35mm and APS-C Sensor Format

[hirohhhh]

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I was digging through the settings of my SL and I changed Sensor Format setting, from default 35mm to APS-C which I never did before. I can't figure out what is this for? To me it looks like just a crop of the whole image? Can someone please explain what it is for and how it could be useful. Thanks.

[digitalfx]

If you put an APS-C lens on the camera you need to shoot in this mode. For example the TL lenses

[hirohhhh]

7 minutes ago, digitalfx said:

If you put an APS-C lens on the camera you need to shoot in this mode. For example the TL lenses

Oh, I see. I have only SL lenses, so this setting basically doesn't mean anything in my case. Thanks, now it's clear.

Edited December 31, 2019 by hirohhhh

[ajmarton1]

I use it to zoom in more when you need that extra bit. Crop makes little impact on the image because of all the pixels in the file. 

[jaapv]

That does not make a difference to cropping in the computer, but might help framing in the EVF.

[digitalfx]

5 hours ago, ajmarton1 said:

I use it to zoom in more when you need that extra bit. Crop makes little impact on the image because of all the pixels in the file. 

You are much better off doing this in post. If you do it in camera, you cant get them back

[Exodies]

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Isn’t the DNG full frame anyway with this setting?

[01af]

vor 9 Stunden schrieb hirohhhh:

To me it looks like just a crop of the whole image?

That's exactly what it is.

[tom0511]

vor 3 Stunden schrieb Artin:

I think it is only useful for apsc lenses , or perhaps if anyone adapting 16mm cine lenses ?

leica apsc lenses automaticlly switch to dx-crop.

I would think it can help framing when you need longer reach and want to crop.

[Joakim]

39 minutes ago, Exodies said:

Isn’t the DNG full frame anyway with this setting?

No, the raw file is cropped to the smaller format. Since the image circle of ASP-C lenses doesn't cover the whole sensor you would get some very ugly vignetting if it was full frame. 

Question to SL2 users, when choosing to shoot in another aspect ratio like 4:3 the whole full 3:2 is saved but is the selected ratio somehow stored in the DNG so one will see the image in 4:3 format once the image has been downloaded to the computer? What ratio is the embedded jpeg file?

Edited December 31, 2019 by Joakim

[Aktenschrank]

11 hours ago, hirohhhh said:

I was digging through the settings of my SL and I changed Sensor Format setting, from default 35mm to APS-C which I never did before. I can't figure out what is this for? To me it looks like just a crop of the whole image? Can someone please explain what it is for and how it could be useful. Thanks.

It's both for using aps-c lenses that don't cover the full image circle as well as a digital crop in camera that allows for some extra "reach", that you're able to already see in the field while shooting rather than waiting for post production to crop the image. I'm personally using this all the time, albeit the SL2 is really not made for it with regards to the fact that you can NOT assign either sensor format or aspect ration to a Fn-button or the Favourites Menu

[Aktenschrank]

53 minutes ago, Joakim said:

No, the raw file is cropped to the smaller format. Since the image circle of ASP-C lenses doesn't cover the whole sensor you would get some very ugly vignetting if it was full frame. 

Question to SL2 users, when choosing to shoot in another aspect ratio like 4:3 the whole full 3:2 is saved but is the selected ratio somehow stored in the DNG so one will see the image in 4:3 format once the image has been downloaded to the computer? What ratio is the embedded jpeg file?

The raw dng is the full sensor readout, but carries the chosen crop in the metadata, so Lightroom can read it. So you will have a file in Lightroom that is exactly as you saw it in the EVF (cropped). Once you select the crop tool in LR you can change the crop or go back to the full frame for example.

[SrMi]

This how it works on SL2 (confirmed with tests), I assume it works the same with SL:

- Sensor format option 35mm vs APS-C is only available with full-frame lenses.

- When selecting APS-C mode with full-frame lenses, full size DNG is saved with added cropping instructions. This means that one can change the crop in post. Embedded JPG is uncropped.

- The same is true for Photo Aspect Ratio.