Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Nikon DSLR Cameras
D7100
D7100 Inconsistent autofocus. Backfocus / front-focus
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="guillermo_arp" data-source="post: 661253" data-attributes="member: 40887"><p>I noticed the problems with the 24mm 1.8. I saw the photos and thought to myself... Crap. </p><p></p><p>1 first photo is the whole portrait (A shelter for women with mental issues in México)</p><p>2 Second photo is a crop of the face.. Out of focus</p><p>3 Third photo a crop of the hands. </p><p></p><p>My technique is as follows: 1. Frame the picture, 2. Manually Select the sensor closest to one of the eyes. 3. Auto Focus 4. Take the shot. </p><p></p><p>When I got home I made some tests using the 35mm 1.8 DX. Steady target, camera on tripod. I noticed focusing problems (sometimes it focused in front, sometimes in the back). </p><p></p><p>To confirm I switched to the 50mm. At 1.4 narrow depth of field can emphasize any focusing issues. So I made some more tests, same methodology as before, and results were very clear, AF is inconsistent. </p><p></p><p>I didn't test the 24mm 1.8 due to its larger depth of field.</p><p></p><p>I sent the camera, along with the 50mm for service. So I'll keep you posted. </p><p></p><p></p><p>QUESTION about micro-adjustment. Is it completely necessary? --- For example: Brand new lens. One gets the lens to focus perfectly with a micro adjustment of +4. In my mind, micro-adjustment should be used only when something is <strong>wrong</strong>. Maybe a busted/old lens or a camera with a faulty sensor. But it should not be something that needs to be performed with factory new equipment. That's what I believe but I might be wrong here. </p><p></p><p>How often do you micro-adjust your bodies / lenses? </p><p></p><p>FULL SIZE portrait, taken with the 24mm at 1.8, ISO at 640 (just some crop to reduce file size) </p><p></p><p><img src="https://images.nikonites.com/gallery/files/4/0/8/8/7/feb_color_b_n_mod.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p> CROP of the face... soft, out of focus. </p><p></p><p><img src="https://images.nikonites.com/gallery/files/4/0/8/8/7/feb_color_b_n_mod-2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>Crop of the hands, with a little bit of motion blur</p><p></p><p><img src="https://images.nikonites.com/gallery/files/4/0/8/8/7/feb_color_b_n_mod-3.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="guillermo_arp, post: 661253, member: 40887"] I noticed the problems with the 24mm 1.8. I saw the photos and thought to myself... Crap. 1 first photo is the whole portrait (A shelter for women with mental issues in México) 2 Second photo is a crop of the face.. Out of focus 3 Third photo a crop of the hands. My technique is as follows: 1. Frame the picture, 2. Manually Select the sensor closest to one of the eyes. 3. Auto Focus 4. Take the shot. When I got home I made some tests using the 35mm 1.8 DX. Steady target, camera on tripod. I noticed focusing problems (sometimes it focused in front, sometimes in the back). To confirm I switched to the 50mm. At 1.4 narrow depth of field can emphasize any focusing issues. So I made some more tests, same methodology as before, and results were very clear, AF is inconsistent. I didn't test the 24mm 1.8 due to its larger depth of field. I sent the camera, along with the 50mm for service. So I'll keep you posted. QUESTION about micro-adjustment. Is it completely necessary? --- For example: Brand new lens. One gets the lens to focus perfectly with a micro adjustment of +4. In my mind, micro-adjustment should be used only when something is [B]wrong[/B]. Maybe a busted/old lens or a camera with a faulty sensor. But it should not be something that needs to be performed with factory new equipment. That's what I believe but I might be wrong here. How often do you micro-adjust your bodies / lenses? FULL SIZE portrait, taken with the 24mm at 1.8, ISO at 640 (just some crop to reduce file size) [IMG]https://images.nikonites.com/gallery/files/4/0/8/8/7/feb_color_b_n_mod.jpg[/IMG] CROP of the face... soft, out of focus. [IMG]https://images.nikonites.com/gallery/files/4/0/8/8/7/feb_color_b_n_mod-2.jpg[/IMG] Crop of the hands, with a little bit of motion blur [IMG]https://images.nikonites.com/gallery/files/4/0/8/8/7/feb_color_b_n_mod-3.jpg[/IMG] [/QUOTE]
Verification
Post reply
Forums
Nikon DSLR Cameras
D7100
D7100 Inconsistent autofocus. Backfocus / front-focus
Top