SUMMARY

Christopher Frost provides a comprehensive review of the Sony FE 100-400mm f/4.5 G Master lens, a professional telephoto zoom priced at approximately $4,300. The lens features a constant f/4.5 aperture, which is advantageous for low light and subject isolation compared to variable aperture zooms. It boasts nearly instantaneous autofocus driven by four XD linear motors, significantly faster tracking than its predecessor, and internal zooming for dust and moisture resistance. Optical testing on the Sony a7CR reveals strong sharpness and excellent bokeh, though longitudinal chromatic aberration at f/4.5 is identified as a weakness.

TAKEAWAYS

The Sony FE 100-400mm f/4.5 G Master lens costs around $4,300.

It offers a constant f/4.5 aperture, superior autofocus speed, and internal zooming.

The lens delivers strong sharpness and exceptional bokeh, with minor corner softness at 400mm.

Longitudinal chromatic aberration at f/4.5 is noted as the primary optical drawback.

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