Thoughts on an FE 100-400mm F4.5–5.6 GM OSS with a Sony a7r IV

Started 8 months ago | Discussions thread
AZheaven Senior Member • Posts: 1,685
Re: Thoughts on an FE 100-400mm F4.5–5.6 GM OSS with a Sony a7r IV

PWPhotography wrote:

I have already owned 100-400 GM well before the release of Sigma lens. But even from scratch, I likely will still get Sony lens - 1) So far I still trust and only bought OEM long lenses, Canon or Sony, never ever own any Sigma or Tamron long lenses; 2) in this case, Sony can use TCs while Sigma has no option, or even later Sigma released TC, may still inferior as we see in EF/F mounts; 3) 1/3-stop faster and would be 2/3 stop faster with 1.4x TC provided Sigma ever released 1.4x TC. Sure Sigma is cheaper and lighter that are not really an issue to me.

I have yet to see any shots with the new Sigma of BIF's. And I'm on Fred Miranda, and the Sony Alpha Wildlife Shooters Facebook page. A majority of photos are with the 100-400 or 200-600. Sure, the stills with the Sigma look great. But performance with BIF's is missing. And it's that f6.3 at the long end of the Sigma that I'm not crazy about.

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