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Best wide angle lenses for A7iii?
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PostPosted: Sat Jan 19, 2019 8:50 pm    Post subject: Reply with quote
Eriksen wrote:
Nordentro wrote:
I'm happy with the CV 15mm III in Leica M mount, but I would have considered the Laowa 10-18mm if buying something today Wink
https://www.venuslens.net/product/laowa-10-18mm-f-4-5-5-6-fe-zoom/


Do you think this zoom lens will give the same IQ as the 15mm prime lens?


Yes, I think it is just as good with barely noticable differences and it has great sunstars, and very compact for a zoom too. Wink


PostPosted: Sun Jan 20, 2019 2:49 am    Post subject: Reply with quote
What about Minolta 17-35mm 2.8-4? That´s a very inexpensive lens, but does it perform in the same class as the other lenses in this thread?


PostPosted: Sun Jan 20, 2019 3:19 am    Post subject: Reply with quote
Eriksen wrote:
What about Minolta 17-35mm 2.8-4? That´s a very inexpensive lens, but does it perform in the same class as the other lenses in this thread?


No. Particularly this one is one of the weakest zooms in the Minolta AF line. Actually it's a Tamron. Almost all zooms will perform below any of the prime lenses discussed earlier in this thread. Even contemporary and expensive ones have their weak points.


PostPosted: Wed Mar 27, 2019 8:20 pm    Post subject: Reply with quote
Here are two pictures I shot with the Voigtlander Super Wide-Heliar 15mm f/4.5 Aspherical III on my A7III camera. Is this distortion normal? I sat the camera very low near the ground and pointed the lens ca. 20 - 30 degr. upward, so maybe that can be the reason?




PostPosted: Wed Mar 27, 2019 8:54 pm    Post subject: Reply with quote
[quote="Eriksen"]Here are two pictures I shot with the Voigtlander Super Wide-Heliar 15mm f/4.5 Aspherical III on my A7III camera. Is this distortion normal? I sat the camera very low near the ground and pointed the lens ca. 20 - 30 degr. upward, so maybe that can be the reason?

Yes! With such lenses the only way to avoid leaning effects is to point straight ahead and dead level (focal plane and lens axis).


PostPosted: Wed Jan 22, 2020 6:07 pm    Post subject: Reply with quote
tb_a wrote:
..
I've got the 15mm in version 1 and consider it as good enough on my A7R II.
A typical landscape example slightly optimized in Lightroom (lens profile applied); click on picture for best quality viewing:


tb_a wrote:

..
Even my old Ricoh GXR-M 12MP APS-C without AA-filter delivers the better (sharper) pictures compared to the older 24MP Sony FF CMOS sensor with AA-filter (I've got the Sony A850 with the same sensor) in direct comparison and these 2 cameras deliver apprx. the same resolution per sensor square millimeter.


Cut out these two quotes above because of my specific situation and question:

I own the mentioned 15mm Heliar 1st version in LTM, the Ricoh GXR M, Sony NEX5n and A7. My best wide angle performance still is the 15mm on the GXR M. It's decidedly better than the same lens on A7 even in APS-C crop mode. Also better than, in FF mode, the similar angle of view Color Skopar I f4/21mm and an old, wider Tokina RMC f3.5/17mm.

With my lenses, for wide angle performance, would the A7III ( or also A7II ) beat the GXR M?
( Is there another alternative camera that is smaller, even if this means APS-C, that would? )

cheers, Andreas


PostPosted: Wed Jan 22, 2020 11:03 pm    Post subject: Reply with quote
Irix 15mm 2.4 (Blackstone or Firefly) is also worth looking at. I just acquired a Cosina 19-35mm 3.5-4.5. Not perfect but it was cheap.


PostPosted: Thu Jan 23, 2020 1:07 am    Post subject: Reply with quote
kuuan wrote:
With my lenses, for wide angle performance, would the A7III ( or also A7II ) beat the GXR M?
( Is there another alternative camera that is smaller, even if this means APS-C, that would? )

cheers, Andreas


I don't believe that any camera will ever beat the GXR-M in this discipline as no other camera is developed specificly for these wide angle RF lenses developed for film usage.
As I already mentioned in this thread before, the A7R II is a good compromise but ultimate corner sharpness is better on the GXR-M. Most probably the A7 III will perform likewise because of the same new BSI sensor design. The A7 II performs identically to the A7 (same old style sensor).
If the A7R II is used in APS-C mode only (18MP) then you get really sharp outer corners as well.
At least there are rumors that the mirrorless Nikon Z6 (same new BSI sensor like the A7 III) or the Z7 (same new BSI sensor like the A7R II and III) perform slightly better in that respect because of thinner filter stacks in front of the sensors, but I haven't seen any direct comparison yet.

Cheers,


PostPosted: Thu Jan 23, 2020 9:35 am    Post subject: Reply with quote
tb_a wrote:

If the A7R II is used in APS-C mode only (18MP) then you get really sharp outer corners as well.


Yes, but they are not the same corners.

It might be better to use full frame and crop until you get acceptable corners.


PostPosted: Thu Jan 23, 2020 10:41 am    Post subject: Reply with quote
tb_a wrote:

If the A7R II is used in APS-C mode only (18MP) then you get really sharp outer corners as well.


e6filmuser wrote:
Yes, but they are not the same corners.

It might be better to use full frame and crop until you get acceptable corners.


Of course, that goes without saying. Whatever will suit your needs.

Andreas wanted to know if there is any camera (incl. APS-C) which will be as good as the Ricoh GXR-M with these problematic lenses.
To the best of my knowledge, the only alternative would be the A7R II or III in APS-C mode. It's even a little bit better as this will offer a higher resolution and sharp corners.

However, if stopped down to something like F8 to F11 it's IMHO usable in FF-mode as well like I've shown already in this thread.
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