Upgrading from Sony A6400 to Sony A7 IV, 3 questions

[David Fraser]

Hi,

 

I am thinking of upgrading from my Sony A6400 to a full frame Sony A7 IV.

I am into taking photos of birds and I believe the eye detection and general auto focus would be better on the A7 IV for birds correct, compared to my A6400?

Would the A7 IV be better in low light than the A6400?

3rd question i use the Sigma 150-600mm DG DN Sports lens with my A6400. Will this lens work with the full frame A7 IV??

 

thanks for the help

 

David 

[ohaya]

Hi,

It is a full-frame lens.  I've got one and have used it with my A7iv.

Jim

[Thwyllo]

On 9/15/2023 at 1:52 AM, ohaya said:

Hi,

It is a full-frame lens.  I've got one and have used it with my A7iv.

Jim

And even if it wasn't, it's possibly worth the OP knowing that the a7 series auto detects when you fit an APSC  lens and changes mode accordingly. A complete contrast to my Nikon full frame which requires fanning about in a sub menu to manually change the setting.

 

For me it means I can still use some of the great E (as opposed to FE) lenses I acquired for my trusty old a5100.

[FunWithCameras]

If you want an alternative to the A7IV, the A6700 has the latest AF package and processor - it is more advanced than the A7IV, and still the size of your A6400. I think it may even offer a slightly faster frame rate than the A7IV.