Star Lens Test # 1 Tamron 28-80mm
Jul 28, 2013 12:54:06 #
According to direction
1st photo in Live View for AF-S lowest apeture
2nd photo after un-focusing and let AF-S focus for 2nd shot
3rd photo " " " 3rd shot
Shots 2 and 3 with viewfinder - not live view
Critique please with download
Sarge69
1st photo in Live View for AF-S lowest apeture
2nd photo after un-focusing and let AF-S focus for 2nd shot
3rd photo " " " 3rd shot
Shots 2 and 3 with viewfinder - not live view
Critique please with download
Sarge69
Tamron with Live VIew
2nd shot after refocusing not live view
3rd shot after refocusing not live view
Jul 29, 2013 05:28:32 #
donb99
Loc: Silver Spring, MD
Sarge69 - What are you trying to test here? It seems as though all three images are slightly different sizes as presented, so apparently the taking distance has been varied for each exposure. Plus, my understanding of the star test chart is that it is mainly useful for detecting astigmatism.
As for what can be deduced from the images, they all look reasonably sharp, in focus, and free from distortion.
As for what can be deduced from the images, they all look reasonably sharp, in focus, and free from distortion.
Jul 29, 2013 07:54:26 #
donb99 wrote:
Sarge69 - What are you trying to test here? It seems as though all three images are slightly different sizes as presented, so apparently the taking distance has been varied for each exposure. Plus, my understanding of the star test chart is that it is mainly useful for detecting astigmatism.
As for what can be deduced from the images, they all look reasonably sharp, in focus, and free from distortion.
As for what can be deduced from the images, they all look reasonably sharp, in focus, and free from distortion.
Probably due to directions saying to completely unfocus images between shots from the Autofocus which was the first. Changed the focus distance a little. But your statement matches my assessment of the sharpness of the images. Thanks for taking the time to check and give me the word.
Sarge69
Jul 29, 2013 16:18:31 #
I do think that #'s 2 and 3 are sharper than the first. But I could be having a 'bad eye day'. lol
Jul 29, 2013 17:42:17 #
You might want to adjust the white balance and/or exposure compensation for this comparison. Since I imagine that you metered on the focus sheet, it rendered the white paper gray. Otherwise the three photos seem about equal.
Jul 30, 2013 00:12:57 #
Since it has been a couple of years since new glasses I think #3 looks the sharpest, maybe because it's zoomed the most...Norm
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