UWA for A7(R) ?

[syke]

Although there may not be too many fans of the CV15 uwa lens being used on the 7/7R, this link for a LR preset might be helpful to those who are using it.

http://www.dpreview.com/forums/post/52919116

A quick test shot from my flat's window earlier (except for a little perspective correction, the rest are unedited):

After applying the LR preset:

Though not perfect, the preset as is works well enough for a simple hobbyist like me. A few more adjustments should make it even better. Looking forward to the author's next improved version, if any.

I prefer CV12, there seems to be less magenta cast compared to CV15. Sony will release a 16-35 soon, so a CV12 would make a better choice for those who don't have a UWA lens.

BTW, even with the profile there seems to be still some magenta cast on the right side. But I guess it's better than leaving it untouched...

 

[pinholecam]

CV12 works well despite my initial reservations.
So small and its 12mm.
Sharp to the edge with some corner drop off, but I don't think there is a UWA that does not have it at 12mm.
Not too many 12mm in the first place and certainly not this small.

No magenta cast on the m-mount version (nothing obvious to be at the least)
Just need a vignette correction in LR.


DSC0474320140223ILCE-7-1-1 by jenkwang, on Flickr


DSC0476620140223ILCE-7-1 by jenkwang, on Flickr

 

[syke]

CV12 works well despite my initial reservations. So small and its 12mm. Sharp to the edge with some corner drop off, but I don't think there is a UWA that does not have it at 12mm. Not too many 12mm in the first place and certainly not this small. No magenta cast on the m-mount version (nothing obvious to be at the least) Just need a vignette correction in LR. http://www.flickr.com/photos/29329237@N07/12746581065/ DSC0474320140223ILCE-7-1-1 by jenkwang, on Flickr http://www.flickr.com/photos/29329237@N07/12719481644/ DSC0476620140223ILCE-7-1 by jenkwang, on Flickr

Nice... At this focal length, it is expected to have distortion and soft smearing edges..

Some will ask why is this a rectilinear lens and not a fisheye lens...

 

[Kit]

CV12 works well despite my initial reservations.
So small and its 12mm.
Sharp to the edge with some corner drop off, but I don't think there is a UWA that does not have it at 12mm.
Not too many 12mm in the first place and certainly not this small.

No magenta cast on the m-mount version (nothing obvious to be at the least)
Just need a vignette correction in LR.


DSC0474320140223ILCE-7-1-1 by jenkwang, on Flickr


DSC0476620140223ILCE-7-1 by jenkwang, on Flickr

Strange. I remember reading that the 12mm has very strong colour shift at the edges.

 

[pinholecam]

Strange. I remember reading that the 12mm has very strong colour shift at the edges.

Yar.. thats one of the initial reservations for me buying this lens too.
So I was pleasantly surprised that I did not get a color cast.
I don't know if the m-mount and ltm mount versions make a difference.
Other factors probably being adapter and A7 or A7r.

 

[hjbyeo]

Strange. I remember reading that the 12mm has very strong colour shift at the edges.

Hi, Kit.

Indeed, the 12's got heavy vignetting and possibly colour shifts at the edges.

But with the right tools, the DNG Flat Field plugin, and the right profiling, the images can be corrected as seen from Pinholecam's images. The Sony Lens compensation is another that can help, but I always felt limited by its capabilities ... such as not being able to use Bulb mode.

My shots using the A7 with the Voigtlander 12mm LTM lens for your reference.

Some of the later shots were using the DNG Flat Field Plugin, and the earlier shots with the Sony Lens Compensation app. I prefer the results from the DNG Flat Field Plugin.

 

[albertri]

Yar.. thats one of the initial reservations for me buying this lens too.
So I was pleasantly surprised that I did not get a color cast.
I don't know if the m-mount and ltm mount versions make a difference.
Other factors probably being adapter and A7 or A7r.

Hi, Kit.

Indeed, the 12's got heavy vignetting and possibly colour shifts at the edges.

But with the right tools, the DNG Flat Field plugin, and the right profiling, the images can be corrected as seen from Pinholecam's images. The Sony Lens compensation is another that can help, but I always felt limited by its capabilities ... such as not being able to use Bulb mode.

My shots using the A7 with the Voigtlander 12mm LTM lens for your reference.

Some of the later shots were using the DNG Flat Field Plugin, and the earlier shots with the Sony Lens Compensation app. I prefer the results from the DNG Flat Field Plugin.

I know bro Pinhole using A7 how about you bro hjbyeo you sing A7 or A7r I have been wanting to have widest lens I could get not going to FE. But read a lot of report the color shift or magenta cast on A7r using RF wide lenses.

 

[ricleo]

I know bro Pinhole using A7 how about you bro hjbyeo you sing A7 or A7r I have been wanting to have widest lens I could get not going to FE. But read a lot of report the color shift or magenta cast on A7r using RF wide lenses.

bro hjbyeo uses an A7. ha we shld really meet up one of these days to try that wicked 12mm on my a7r. see how bad/correctable the color shift is on the r

 

[albertri]

bro hjbyeo uses an A7. ha we shld really meet up one of these days to try that wicked 12mm on my a7r. see how bad/correctable the color shift is on the r

yeah I need to try our this lens in a real environment (outside) doing some landscaping hehe

 

[hjbyeo]

bro hjbyeo uses an A7. ha we shld really meet up one of these days to try that wicked 12mm on my a7r. see how bad/correctable the color shift is on the r

yeah I need to try our this lens in a real environment (outside) doing some landscaping hehe

We should come together for some landscapes. Maybe this weekend? Making it central to make it easier for all of us? You can take a good look at my 12mm with A7, and the results. And I can explain a little bit on the DNG Flat Field plugin ...

And of course, being a prime, so it's possibly another inconvenience for those who are used to the convenience of a zoom. And it's really really wide. And you can see in the pictures sometimes it's way too wide to get a really good composition. But when the location's tight, you'll be so happy that it's able to take it all in!

At the end of the day, with the A7 and 12mm, it's a bit of work, and quite possibly you'll have to make do with what you see on the camera LCD until you fix it in LR.

Not sure if this would be an inconvenience to you.

 

[ricleo]

We should come together for some landscapes. Maybe this weekend? Making it central to make it easier for all of us? You can take a good look at my 12mm with A7, and the results. And I can explain a little bit on the DNG Flat Field plugin ...

And of course, being a prime, so it's possibly another inconvenience for those who are used to the convenience of a zoom. And it's really really wide. And you can see in the pictures sometimes it's way too wide to get a really good composition. But when the location's tight, you'll be so happy that it's able to take it all in!

At the end of the day, with the A7 and 12mm, it's a bit of work, and quite possibly you'll have to make do with what you see on the camera LCD until you fix it in LR.

Not sure if this would be an inconvenience to you.

do you happen to work near raffles place? i know albert is ard there, we cld meet friday evening after office hrs for some cityshoot n try out the lenses. plus the IT fair is at mbs too if interested. I can bring my samyang 14mm and sel 10-18 too

anyway let's discuss over whatsapp haha

 

[ricleo]

just took 2 shots today, SEL 10-18 at 14mm after lens profile correction vs samyang 14mm after lens profile correction. both at F8.

both shots taken within minutes of each other. Samyang renders the scene more warmly while the sony lens is more blue. not that the sony produces a little magenta corners as well which i didnt attempt to correct at F8. only vignetting corrected.

Samyang is wider at 14mm after correction and sharp edge to edge at F8. Sony is sharp abt 2/3 of the frame.

to me both are decent enough for me as UWA options on the A7r after the ACR distortion corrections. sony wins in terms of size and AF while Samyang on overall IQ.

SEL10-18


Samyang 14mm

 

[syke]

We should come together for some landscapes. Maybe this weekend? Making it central to make it easier for all of us? You can take a good look at my 12mm with A7, and the results. And I can explain a little bit on the DNG Flat Field plugin ... And of course, being a prime, so it's possibly another inconvenience for those who are used to the convenience of a zoom. And it's really really wide. And you can see in the pictures sometimes it's way too wide to get a really good composition. But when the location's tight, you'll be so happy that it's able to take it all in! At the end of the day, with the A7 and 12mm, it's a bit of work, and quite possibly you'll have to make do with what you see on the camera LCD until you fix it in LR. Not sure if this would be an inconvenience to you.

Good, you guys take more pictures and post some untouched pictures here...

It would be great to see some samples of the colour cast situation...

 

[ricleo]

if your wanna avoid color cast out of the camera, SLR lenses is the way to go. lenses like 16-35 from sony/canon, samyang 14mm, 17-35 from many manufacturers. size is bigger definitelly.

with more post production with ACR/LR/CS etc, the SEL10-18 is quite nice, although it will nvr be tack sharp edge to edge given that it is for APS-C cameras. CV12 and 15 are workable with A7 with the correct lens correction profiles in LR/ACR.

A7R not so sure, have to really test out to know. haven't seen a good correction profile for the 12mm / 15mm on A7R yet.

Good, you guys take more pictures and post some untouched pictures here...

It would be great to see some samples of the colour cast situation...

 

[baa tanhaa]

just took 2 shots today, SEL 10-18 at 14mm after lens profile correction vs samyang 14mm after lens profile correction. both at F8.

i quite like the IQ of the samyang. looks more pleasant..

 

[longj49]

i quite like the IQ of the samyang. looks more pleasant..

was initially considering the Samyang but in the end the size just killed it for me. instead went for the CV15+Hawk's Helicoid adapter and happy with this tiny combo. plan to get the SEL1018 later for its AF and a little zoom capability.

 

[hjbyeo]

do you happen to work near raffles place? i know albert is ard there, we cld meet friday evening after office hrs for some cityshoot n try out the lenses. plus the IT fair is at mbs too if interested. I can bring my samyang 14mm and sel 10-18 too

anyway let's discuss over whatsapp haha

Ric, let's try to arrange it again on next week? Whatsapp or Telegram works for me.

And seems like the 14mm works for you too. I consider it, but decided against it due to the lack of filter threads.

* * *

Even the Zeiss Biogon may have a bit of concerns on the edges. But it's hell of a sharp lens right in the middle. Anyways, Monochrome always works! Probably a little, very very very very slight smear at the edges.

​

* * *

I'll try out the VC 20 f3.5 coupled with the metabones adapter and see if it works fine. Vignette's present based on cursory observations. But what I really like is the size. It matches the A7 very well.

 

[Kit]

Yar.. thats one of the initial reservations for me buying this lens too.
So I was pleasantly surprised that I did not get a color cast.
I don't know if the m-mount and ltm mount versions make a difference.
Other factors probably being adapter and A7 or A7r.

Hi, Kit.

Indeed, the 12's got heavy vignetting and possibly colour shifts at the edges.

But with the right tools, the DNG Flat Field plugin, and the right profiling, the images can be corrected as seen from Pinholecam's images. The Sony Lens compensation is another that can help, but I always felt limited by its capabilities ... such as not being able to use Bulb mode.

My shots using the A7 with the Voigtlander 12mm LTM lens for your reference.

Some of the later shots were using the DNG Flat Field Plugin, and the earlier shots with the Sony Lens Compensation app. I prefer the results from the DNG Flat Field Plugin.

Thanks folks. So it does require some fixing. In that case, its a no go for me.

 

[syke]

if your wanna avoid color cast out of the camera, SLR lenses is the way to go. lenses like 16-35 from sony/canon, samyang 14mm, 17-35 from many manufacturers. size is bigger definitelly.

with more post production with ACR/LR/CS etc, the SEL10-18 is quite nice, although it will nvr be tack sharp edge to edge given that it is for APS-C cameras. CV12 and 15 are workable with A7 with the correct lens correction profiles in LR/ACR.

A7R not so sure, have to really test out to know. haven't seen a good correction profile for the 12mm / 15mm on A7R yet.

No SLR....

M mount is preferred, and I want to keep the form factor as small as possible.

Sold away all my Canon gear, don't want to go back buying L lenses again...

 

[syke]

Thanks folks. So it does require some fixing. In that case, its a no go for me.

Thats what I thought too...
Difference between the LTM & M mount version?

After seeing all those samples online on the M mount version, it doesn't seem to have much of a problem. Definitely not like the 15mm version...