lens tests.
yesterday, I tested focus on terrestrial subjects for the 324/85 and the 70/100
No surprise, at 24, the wide angle was not in focus at the infinity marking.
Nope, it was between the infinity marker and 4 on the focus ring.
Tests at 85 mm showed a different focus point, as did the 70/300.
So for reference, here are the results: (for a focus at infinity)
24 mm : Between infinity and 4
85 mm : Middle of infinity mark
70 mm / 300 mm: Markings are difficult to align there is no real mark to show you where you are. autofocus and visual focus are accurate.
Manual focusing using live view was accurate
the autofocus was accurate
Test on star - Stepped outside this AM, and tried star images. STILL muddy.
I think I need to do a series just of stars. Do it with both the 24/85 and 70/300. Stop down the lens on some other tests.
Other items:
I have found a paper that said that 100 ISO was the proper setting to do astro photos with. I need to read and understand
need to learn lightroom,
Need to try time lapse
Need to try video at night.
yesterday, I tested focus on terrestrial subjects for the 324/85 and the 70/100
No surprise, at 24, the wide angle was not in focus at the infinity marking.
Nope, it was between the infinity marker and 4 on the focus ring.
Tests at 85 mm showed a different focus point, as did the 70/300.
So for reference, here are the results: (for a focus at infinity)
24 mm : Between infinity and 4
85 mm : Middle of infinity mark
70 mm / 300 mm: Markings are difficult to align there is no real mark to show you where you are. autofocus and visual focus are accurate.
Manual focusing using live view was accurate
the autofocus was accurate
Test on star - Stepped outside this AM, and tried star images. STILL muddy.
24 mm focus at inf-4
Note leaves appear to be sharp.
I think I need to do a series just of stars. Do it with both the 24/85 and 70/300. Stop down the lens on some other tests.
Other items:
I have found a paper that said that 100 ISO was the proper setting to do astro photos with. I need to read and understand
need to learn lightroom,
Need to try time lapse
Need to try video at night.
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