Archive 2018 · Bokeh Balls and Onion Rings "Oh My"

GMPhotography
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p.6 #1 · p.6 #1 · Bokeh Balls and Onion Rings "Oh My"

So maybe a silly question but maybe nice to know. What I’m seeing here is lenses that are Flat field like the Sony 24/50 have less cats eye. So this begs the question is cats eye more a flat field / FC issue or more about the curve of elements in the lens. Why I ask also is in every lens we have seen it’s outside the center area where we see more of it. So I’m assuming it’s either The element curve of the front end elements or more about field curvature. Or something else

Thoughts?

Dec 13, 2018 at 11:47 PM

Fred Miranda
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p.6 #2 · p.6 #2 · Bokeh Balls and Onion Rings "Oh My"

GMPhotography wrote:
So maybe a silly question but maybe nice to know. What I’m seeing here is lenses that are Flat field like the Sony 24/50 have less cats eye. So this begs the question is cats eye more a flat field / FC issue or more about the curve of elements in the lens. Why I ask also is in every lens we have seen it’s outside the center area where we see more of it. So I’m assuming it’s either The element curve of the front end elements or more about field curvature. Or something else

Thoughts?

I think it's just coincidence. "Cat-eyes" is caused by optical vignetting.

Dec 13, 2018 at 11:50 PM

GMPhotography
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p.6 #3 · p.6 #3 · Bokeh Balls and Onion Rings "Oh My"

Interesting I would not have guessed that Fred.

Dec 13, 2018 at 11:54 PM

gunmetal
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p.6 #4 · p.6 #4 · Bokeh Balls and Onion Rings "Oh My"

I still have the 18mm to test (not sure why) but Batis 40 wins the day for the Batis lineup IMHO. Also, I know others have mentioned that the Batis OOF is busy or that the transition is harsh - I must have received a nice copy or have low standards. I'm loving so much about this little guy.