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#31
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Savageduck insisted
On 2015-07-29 19:41:44 +0000, Bill W said:
On Wed, 29 Jul 2015 15:17:19 -0400, PeterN wrote: On 7/28/2015 11:35 PM, nospam wrote: In article , Bill W wrote: What is 3D tracking? My problem at this air show location with all those focus points is that it will start focusing on the power lines, trees, mountains, clouds, etc. Does it mean that it tries to track objects that are at a consistent distance? My Pentax does not have that option, so it might be moot anyway. http://www.nikonusa.com/en/Learn-And...i4lx/3d-focus- tracking.html An invaluable feature for sports, action and wildlife photography, 3D focus tracking, available in select Nikon D-SLRs, automatically shifts the focus point to follow the movement of the subject. With the shutter release pressed halfway, you'll see in the viewfinder the lens continuously maintain focus as the subject moves. However, maintaining focus doesn't guarantee a sharp image, as there is a short time lag between the release of the shutter and the capture of the picture. To solve this problem, the focus tracking system is a predictive system that uses special algorithms to forecast the position of the subject at the moment the image is captured. The prediction is based on a measurement of the subject's movement and speed. Okay, not exactly what I was thinking. If I use too many focus points, I too often end up focused on the wrong subject, but with too few, I lose the subject too easily after I lock onto it. It's just a matter of practice, I suppose. it depends on the focusing mode and given situation. no one mode is best in all cases, which is why there is more than one mode. here's a description of the various mode: https://photographylife.com/dslr-autofocus-modes-explained Yep! and as BillW stated, it takes practice. I don't think reading the manual in the field is very practical. Yep, what happens with smallish objects is that I can't find them in the viewfinder quickly enough, so then the camera starts to focus on background or foreground objects, leaving the lens completely out of focus for the subject I'm looking for, which then makes it harder yet to find. It's mostly me, but also the fact that I'm not using the best equipment for that sort of thing. Luckily, when something is just a hobby, one doesn't need the best equipment for anything. I can live with missed shots. It's not like I'm letting the Pulitzer get away. I don't know which Pentax you have, but I guessed at a K3 and took a look at the manual. That Pentax has a 27 AF point matrix, and has AF-S and AF-C options. The AF-C has options for Release priority (the shutter will release regardless of focus being locked), or Focus priority (the shutter will release only if focus is locked). It also has Tracking which will track the subject in focus. That does not seem to be quite the same thing as the Nikon Dynamic 3D Tracking. Of course if you don't have a K3 then you are going to have to check your camera's manual. -- Regards, Savageduck |
#32
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Savageduck insisted
On Wed, 29 Jul 2015 14:45:48 -0400, PeterN
wrote: On 7/28/2015 10:22 PM, Bill W wrote: On Tue, 28 Jul 2015 19:29:35 -0400, PeterN wrote: On 7/28/2015 3:25 AM, Bill W wrote: Okay, I was forced to post some air show photos: https://www.flickr.com/photos/489821...7654121813454/ Comments are welcome, but on the processing, of course. They're just planes in the sky, not much you can do with those as far as composition goes. Anyway, all work was done in LR, all photos were cropped, and all had at least some of the following adjustments: color temp, exposure, shadows, highlights, clarity, vibrance, saturation, and sharpening, and one photo used the haze removal slider (the one with the sun in the upper right corner). Those are the things I'm interested in comments on. I see after posting them that there is noise in the sky in some of them. I really need to look into that, but it might just be aggressive sharpening. I also failed to remove spots in a couple of the photos. I do need to learn to clean those lenses... What look are you trying to achieve. Try playing with levels /curves on a separate layer. Judicious use will cause your image to really pop. http://www.picturecorrect.com/tips/when-to-use-levels-or-curves-in-photoshop/ There are also some neat free tutorials on youtube. I wasn't trying to achieve any look, just hoping to get proper looking photos. They're just a bunch of planes flying around, but I was hoping that a couple of those images did pop, and thought at least a couple of them did. Many of them clearly didn't, but I at least wanted to get the WB, saturation, & exposure looking right. I do have PS, but I'm not using it much anymore, unless I need to do things that LR cannot do at all. I finally understand why people use LR. I used to just do what I needed to the raw file, and then save it as a tiff. Then one day I saw how large those tiff files really are - almost 10x the size of the original raw in some cases, and the light bulb went on. No more, unless absolutely necessary. These links are LR specific: http://www.peachpit.com/articles/article.aspx?p=2117243&seqNum=9 https://www.youtube.com/watch?v=qDq1JguOyv4 I find that if the black and white points are properly set there is much less need for for use of the clarity, vibrance or saturation controls. -- Regards, Eric Stevens |
#33
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Savageduck insisted
On 7/29/2015 3:37 PM, Savageduck wrote:
On 2015-07-29 19:14:47 +0000, PeterN said: On 7/28/2015 10:58 PM, Bill W wrote: On Tue, 28 Jul 2015 18:25:30 -0700, Savageduck wrote: BTW: This is an extreme example of why AF-C and multi-AF point 3D tracking can work to save a capture. This was an 8 frame burst with a fast right to left pass which was completed in 2.25 seconds. I was doing my best to hold to center, but not everything goes to plan. This shows where the AF point was when lock was made. Without the 51 point AF matrix I would have been SOL. https://dl.dropboxusercontent.com/u/1295663/FileChute/screenshot_238.jpg ...and here is the cropped final result after LR processing. https://db.tt/tEtHO81e What is 3D tracking? My problem at this air show location with all those focus points is that it will start focusing on the power lines, trees, mountains, clouds, etc. Does it mean that it tries to track objects that are at a consistent distance? My Pentax does not have that option, so it might be moot anyway. For my own bird shots I usually use one point focus. (left, right, or center.) At times when needed, I switch to five points. I think that fifty-one points can easily confuse the camera. The photographer is more likely to be confused than the camera. For fast moving targets (in my case planes, cars, and bikes, sometimes birds) AF-C together with 3D 51 Point Dynamic Area, and 3D-tracking has proven to be quite successful. The only failures have been due to me failing to hold at least one AF point on the target. I can suffer from pilot error as much as the next guy. I find it easier to use 51 point focus when the birds are comming towards me. For landscape I use hypoerfocal distance focusing, though sometimes I screw that up.) I think that this is where you replace "sometimes" with "mostly". Think what you will. -- PeterN |
#34
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Savageduck insisted
On 7/29/2015 3:41 PM, Bill W wrote:
snip Yep, what happens with smallish objects is that I can't find them in the viewfinder quickly enough, so then the camera starts to focus on background or foreground objects, leaving the lens completely out of focus for the subject I'm looking for, which then makes it harder yet to find. It's mostly me, but also the fact that I'm not using the best equipment for that sort of thing. Luckily, when something is just a hobby, one doesn't need the best equipment for anything. I can live with missed shots. It's not like I'm letting the Pulitzer get away. Several years ago I was so fascinated watching whales breach, that I forgot I had a camera. (And don't regret my failure to get the shots.) -- PeterN |
#35
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Savageduck insisted
On Wed, 29 Jul 2015 19:23:58 -0400, PeterN
wrote: On 7/29/2015 3:41 PM, Bill W wrote: snip Yep, what happens with smallish objects is that I can't find them in the viewfinder quickly enough, so then the camera starts to focus on background or foreground objects, leaving the lens completely out of focus for the subject I'm looking for, which then makes it harder yet to find. It's mostly me, but also the fact that I'm not using the best equipment for that sort of thing. Luckily, when something is just a hobby, one doesn't need the best equipment for anything. I can live with missed shots. It's not like I'm letting the Pulitzer get away. Several years ago I was so fascinated watching whales breach, that I forgot I had a camera. (And don't regret my failure to get the shots.) I'm certainly not the first to say this, but sometimes a camera can get in the way. |
#36
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Savageduck insisted
On 2015-07-29 23:23:58 +0000, PeterN said:
On 7/29/2015 3:41 PM, Bill W wrote: snip Yep, what happens with smallish objects is that I can't find them in the viewfinder quickly enough, so then the camera starts to focus on background or foreground objects, leaving the lens completely out of focus for the subject I'm looking for, which then makes it harder yet to find. It's mostly me, but also the fact that I'm not using the best equipment for that sort of thing. Luckily, when something is just a hobby, one doesn't need the best equipment for anything. I can live with missed shots. It's not like I'm letting the Pulitzer get away. Several years ago I was so fascinated watching whales breach, that I forgot I had a camera. (And don't regret my failure to get the shots.) ....but sometimes you can find a moment, or lapse of fascination, to record the event. https://db.tt/bjmbXh7S https://db.tt/dUnDwEpR -- Regards, Savageduck |
#37
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Savageduck insisted
On 7/29/2015 8:18 PM, Savageduck wrote:
On 2015-07-29 23:23:58 +0000, PeterN said: On 7/29/2015 3:41 PM, Bill W wrote: snip Yep, what happens with smallish objects is that I can't find them in the viewfinder quickly enough, so then the camera starts to focus on background or foreground objects, leaving the lens completely out of focus for the subject I'm looking for, which then makes it harder yet to find. It's mostly me, but also the fact that I'm not using the best equipment for that sort of thing. Luckily, when something is just a hobby, one doesn't need the best equipment for anything. I can live with missed shots. It's not like I'm letting the Pulitzer get away. Several years ago I was so fascinated watching whales breach, that I forgot I had a camera. (And don't regret my failure to get the shots.) ...but sometimes you can find a moment, or lapse of fascination, to record the event. https://db.tt/bjmbXh7S https://db.tt/dUnDwEpR Nice captures. Did the guy in the inflatable get swamped? -- PeterN |
#38
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Savageduck insisted
On 2015-07-30 00:38:53 +0000, PeterN said:
On 7/29/2015 8:18 PM, Savageduck wrote: On 2015-07-29 23:23:58 +0000, PeterN said: On 7/29/2015 3:41 PM, Bill W wrote: snip Yep, what happens with smallish objects is that I can't find them in the viewfinder quickly enough, so then the camera starts to focus on background or foreground objects, leaving the lens completely out of focus for the subject I'm looking for, which then makes it harder yet to find. It's mostly me, but also the fact that I'm not using the best equipment for that sort of thing. Luckily, when something is just a hobby, one doesn't need the best equipment for anything. I can live with missed shots. It's not like I'm letting the Pulitzer get away. Several years ago I was so fascinated watching whales breach, that I forgot I had a camera. (And don't regret my failure to get the shots.) ...but sometimes you can find a moment, or lapse of fascination, to record the event. https://db.tt/bjmbXh7S https://db.tt/dUnDwEpR Nice captures. Thanks. Did the guy in the inflatable get swamped? No, and it is a hard shell paddle ski-kayak, not an inflateable. -- Regards, Savageduck |
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