Sony 70 400 vs sigma 150 500

Started Dec 4, 2012 | Questions thread
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Kokeen4231
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Sony 70 400 vs sigma 150 500
Dec 4, 2012

The main purpose would be for birding. At the longest end, the Sigma I know tends to go soft. How is the Sony at it? Thanks in advance.

 Kokeen4231's gear list:Kokeen4231's gear list
Fujifilm X-E2 Fujifilm XF 35mm F1.4 R Fujifilm XF 18-55mm F2.8-4 R LM OIS Fujifilm XF 55-200mm F3.5-4.8 R LM OIS
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