35mm 1.8 OSS Test

Started Jan 18, 2013 | Discussions thread
blue_skies
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Re: New theory ... ?
In reply to blue_skies, Jan 19, 2013

blue_skies wrote:

I took 4 quick handheld shots, similar to Lee's setup, after I got home tonight.

Below is what I got. It can probably be improved upon further, but my results seems to confirm Lee's? But to a lesser degree?

I used LR to crop and convert to JPGs, using autoTone (hence variations in color rendering).





35mm @ f/1.8



35mm at f/2.8



50mm at f/1.8



50mm at f/2.8

I was playing with some other fast 35mm lenses (MF) and noticed two factors: minimum focus distance and angle of focus plane. Both factors can have an effect on the CA and the softening factor.

I took 4 more shots for comparison sake. First two are further away, and last two are closer in. To my surprise, the effect seems affected by distance? Or, to say this different - a minimum black outline has to be present for the lens to render properly, likely due to CA?

Maybe this test does NOT affect what we would see with a typical subject?



35mm at f/1.8 - further away

35mm at f/2.8 - further away



35mm at f/1.8 - closer in

35mm at f/2.8 - closer in

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Cheers,
Henry

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