Sigma 150-600 mm BOKEH
Feb 6, 2017 20:31:42 #
Normally I am very satisfied with the bokeh created by this lens, but...on occassions it creates strange bokeh. Don't understand why or how.
I have posted 3 examples of good bokeh and 2 that I don't like. One of you smart, technical wizards" how about making me smart. What is the story that I do not understand?
Thanks in advance!
I have posted 3 examples of good bokeh and 2 that I don't like. One of you smart, technical wizards" how about making me smart. What is the story that I do not understand?
Thanks in advance!
Feb 6, 2017 21:11:00 #
Most of the undesirable effect is due to too much contrast increase applied to out of focus areas, making them look grainy with exaggerated, very unnatural patterns. As you may notice in the second image, the contrast level of the (out of focus) background was fairly low to begin with, so increasing the contrast has had hardly any negative impact at all.
The solution is to apply contrast adjustments to background and subject separately and independently with the brush and/or selection tools; usually more contrast for the subject, less for the background and other areas not in focus. Allow the out of focus areas appear soft and low contrast... as they should!
The solution is to apply contrast adjustments to background and subject separately and independently with the brush and/or selection tools; usually more contrast for the subject, less for the background and other areas not in focus. Allow the out of focus areas appear soft and low contrast... as they should!
Feb 6, 2017 21:20:07 #
rook2c4 wrote:
Most of the undesirable effect is due to too much ... (show quote)
Thank you. Now I am learning.
Feb 6, 2017 21:27:28 #
IMHO
I'm no expert, but if you are using AF mode, it appears that the shutter is being
tripped before the subject is completely in focus.
I'm no expert, but if you are using AF mode, it appears that the shutter is being
tripped before the subject is completely in focus.
Feb 6, 2017 23:12:17 #
UXOEOD wrote:
Thank you. Now I am learning.
Do this over... and post images that include the Exif data. Of these, only one, has Exif data.
Of particular importance is knowing the aperture and the ISO for each image.
Feb 7, 2017 02:34:22 #
UXOEOD wrote:
Normally I am very satisfied with the bokeh created by this lens, but...on occassions it creates strange bokeh. Don't understand why or how.
I have posted 3 examples of good bokeh and 2 that I don't like. One of you smart, technical wizards" how about making me smart. What is the story that I do not understand?
Thanks in advance!
I have posted 3 examples of good bokeh and 2 that I don't like. One of you smart, technical wizards" how about making me smart. What is the story that I do not understand?
Thanks in advance!
I think it's just that lens , it's not really noted for good bokeh
(blurr )
Feb 7, 2017 06:48:45 #
Feb 7, 2017 09:06:53 #
The bokeh depends upon the aperture and distance. Without this information, we cannot give you an informed answer. However, a much bigger problem is that none of these shots are sharp. I have the Contemporary version of this lens and it is very sharp.
Feb 7, 2017 10:52:09 #
catchlight..
Loc: Wisconsin USA- Halden Norway
Agree that post prepossessing can help get the best out of the effect of bokah without adding to the problem.
Leave the back round as shot by using a layer mask or even use a Gaussian blur filter and layer mask to smooth slightly.
When you sharpen try "Blend If" in Photoshop with a High pass filter to protect the back round or in Lightroom/ Photoshop RAW filter use "Alt" and slide the mask button in the sharpen section to do the same.
Leave the back round as shot by using a layer mask or even use a Gaussian blur filter and layer mask to smooth slightly.
When you sharpen try "Blend If" in Photoshop with a High pass filter to protect the back round or in Lightroom/ Photoshop RAW filter use "Alt" and slide the mask button in the sharpen section to do the same.
Feb 7, 2017 10:55:29 #
rook2c4 wrote:
Most of the undesirable effect is due to too much ... (show quote)
Great advice!
Lenses will show different bokeh based on distance to camera, distance from background, aperture, contrast in the background, etc. And to make matters even more confusing, small adjustments in any of the factors can mean the difference between great and awful bokeh. Post processing is your friend in situations were bokeh is strange. Lens blur, gaussian blur, applying a Orton "glow" effect on the background, etc. - there are a number of techniques that can be used to address this. But it seems that only the first image is actually sharp - the rest are pretty much out of focus or there is some camera movement.
Feb 7, 2017 11:36:56 #
Feb 7, 2017 13:30:57 #
Feb 7, 2017 13:39:28 #
I have a different answer, you need a very sturdy tripod and a shutter release, the slightest movement changes the Bokeh. I found that out the first day with that lens. Ittakes some getting used to. I'm still learning to get it right. A friend has one and never shoots at less than 1/2000 just for that reason.....
Feb 7, 2017 21:03:44 #
I have the 150-600mm SigmaC lens. Never shoot under 1/1600 at full extension. (I have a crop and FF Canon). As other posters have noted, the images are not sharp. It may be due to focus or shake. Given there is no part of the image that is in focus, then shake is probably the answer. Crank up the shutter and ISO to get right exposure and see if that helps. (Other posters notes on post processing and contrast will help but I would start with a sharp photo first. (took me a while to figure out that I needed to be at min 1/1600....600mm on 1.6 Canon crop camera = 960mm. 1/2000 is even safer. Good technique can get you below 1/1000 but you will need to be steady.)
Feb 7, 2017 21:07:16 #
crazydaddio wrote:
I have the 150-600mm SigmaC lens. Never shoot unde... (show quote)
You can go down to 1/125 if you use a good tripod with this lens.
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