APS-C lenses on A9 7Riii

[gorillamotors]

I have had my Sony a6500 for about 1.5 years now and love it. I am thinking on a new A9 or 7Riii. What are the ramifications of using these APS-C lenses on the full frame cameras?

 

Jim

[Keith Forman]

You can't use those lenses in full-frame mode.

[dbmiller]

6 hours ago, Keith Forman said:

You can't use those lenses in full-frame mode.

Wrong. You can use them in full frame mode, but they are likely to vignette.

By default the camera will automatically turn on crop mode with an APS-C lens, but you can switch the camera from auto crop to manual, then turn off crop mode.

Main menu item: APS-C/Super 35mm (On A7Riii, page one of fourteen in the Quality/Image Size1 tab)

First sub-menu item: APS-C S35 Shooting - Switch from Auto to Manual

Second sub-menu item: APS-C S35: Shoot. - Turn APS-C off to shoot FF with an APS-C lens

[Keith Forman]

They do not vignette. They cut off about 20% of the image hitting the sensor in full frame mode.

[dbmiller]

On 7/5/2018 at 4:25 PM, Keith Forman said:

They do not vignette. They cut off about 20% of the image hitting the sensor in full frame mode.

When you shoot them in APS-C mode, yes. But as I noted above, you can actually turn on full frame mode and depending on the lens, they may or may not vignette depending on how much of an image circle the lens actually projects.

For example, the following picture was taken with the SEL1018 APS-C lens @13mm on my FF A7Riii in FF mode.

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[Keith Forman]

You might be able to compensate for that with Lightroom

[dbmiller]

5 minutes ago, Keith Forman said:

You might be able to compensate for that with Lightroom

Certainly. Just showing that FF is indeed possible with some APS-C lenses / Focal lengths