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Mosaic Comparison Notes

Shooting notes for 24/28/35/50/70/85/120 comparisons

Focus was on the two pink flowers near center. The Nikon D3x with mirror lockup and a remote release was used at ISO 100, in 14-bit lossless NEF. Light was steady with no variance.

Images for sharpness comparisons converted to 16-bit TIF using Adobe Camera RAW with sharpening set to extract maximum details using sharpening parameters for deconvolution (see Making Sharp Images). Noise reduction off, lens corrections off.

Avanced sharpening makes an inferior lens look better than it is; although sharpening is applied equally to all images, the worst quality lens benefits the most in a perceptual way.

The variance in overall lens brightness, as well as vignetting and distortion made perfect matches in framing impossible. I used the as-marked focal lengths on each lens. Although the scene appears slightly tilted (corrected for the distortion comparisons), this is the best that can be done with either a bubble level or visually or with the D3x virtual horizon feature; all within 0.5° of level, and none more accurate than that.

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Since 2006, Diglloyd Advanced Photography is the authoritative review and reference for DSLRs and their lenses: Canon and Nikon primarily, but also Pentax and some medium format. Reviews of key DSLRs are included, but the primary focus is on lens performance. Also included is a wealth of technique and workflow approaches.

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The test scene (Nikon 24-120 @ 24mm)
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