 AM.png

    You have unchecked "automatically hide and show the menu bar" in the preferences system El Capitan on the general tab?

    Having said that CS6 is not supported under El Capitan, you should consider upgrading to InDesign CC2014/2015.

  • Why omit Photoshop elements 14 for the selection of Color Variations in the color "adjust" knocked down? That was helpful. What do you suggest me to use in a place?

    Why omit Photoshop elements 14 for the selection of Color Variations in the color "adjust" knocked down? That was helpful. What do you suggest me to use in a place?

    If you have a copy of PES 11 or earlier version, you could install it and use it for this.

    You can apply here:

    Feature request/Bug Report Form

  • CC PS can you access all stylistic variations of the character Panel?

    I posted this question in a forum that already had a similar question in it, but now I realize it was probably the wrong forum (Adobe Type forum) so I'm re-publishing in the Photoshop forum.

    With Photoshop CS6, I am not able to access all stylistic variations from the character Panel OTF font. I've been going to Illustrator and selecting the glyph wished in the glyphs Panel instead. I think that I read that PS CC now has an its own glyphs Panel, but I would like to know if the character Panel now allows you to scroll through all the available substitutes without having to go through a glyphs Panel. This would be a feature that would make me consider to subscribe to PS CC.

    Hi acresofgreen,

    No, there will be another sign for glyph, but you can add it to the character even Panel and save your workspace so that you don't have to fix it every time:

    Concerning

    Sarika

  • problem with the variation of size control: pen pressure

    Hello. I have a problem when I put my brush to put on line art form, size and dynamic variation of the pen pressure. but nothing need help.

    Sometimes not much, when I have to be more specific. but you will pass one that I get really brush pressure control and the line remains the same

Maybe you are looking for

  • Transfer photos from PC to iMac

    Hello Two years ago, I decided to scan and put all our family photos in digital format (some will to the 1890s), which I just finished several months ago.  I used a Windows operating system and the PC to manage the process. Recently, I poured out my

  • Compaq cq58: my compaq cq58 is said admin password, enter

    my computer says enter the password admin or power on password

  • Xbox Live Gamertags inactive

    Hello, let me start by apologizing if in the wrong category. Xbox Live site put me in here for support, but absolutely no option category has anything with the Xbox. I tried to get a particular gamertag since I'm on Live 8 or 10 years. It was taken e

  • XT307EA #BED: graphics card problem

    Hello I got this HP 3300 MT Pro PC for like 5 years, before 2 or 3 years I bougt garage new graphics card: ATI Radeon XFX 7750, I plugged it and it worked just fine until one day, I plugged on the Ultra HD TV via HDMI cable, and after he went to slee

  • ImageBrowser and SQLITE3 database files

    Hello Does anyone tried to access the IBX ImageBrowser 1.5.2 using SQLITE3 database files? If I do, SQLITE3 displays "ERROR: file is encrypted or is not a database etc. For a long time, I have a system of DB2 database with all the features on my phot