APS-C lens on Lumix S5 - help

[siemecs]

Hi,

I recently purchased a TTArtisan 40mm f / 2.8 Macro L-mount lens for my Lumix S5.
The lens was cheap, so I did not make a proper diagnosis.
It quickly turned out that this lens, despite the L-mount mount, is designed for APS-C sensors.
When trying to take a picture, I have a large circle in the viewfinder and black corners - you know - vignetting.

From the "fun" so far, the lens seems useless on the S5. I don't know why who needs an L-mount lens not for full frame.

I have a request for advice, is the APS-C lens on the LUMIX S5 likely to be useful, maybe it's a matter of some settings in the body, etc.?

 

[Jeffry7]

Hi,

I recently purchased a TTArtisan 40mm f / 2.8 Macro L-mount lens for my Lumix S5.
The lens was cheap, so I did not make a proper diagnosis.
It quickly turned out that this lens, despite the L-mount mount, is designed for APS-C sensors.
When trying to take a picture, I have a large circle in the viewfinder and black corners - you know - vignetting.

From the "fun" so far, the lens seems useless on the S5. I don't know why who needs an L-mount lens not for full frame.

I have a request for advice, is the APS-C lens on the LUMIX S5 likely to be useful, maybe it's a matter of some settings in the body, etc.?

 

[mcantsin]

There haven been a number of APS-C L-Mount cameras by Leica, the TL, TL2 and CL. The TL was evn the first L-Mount camera ever built.

As said, you can use this lens in crop mode. It just means that your resolution will drop to 10 MP and that images will be a bit noisier. For a macro lens, the TTArtisan 40mm is still a very good deal.

 

[siemecs]

Ok thanks, but should I set the crop mode somehow or does it happen automatically?

 

[Michael_too]

With some lenses it will happen automatically as the body and lens will exchange the information about its image circle electronically, with others you will have to dive into the menu and set the camera to apsc mode yourself.

I have it assigned to my quick menu to get there a little faster. Can also be useful for video to extend the range of my lens by a factor of 1.5.

 

[JDLaing50]

Ok thanks, but should I set the crop mode somehow or does it happen automatically?

If you use one of Leica’s APS-C lenses that communicates with the camera it automatically sets the camera to APS-C mode. I dint think you can set the camera to APS-C mode in the menus, other than in video, when using a manual third party lens.

 

[Off The Mark]

As mentioned above, while you can set the crop mode in Video shooting, I haven't found a way to set it manually in Stills mode.

Also as mentioned above, aps-c lenses with electronic contacts will tell the S5 to switch to crop mode in stills automatically. However, since your lens is a fully manual "dumb" lens (meaning no electrical contacts to communicate with your S5), there isn't a way to set crop mode in stills.

The S5 either needs the lens to "tell" it via electrical contacts to switch to crop mode in stills, or it can't be switched to crop mode in stills.

Maybe Panasonic will come out with a firmware update??? However, I am not sure Panasonic is really interested in making their cameras more compatible with the likes of lenses that aren't "officially" part of the L-Mount Alliance.

On a side note: I have a Canon EF-S 10-18 STM lens (which is aps-c format) and use it with the Sigma MC-21 adapter, and it will automatically shift to crop mode. On the other hand, a lens like the Tamron 10-24 (which is also an aps-c lens) won't automatically switch to crop mode.

Hope this helps.

 

[John Vickers]

Seems like you have a very inexpensive lens that can take quite nice pictures.

Also, the full-frame sensor on your camera can get a lot more image out of the lens than an APS-C camera could.

Hi,

I recently purchased a TTArtisan 40mm f / 2.8 Macro L-mount lens for my Lumix S5.
The lens was cheap, so I did not make a proper diagnosis.
It quickly turned out that this lens, despite the L-mount mount, is designed for APS-C sensors.
When trying to take a picture, I have a large circle in the viewfinder and black corners - you know - vignetting.

From the "fun" so far, the lens seems useless on the S5. I don't know why who needs an L-mount lens not for full frame.

I have a request for advice, is the APS-C lens on the LUMIX S5 likely to be useful, maybe it's a matter of some settings in the body, etc.?

Short answer - Try this:

• For stills, set [aspect ratio] to [1:1].
• For video, set [image area of video] to [APS-C.].

See how that works for you. That will give you 4000x4000 JPEGs, and 6k x 4k RAW files, which will definitely need cropping.

For still photographs, do you shoot just JPEG, just RAW, mostly JPEG... ?

What does the vignetting look like in the viewfinder, or on the rear display in P/A/S/M modes, as you change the focus distance / magnification, and change the aperture ?

That square, 1:1, aspect ratio means you're looking at a 24x24mm crop of the 36x24mm sensor. The lens is designed for a 24x16mm sensor, and the lens doesn't have any rectangular baffles, so we can expect a round image circle with little vignetting, at least for the middle 2/3rds of each side of the square image.

That lens doesn't seem to have big problems with vignetting on APS-C bodies, so I'd guess you will do a bit better than that, particularly with the lens stopped down. Some APS-C lenses can cover an FF image circle at some settings, but from what you've said, this is not one of them. In the extreme corners of the square crop, I'd expect something between noticeable vignetting and just black.

The corners of a 24x24mm image are about 17% further from the centre than the corners of a 24x16mm image.

The corners of a 36x24mm image are 50% further from the centre than the corners of a 24x16mm image.

You can crop the images to your liking.

If you only occasionally shoot macro, it seems like a it seems like a quite decent lens that needs a bit of cropping when used on on an FF body.

 

[Michael_too]

I forgot about the difference between stills and video in this respect. For stills you could set the output resolution to 12MP and than activate ex-tele conv. to digitally crop into the frame while shooting. Your raw will still contain the image from the entire sensor area, but the jpg and the evf and lcd will show you a crop, slightly wider than apsc. It is a bit of a clutch. You will still have to crop your raws while processing, but maybe it gets a little easier to compose the shot or focus as everything gets shown a little bigger while shooting. It's indeed a bit silly we can't just tell the camera what lens is on it when there is no electronic communication.

 

[Strangefinder]

“Extended Teleconverter” for APS-C lenses or tighter EVF/JPEG framing


Wim Arys covers the menu system for the Lumix S1 and Lumix S1R:

https://www.wimarys.com/panasonic-lumix-s1-settings-tips-and-tricks/

This Markene Hielema video covers the function for the Lumix G9. In the Comments, the Lumix S5 is reported to have the Ex Tele Conv. option (though, not the Digital Zoom option)

RAW images remain uncropped.









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[John Vickers]

I forgot about the difference between stills and video in this respect. For stills you could set the output resolution to 12MP and than activate ex-tele conv. to digitally crop into the frame while shooting.

Your raw will still contain the image from the entire sensor area,

Yes.

I tried [Ex. Tele Conv.] before I posted, but I was suffering from brain fade or finger trouble, and it seemed - to me - only to work with RAW disabled.

But you are quite right. And setting [Picture Size] to [M], and setting [Ex. Tele Conv.] to [TELE CONV.] gives a 1.4x crop, as you say, slightly wider than APS-C.

but the jpg and the evf and lcd will show you a crop, slightly wider than apsc. It is a bit of a clutch. You will still have to crop your raws while processing, but maybe it gets a little easier to compose the shot or focus as everything gets shown a little bigger while shooting. It's indeed a bit silly we can't just tell the camera what lens is on it when there is no electronic communication.

It would be nice if we could tell the camera that we have an image circle - not rectangle - of some diameter, and have it produce JPEGs, or video, or whatever aspect ratio based on that.

We might have a lot of data that we would like to tell the camera, and have the camera remember, about whatever non-electronic lens we are using - distortion parameters, chromatic aberation, ...

 

[Tom Caldwell]

There haven been a number of APS-C L-Mount cameras by Leica, the TL, TL2 and CL. The TL was evn the first L-Mount camera ever built.

As said, you can use this lens in crop mode. It just means that your resolution will drop to 10 MP and that images will be a bit noisier. For a macro lens, the TTArtisan 40mm is still a very good deal.

Sigma DC lenses (aps-c) in EF mount work in auto-crop mode without user intervention - in fact I am not sure if you can choose to use them with their natural image circle.

My in-use camera is the 20mp S1.

I have not noticed any sign that the resulting images are noisier. Might be my eyesight. They look quite natural, but the smaller size of their files is the only real sign that these lenses are having their images cropped back to 10mp and aps-c effective field of view.

I bought them initially to be used used adapted with focal reduction on M4/3 bodies where their full image circle can be placed on the 4/3 sensor well before Panasonic had any obvious interest in L-Mount. That I can now also adapt them for use on L-Mount as well is simply a bonus.

It does pose a conundrum that the exact same aps-c image circle can be placed on 20mp of a 4/3 sensor and 10mp of the FF L-Mount sensor. Direct mounting without focal reduction crops the lens image circle and effectively doubles the focal length when compared to the FF sensor fov. On the S1 they give a cropped sensor and aps-c 1.5x comparative fov.

Just an interesting observatIon as I have not compared the caught images directly but only noticed that the respective images from both systems are quite acceptable.

Perhaps a useful side benefit of using EF mount lenses?

 

[Off The Mark]

I have not noticed any sign that the resulting images are noisier. Might be my eyesight. They look quite natural, but the smaller size of their files is the only real sign that these lenses are having their images cropped back to 10mp and aps-c effective field of view.

Don't tell anyone, but I often use the Canon 10-18 EF-S (instead of my Canon EF 16-35 f/4 L) for a lot of my real estate work and, as you noted, the real major difference is the reduced file size. The 10-18 does have a bit more veiling flare and the ghosting is a bit worse when shooting directly toward the sun but that is about it. And to be honest, the flare and ghosting aren't THAT bad. Just that the EF 16-35 f/4 L is REALLY good at controlling flare and ghosting.

The thing about shooting real estate for a living is that you end up taking THOUSANDS of photos a week. It's a constant battle to clean up disk space.

 

[siemecs]

Thanks a lot. I have implemented your advice.
[Picture Size] to [M] and [Ex. Tele Conv.] Then [TELE CONV.] have done their job.
Beautiful photos and a great lens!
Greetings

 

[Greg Ohio]

From the "fun" so far, the lens seems useless on the S5. I don't know why who needs an L-mount lens not for full frame.

There's actually a scenario where an APS-C lens can be quite useful on an S5: 4K60 video. 4K60 requires an APS-C crop, and several of the most suitable lenses for that are Sigma APS-C like the 16/1.4, 30/1.4, and 18-50/2.8.