Oly 75mm Lens - Some Disappointment

Started Sep 20, 2012 | Discussions thread
kenw Veteran Member • Posts: 5,339
Re: Oly 75mm Lens - Some Disappointment

Israel119 wrote:

Anyone else's experience comparing IQ of the 100-300 at 75mm with the 75mm?

How do you shoot a 100-300 at 75?

In general once stopped down primes and zooms perform very similarly. The greatest area of difference will be the edges or corners. However, you won't be able to see that difference unless you correct for CA (fringing as you called it). Uncorrected CA also reduces resolution and CA is more extreme in the corners and edges. So if you want to compare edge/corner resolution you need to correct for CA first.

So I'd recommend applying CA correction to both lenses and then look in the corners.
Ken W
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