Jump to content

Suggestion: new AF-S One point autofocus grid


Recommended Posts

Advertisement (gone after registration)

Hello, I just want to share this idea with you.


I find the AF-S square in One point too big and innacuratte, specially when using wider focal lengths. Sometimes the AF miss and the focus goes to the background of the subject in the square.


The grid from AF Zone is much better and precise with more and smaller squares so... why don´t Fuji give us the same grid in One Point mode? I don´t know if it would be possible but for me that would make a 10/10 camera. Precision is the only thing I´m missing in the XT-1







What do you think?



Sorry for my english





Link to post
Share on other sites

Thank you for your coment. I agree with you. I doub they could go from 49 AF points to 77 AF points just with an FW update. But at least using the size of the AF Zone squares in the AF Point would be an improvement in precision. That seems possible to do.


PD. What confuses me is that the camera detects the 77 points as individuals when using the AF Zone grid but maybe that is not "real" information...

Link to post
Share on other sites



My experience is also that using the smallest of the size is what makes lenses like the 60mm be less precise rather than more! The smallest of sizes causes the lens not to be able to focus. Put it one step up and all works a lot better.


I had the  10-24 which is the shortest of the AF lenses and I’ve never felt the need for a smaller af point!  Now I have the 12mm Samyang ( manual focus) which I rarely focus!

Link to post
Share on other sites

Again thank you for sharing your experience! I´ve just finished some focus testing for 18mm and 23mm focals with a tripod. Testing both, the smaller square focus and the step up bigger square focus.


At 18mm the focus is clearly better with the smaller square. The same at 23mm. And this is with a tripod and still object... shooting with handheld and people... this gets much worse. So I still think we need a smaller square.


Here is the test, there is a quality lose in both ways, but if you can´t see it at 100% size try this: http://1drv.ms/1MsPAmM




Edit: I don´t own the 10-24 anymore,  but I tested a few weeks ago and as long as I was going wider with the focal lenght the focus lose got worse, that´s why I gave it back. (Fuji please... smaller points  :) )



Link to post
Share on other sites

Interesting results! I've always found that in real life the smallest and biggest focus point sizes give the least reliable results because the small one fails so often and the large one misfocuses so often. 


You're analyzing some very precise focus here with a very convenient subject (i.e. tons of tiny vertical lines) so it makes sense the smallest point works the best and is a good test for your purposes. 


Personally I'd support Fuji making a smaller focus point. It could just be an even smaller box that's smaller than the cross. That said it may not be a meaningful change, I suspect the current smallest size reflects the actual limits of precision for the AF engine, in which case a smaller box would do nothing. 


Hope they're working on it either way! I need to remember to be more careful about AF box size and make it smaller when there's enough light+contrast for it to still work.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Posts

    • I must have activated the wrong setting because now when I switch to the OVF the white windows stays for a second and then completely disappears. Any idea how to get it back? Thank you all so much. 🙂
    • No thunder stolen. If you read to the end of my article you'll see (in the section "Resources") I have a link for Simon Weir's site. I also have two other links on there with various IR tests. My article is only Fuji-centric because that is my system of choice though I've done a ton of IR work with Sony FF as well. I consider the sites for which I provide links to be complementary and I wish there were more sites out there evaluating for infrared. Although I test for infrared quite thoroughly I can only afford so many lenses. The eight Fuji mount lenses shown in my article I bought myself. In fact, same with the Sony and Micro 4/3 with the exception of the two Sony APS-C zooms that were rented. Also when I get new lenses, I'll update the article on my blog. I can't update the PetaPixel one as they just republished what was on my blog at the time. I have recently shot with the Voigtlander Nokton 35mm f1.2 Fuji-X and 7Artisans 35mm f0.95 Fuji-X. After trying 2 samples of the Voigtlander I returned them both but mainly for their strange and unacceptable (for my work) performance with resolution. Regarding IR, the Voiglander is free of hotspots from 1.2 through about f3.5. I'm impressed with the 7Artisans overall but it only works for IR at wider apertures (f0.95 through about f2.8.) Then again that's why you buy an f/0.95 lens. Thanks for the feedback. Happy shooting! Joel
    • Yes I don’t blame you. I’ll always have some Fujifilm gear. But if they don’t upgrade their gear in the next 3 months I’m going to go back to Canon for a lot of my work. I really love Fujifilm for all the right reasons but it’s faults are getting in the way of my work at this point.
    • You're welcome. I still use my X-Pro2 for personal work every now and then, but I replaced the X-H1 (and the rest of the Fuji-kit) with a Z7II-based kit and I'm very satisfied with that move.
    • That’s a lot of great info. I’m gonna explore those options. I don’t really wanna get an XT4 at this point. (Come on X-H2!) Thanks!
  • Create New...