Any reasons to use APS-C lenses on a full-frame Panny body?

[SocialKonstruct]

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Just curious for those who use APS-C (Leica ones) on a full-frame body. Why if the 24 mp goes down to a 10 mp (on a Panny S1 which I own)? I assume perhaps the Leica quality is worth the 10 mp (or higher if using the S1R)...?

[tom.w.bn]

The Leica APS-C lenses are good but not special in any way. The only reason I can think of is saving money not buying a particular lens for full frame. 

[maron]

Small, light, cheap...

[Marac]

I have the S1R and on this camera the images are as good as my CL with the APS-C lenses on it, they are more compact and lighter and offer AF, on an S1 I think the 10MP (same as the M8) would bother me so I'd maybe go with M lenses if you don't mind MF.

I cannot bring myself to sell the CL though, it's way too handy and beautiful 

[BernardC]

4 hours ago, tom.w.bn said:

The only reason I can think of is saving money not buying a particular lens for full frame.

Leica's APS-C lenses are more expensive than Sigma's full-frame lenses. I don't think anybody is buying them to save money.

Two reasons come to mind:

• Size, some of the TL lenses are quite compact. You still get 20 MP files out of them with the SL2, which is more than enough.
• Video, where the Super-35-sized APS-C sensor has significant advantages over "full frame."

[tom.w.bn]

vor 13 Minuten schrieb BernardC:

Leica's APS-C lenses are more expensive than Sigma's full-frame lenses. I don't think anybody is buying them to save money.

Probably I wasn't precise enough. I meant that some people probably already have a Leica APS-C system and lenses and they continue to use these lenses on the full frame body instead of buying new lenses.

I personally don't think it makes sense to use APS-C lenses on a full frame body.

[Jared]

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I use a couple of Leica TL lenses on my SL2.  The first reason is limited availability of SL (full frame) Leica lenses for the SL2.  For example, I want a 50mm Summicron SL and can’t find one, so I tend to use the 35mm SummiluxTL in crop mode. The second reason is features.  If I want a macro lens for the SL or SL2, my only option without adapting a lens from another format is the 60mm TL.  OK, technically there is the Panasonic 24-105 as well, but it only gets to 0.5x magnification, not 1:1.  The third reason is size/weight.  The vast majority of my image taking situations do not require more than 20 MP resolution, so it can be nice to carry a smaller, lighter lens or set of lenses.  For street photography, 20 megapixels is ample, and I’d rather have a smaller, lighter lens than a bulky zoom.  Basically, the 35mm Summilux TL on the Leica SL-2 gives me the same result as a 50mm Summicron SL would on the 24 megapixel Leica SL.  

In the past, I occasionally used the TL lenses on the 24 megapixel SL camera but not all that often since dropping all the way to 10 megapixels was not great, and I could generally get a better result using the CL instead.  But with the 20 plus megapixel crop on the SL2?  And the added benefit of IBIS?  There are definitely times I am happy to use the cropped lenses on the new camera.  

[jaapv]

7 hours ago, tom.w.bn said:

Probably I wasn't precise enough. I meant that some people probably already have a Leica APS-C system and lenses and they continue to use these lenses on the full frame body instead of buying new lenses.

I personally don't think it makes sense to use APS-C lenses on a full frame body.

If it doesn't make sense why does Leica give you the option?

[Boojay]

1 hour ago, Jared said:

  If I want a macro lens for the SL or SL2, my only option without adapting a lens from another format is the 60mm TL.  OK, technically there is the Panasonic 24-105 as well, but it only gets to 0.5x magnification, not 1:1.   

Not so.... there is the Sigma 70mm DG Macro Art Lens - L mount - full frame.  

 

Edited March 14, 2020 by Boojay

[SocialKonstruct]

5 hours ago, Jared said:

I use a couple of Leica TL lenses on my SL2.  The first reason is limited availability of SL (full frame) Leica lenses for the SL2.  For example, I want a 50mm Summicron SL and can’t find one, so I tend to use the 35mm SummiluxTL in crop mode. The second reason is features.  If I want a macro lens for the SL or SL2, my only option without adapting a lens from another format is the 60mm TL.  OK, technically there is the Panasonic 24-105 as well, but it only gets to 0.5x magnification, not 1:1.  The third reason is size/weight.  The vast majority of my image taking situations do not require more than 20 MP resolution, so it can be nice to carry a smaller, lighter lens or set of lenses.  For street photography, 20 megapixels is ample, and I’d rather have a smaller, lighter lens than a bulky zoom.  Basically, the 35mm Summilux TL on the Leica SL-2 gives me the same result as a 50mm Summicron SL would on the 24 megapixel Leica SL.  

In the past, I occasionally used the TL lenses on the 24 megapixel SL camera but not all that often since dropping all the way to 10 megapixels was not great, and I could generally get a better result using the CL instead.  But with the 20 plus megapixel crop on the SL2?  And the added benefit of IBIS?  There are definitely times I am happy to use the cropped lenses on the new camera.  

Looking at some TL lenses to mount onto my Panny S1 soon. Plus some cost savings. I also don't own any CL or APS-C L mount bodies and for me as an art student 10 megs for photos isn't bad for the type of artwork I do. I just won't do art documentation of my sculpture using APS-C lenses

[david strachan]

I'd like to see an image taken with an APS-C lens on a full frame sensor without any cropping.  Just want to see the circle of image and the vignetting which happens.

Can someone do it for us interested people...😙.  Thanks.

[tom.w.bn]

vor 14 Stunden schrieb jaapv:

If it doesn't make sense why does Leica give you the option?

For Leica it makes a lot of sense because there are people out there who don't look left and right for lenses, they buy the red dot only. When you stay within the Leica brand proposition, APS-C lenses can be seen as a "budget choice". 

[jaapv]

Yes, there you are.   I agree, though, that if size is he motivating factor they are even better used on a CL.

[Jared]

13 hours ago, Boojay said:

Not so.... there is the Sigma 70mm DG Macro Art Lens - L mount - full frame.  

 

Missed that one, thanks!

[Jared]

31 minutes ago, jaapv said:

Yes, there you are.   I agree, though, that if size is he motivating factor they are even better used on a CL.

Yes, unless:

1) You own an SL or SL2 but don’t own a CL

2) You want or need IBIS for a particular situation

[michali]

On 3/15/2020 at 4:49 AM, david strachan said:

I'd like to see an image taken with an APS-C lens on a full frame sensor without any cropping.  Just want to see the circle of image and the vignetting which happens.

Can someone do it for us interested people...😙.  Thanks.

Here'a an uncropped image, no PP except for DNG conversion to Jpg.   SL2 & Leica 60mm APO Macro TL  ISO200 f2.8 @ 1/400s

Click on image to get proper res.

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

Edited March 18, 2020 by michali

[david strachan]

Thank you Michali.

I'm totally suprised to see no image circle vignetting considering it is an APSC lens on a full format sensor.  In fact the image looks good right to the edges. 

 

All best...

Edited March 18, 2020 by david strachan

[Viv]

18 minutes ago, david strachan said:

Thank you Michali.

I'm totally suprised to see no image circle vignetting considering it is an APSC lens on a full format sensor.  In fact the image looks good right to the edges. 

 

All best...

I also find this very surprising - even inexplicable.

Who can explain?

[Boojay]

1 hour ago, Viv said:

I also find this very surprising - even inexplicable.

Who can explain?

 

My understanding is that when using an APSC L mount lens on the SL2, the camera automatically crops the image - there is not a way to see a full frame image.  Yes, if you chose to shoot in APSC mode with a full frame lens, the camera will show you the cropped image but the full frame will be saved.  I think Michali's image is a cropped image.

 

 

 

Edited March 18, 2020 by Boojay
spelling

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Hallo,

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[david strachan]

Thank you Boojay.

Your explanation seems the only possibility.

I was hoping for a real "uncomputed" image.

...

Edited March 18, 2020 by david strachan