calibrating lens
Mar 30, 2023 23:56:55 #
lukevaliant wrote:
here are some pics you suggested to send,i know the eagle eyes are shaded,but it was "in focus"when i took the pic.
Taking the pic of the plane it is the only one where Nikon software ViewNXi shows the focus point. This 'suggests' focus was not acquired on the others, but this can never be relied upon 100%.
What is noticeable, with all images is that each are taken at ISO4000 with High ISO NR on 'High'. Not sure if this comes in at ISO4000 on your camera but something worth looking into.
What is also noticeable are the small apertures being used, plane f/20 and eagles f/18. The small bird far better at f7.1. The small apertures are unnecessary for those subjects and will give you reduced sharpness due to diffraction.
The images presented really can not demonstrate if you have a lens near or rear focus problem.
Mar 31, 2023 02:32:39 #
I looked at only the first image to find some concerning exposure settings.
Mar 31, 2023 02:54:09 #
The bird shows out of focus with reasonable exposure settings, rather than a need for calibration. The EXIF reports the AF-C 'continuous' setting. But, there are no active AF points used when this image was captured.
Mar 31, 2023 03:00:17 #
lukevaliant wrote:
here are some pics you suggested to send,i know the eagle eyes are shaded,but it was "in focus"when i took the pic.
For the eagle and sparrow images, the camera is set to AF-C, but no active AF points appear in the image EXIF.
For your shooting technique, are you half-holding the shutter button to engage the AF? If you've configured Back-Button-Focus (BBF), are you actively holding the configured BBF as you focus, and compose, and engage the shutter to capture images?
Mar 31, 2023 21:20:23 #
CHG_CANON wrote:
For the eagle and sparrow images, the camera is set to AF-C, but no active AF points appear in the image EXIF.
For your shooting technique, are you half-holding the shutter button to engage the AF? If you've configured Back-Button-Focus (BBF), are you actively holding the configured BBF as you focus, and compose, and engage the shutter to capture images?
For your shooting technique, are you half-holding the shutter button to engage the AF? If you've configured Back-Button-Focus (BBF), are you actively holding the configured BBF as you focus, and compose, and engage the shutter to capture images?
i always use single point focus,i don't know why it shows no active points.(unless i don't understand what active af points is)and i always use bbf. maybe not the "sweet spot"aperatures? i appreciate your help as always,luke
Mar 31, 2023 21:36:08 #
Grahame wrote:
Taking the pic of the plane it is the only one whe... (show quote)
thank you ,i will take all of your advice,i thought iso was ok at 4000 ,but the High setting is something i don't understand yet ,i will study that ! i think you are correct about the aperture too, others have suggested the same thing.Luke
Mar 31, 2023 21:43:51 #
thanks everyone for your patience and help, i'm gonna figure this out hopefully sooner than later,Luke. before i try to callibrate anything!!
Mar 31, 2023 21:43:53 #
lukevaliant wrote:
thank you ,i will take all of your advice,i thought iso was ok at 4000 ,but the High setting is something i don't understand yet ,i will study that ! i think you are correct about the aperture too, others have suggested the same thing.Luke
With my BBF cameras, I press the assigned button with my thumb and hold the AF active as I track any subject. Then releasing the shutter with my index finger, thumb still holding the BBF.
For the apertures, you'll have the best success in the f/5.6 to f/13 range with this 200-500 zoom. Consider leaving the VR active at all times.
Let us know how things go with these changes to your equipment settings and technique.
Mar 31, 2023 21:51:06 #
i use the bbf the same way,i will try the aperture settings next,and the vr on too,(i thought that was only for 1/500 and below)thanks again. i will report back!
Mar 31, 2023 21:54:41 #
lukevaliant wrote:
i use the bbf the same way,i will try the aperture settings next,and the vr on too,(i thought that was only for 1/500 and below)thanks again. i will report back!
The VR helps stabilize the viewfinder as you track moving subjects.
Mar 31, 2023 21:59:15 #
CHG_CANON wrote:
The VR helps stabilize the viewfinder as you track moving subjects.
Apr 1, 2023 18:31:57 #
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