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Voigtlander 21mm f/3.5 Color Skopar Review

  
 
grahamgibson
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p.4 #1 · Voigtlander 21mm f/3.5 Color Skopar Review


I use the Sony 16-35/4 now, so I'd also be curious how it compares at 21mm. I've seen previous comparisons to the Loxia 21, and it's surprisingly close.

The 16-35/4 is a very good all-around lens, though size-wise it's not even close to the CV 21.



Oct 17, 2018 at 03:18 PM
Melindra
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p.4 #2 · Voigtlander 21mm f/3.5 Color Skopar Review




Charlie N wrote:
how are you flying with your a7?

anyhow, I think the main appeal is the size and weight, I'm getting the 21 for that reason, no intentions on getting rid of the 12-24, it's just a tad big at times. I think I'de rather have 18mm tbh, but I'm making due with 21.



I'm not thinking of getting rid of the 12-24 either, I was thinking of adding the 10-18 Laowa, but the latest reviews have me ditching this plans.

The 12-24 means I need to use big, expensive drones, like the XM2 stuff.
If I could reduce the weight significantly I could save the company some cash and since we have 3-4 jobs a week where we lift a 7R+12-24 into the air, that would be good.

The flare is an issue with the 12-24, i often shoot at dusk and dawn and pointing at the sun in some compositions, it's also got some distortion, minimal, but it needs to be corrected in post and less time there would be good.

I tried the Batis 18 but found the 12-24 to perform almost identical and at 18 I can use a CPL etc. The B18 doesn't weigh significantly less either (350g vs 550g).
A Loxia 21 is nice, slightly sharper than the 12-24, much contrastier and significantly smaller, but not lighter (400g) and super pricey.

The CV21 looks perfect at under 250g and with all the contrast and sharpness of the lox, it 'should' be relatively free from distortion to avoid significant post work.



Oct 17, 2018 at 03:51 PM
imagesfromobjects
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p.4 #3 · Voigtlander 21mm f/3.5 Color Skopar Review


Went out for some "tests." After confirming it was centered - it is - I set out to explore. I'm not a big lens-testing-pixel-peeping sorta fella, and regardless, Fred did an outstanding and thorough job of showing how the lens behaves in certain situations, so I wasn't about to try and re-create a similar test, when the results are already readily available.

I'm not going to be using this lens primarily as a landscape lens, if at all. Now that that is out of the way, you should understand that different applications need different criteria more than others. My main use for this lens is for cramped-quarters interior candid work, both for stills and on a gimbal for video. It'll also be used for street/travel, and as a lightweight, "one-lens carry" lens. I can't tell you what a JOY it was to just walk out my door with no bag. Just this tiny little guy on my a7S with a shoulder strap.

For my purposes, my main concern is close-range performance. I'm also interested in how the OOF areas behave when I won't have control over what's in the frame. Handling and haptics are also VERY important, because I like to be able to pre-focus, just by knocking the throw against infinity and pulling back some. If I do this enough times, the lens will become familiar enough to where I know how far to pull back to get someone in focus at various distances. This is also crucial for candid/street work because, at this wide a FL, even with focus magnify, it's almost impossible to tell where critical focus is based off of the LCD when it's at waist-level. So much easier just to use the focus markings on the barrel.

So here are some shots. The camera used was an a7S, so whether these results will be applicable to anyone's needs... who knows, but here they are. I've also uploaded a .ZIP file containing the raws, in case anyone wants to tinker with them. Be advised that I taped over the electrical contacts, so there will be no EXIF data, but also no sneaky baked-in corrections.

All shots were wide open except for those with obvious sunstars, which were at f/5.6. They get cleaner at f/8, but I'm testing for myself, and I'll be using it mostly between 3.5 and 5.6. There is some vignetting wide open, but I don't care. I intentionally tested some wide-open MFD and >2m shots against busy backgrounds (chain link fence, jagged foliage) and I think it did great. There may be some optical vignetting (aka The Helios Swirl) happening, depending on certain conditions. Love it.

So, final thoughts, then. Perfect? No. As good as I'd hoped it would be? Better, actually. Super happy with it.

Without further ado, here's the folder:
Color Skopar 21mm FE Raw Files

Here are the pics:












































Oct 17, 2018 at 03:53 PM
azhenley
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p.4 #4 · Voigtlander 21mm f/3.5 Color Skopar Review


imagesfromobjects wrote:
Here are the pics:



Hmmm what happened to the sun in that last picture? If that is f5.6 I would have expected a more defined sunstar.



Oct 17, 2018 at 04:06 PM
Fred Miranda
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p.4 #5 · Voigtlander 21mm f/3.5 Color Skopar Review


Jman13 wrote:
Fred -

Would you be able to do a comparison of the CV21 to the Sony 16-35 f/4?


I no longer have the 16-35/4 ZA but have tests shots at infinity to compare. So, the crops won't have the same exact lighting but at least we can have an idea of how they compare resolution-wise.

The 16-35/4 performs very well at 21mm so I would not be surprised if it's equal or even better than the CV 21/3.5.
I have the feeling the CV 21 will have stronger corners and the zoom will have stronger mid-zone. Center should be very similar. The Voigtlander has much nicer sunstars and stronger flare resistance.

I will post some crops later today.
Best,
Fred



Oct 17, 2018 at 04:12 PM
Fred Miranda
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p.4 #6 · Voigtlander 21mm f/3.5 Color Skopar Review


azhenley wrote:
Hmmm what happened to the sun in that last picture? If that is f5.6 I would have expected a more defined sunstar.


Perhaps it was wide open which means, no sunstar.



Oct 17, 2018 at 04:15 PM
imagesfromobjects
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p.4 #7 · Voigtlander 21mm f/3.5 Color Skopar Review


...





dont ask.





































swirls




Oct 17, 2018 at 04:17 PM
azhenley
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p.4 #8 · Voigtlander 21mm f/3.5 Color Skopar Review


imagesfromobjects wrote:
...


That third photo has one glorious sunstar!



Oct 17, 2018 at 04:20 PM
rvh23
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p.4 #9 · Voigtlander 21mm f/3.5 Color Skopar Review


Guy, I can see you need a little encouragement here. Just get a good used copy of the Loxia 21 and be done with it. Otherwise you will end up with multiple 21 lenses further down the track when you do buy the Loxia anyway.

GMPhotography wrote:
Problem is which 21 to pick if you don’t have one. Cv is 700 dollars and Loxia is 1500 that’s a 800 dollar swing and between a 2.8 and 3.5 makes zero diffrence in real work for these type of landscape lenses, which is not driven by need for speed. So let’s go from here. Color, to me it looks like just adding a touch of saturation and a bit of clarity to the CV file would fix up that diffrence. Maybe a touch of contrast. This is just post work so not a big deal. Flare looks better on
...Show more




Oct 17, 2018 at 04:56 PM
Fred Miranda
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p.4 #10 · Voigtlander 21mm f/3.5 Color Skopar Review


Purple Fringing and Longitudinal CA

Very good news! The Voigtlander 21/3.5 has low longitudinal CA and it's pretty much free of purple fringing. We already know lateral CA is also very low which makes it just as good as the Loxia 21 regarding chromatic aberration correction.

Here are a few samples showing de-focus and focused areas. Keep in mind that the Loxia was compared at f/3.5 which means the Voigtlander did a fantastic job wide open!





No purple fringing







Only traces of longitudinal CA







Only traces of longitudinal CA




Oct 17, 2018 at 05:45 PM
 


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Fred Miranda
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p.4 #11 · Voigtlander 21mm f/3.5 Color Skopar Review


Conclusion:

Pros
  1. Compact and light lens, ideal for hiking.
  2. Solid all-metal construction with tight manufacturing tolerance.
  3. Excellent resolution at all distances including MFD.
  4. Voigtlander signature color and contrast.
  5. Excellent flare resistance.
  6. Great coma performance wide open.
  7. Low distortion.
  8. 10-blade straight aperture allows well-defined sunstars starting at f/4.
  9. Low chromatic aberrations.
  10. Reasonably priced compared to the competition

Cons
  1. Mounting and un-mounting is troublesome since the only non-rotating lens' surface is very thin
  2. Mid-zone not as great as center and corners at wide apertures due to field curvature.
  3. Pronounced vignetting that never truly goes away



For reference, this review compares the Voigtlander 21/3.5 Color Skopar to the Loxia 21/2.8. In my opinion, Zeiss offers one of the best 21mm lenses on the market. Its proven performance makes it difficult to dethrone, especially considering the new Voigtlander lens is almost half the weight, half the size, and significantly less expensive.

However, to my surprise, the Voigtlander performs quite well and holds its ground compared to the Loxia in terms of resolution and contrast. It is also just as low in color aberration, coma, and distortion and produces equally well-defined sunstars.

Center and corner resolution are quite strong—just one stop down from wide open—while the mid-zone requires two stops for optimal performance to mask the field curvature shape. At f/7.1 and smaller apertures, this lens is sharp throughout the entire field, making it a great option for travel and landscape photography.

Bottom line: Voigtlander gets a lot of things right with this lens. You can’t go wrong with either one, but if you need a lighter, smaller, and less expensive alternative, the Voigtlander is definitely worth considering.

_______________

Order the Voigtlander Color Skopar 21mm f/3.5 E-mount: B&H Photo | Amazon | CameraQuest




Oct 17, 2018 at 07:13 PM
DavidBM
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p.4 #12 · Voigtlander 21mm f/3.5 Color Skopar Review


Fred Miranda wrote:
Purple Fringing and Longitudinal CA

Very good news! The Voigtlander 21/3.5 has low longitudinal CA and it's pretty much free of purple fringing. We already know lateral CA is also very low which makes it just as good as the Loxia 21 regarding chromatic aberration correction.

Here are a few samples showing de-focus and focused areas. Keep in mind that the Loxia was compared at f/3.5 which means the Voigtlander did a fantastic job wide open!


Interesting. Its true the CV is doing a great job given it's wide open. But the bokeh is noticeably more nervous (probably because it is wide open) than the Loxia

For many purposes this won't matter, but I'm doing quite a lot of "intimate forest landscape" work where I focus on things of botanical or structural interest in the forest, and compose an OOF forest background - this sort of thing I do at f3.5-4, and I think based on these samples the Lox would provide a nicer looking image.



Oct 17, 2018 at 07:45 PM
GMPhotography
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p.4 #13 · Voigtlander 21mm f/3.5 Color Skopar Review


rvh23 wrote:
Guy, I can see you need a little encouragement here. Just get a good used copy of the Loxia 21 and be done with it. Otherwise you will end up with multiple 21 lenses further down the track when you do buy the Loxia anyway.



Yea I see that as a good path also.



Oct 17, 2018 at 08:18 PM
rvh23
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p.4 #14 · Voigtlander 21mm f/3.5 Color Skopar Review


Thanks Fred for this great comprehensive review.

One of the remarkable things about the Loxia 21 is its high resolving power across the entire frame (when refocused for corners). The fact that the CV doesn't improve in the mid-zone when refocused is the deal breaker for me, although it looks like corner performance too is worse with the CV if the Loxia is refocused. Whether that translates to any real world differences (at landscape apertures) is a different question, and as you say the CV is a great lower cost alternative.

I suspect however that most who already own the Loxia 21 will be reluctant to give up its remarkable performance and will not be tempted to switch.






Oct 17, 2018 at 08:20 PM
jhinkey
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p.4 #15 · Voigtlander 21mm f/3.5 Color Skopar Review


This is why I like the CV.
Hopefully some images tonight/tomorrow to check it out.

Yes, yes I know that that Nikon lens cap will likely cause my Lox to eventually explode or something worse, but usually the first thing I do with a new lens is put cheap front/rear caps on them so the originals don't get lost or all messed up.

Hopefully the CV will be like my 35/2.8 Sony - it's far from a perfect lens, but it's size/weight make up for it when the situation calls for size/weight to be at a premium (vacations, hiking/backpacking/skiing/etc.).







Oct 17, 2018 at 08:23 PM
cgarcia
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p.4 #16 · Voigtlander 21mm f/3.5 Color Skopar Review


Fred Miranda wrote:
Lateral CA correction

I'd say both lenses perform similarly with very low LaCA. Here is a crop showing both lenses at f/5.6 showing the corners of the frame.

Keep in mind that although both my A7RIII and Lightroom had CA corrected set to "OFF", a built-in profile was applied for BOTH lenses. The only way to stop this is to tape the lens electronics...


An alternative to tape the electronics could it be to use Capture One instead of Lightroom?:

https://feedback.photoshop.com/photoshop_family/topics/disable-built-in-lens-profile

Theoretically the only setting changing the actual raw data is the vignetting correction (if enabled). The others are mere profiles with "instructions" about how to handle the raw data. It seems as if Adobe, at Sony's behest, doesn't allows to disable the one related to chromatic aberration with certain lenses (designed from the beginning with software corrections in mind).

It would be interesting to confirm that C1 allows to decode raws from native lenses with the full set of optical flaws (dcraw should also reveal them). I don't own yet a native lens nor have installed a working Lightroom for Sony raws so can't compare Lightroom with C1. But C1 allows to enable/disable the so called "manufacturer profile" in Sony raws. And by the way, these profiles seem to be ultimately stored, at least partially, in the camera firmware instead of in the lenses (so corrections support for future lenses in older cameras no longer receiving updates could be potentially unavailable).



Oct 17, 2018 at 09:46 PM
Phillip Reeve
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p.4 #17 · Voigtlander 21mm f/3.5 Color Skopar Review


cgarcia wrote:
An alternative to tape the electronics could it be to use Capture One instead of Lightroom?:

https://feedback.photoshop.com/photoshop_family/topics/disable-built-in-lens-profile

Theoretically the only setting changing the actual raw data is the vignetting correction (if enabled). The others are mere profiles with "instructions" about how to handle the raw data. It seems as if Adobe, at Sony's behest, doesn't allows to disable the one related to chromatic aberration with certain lenses (designed from the beginning with software corrections in mind).

It would be interesting to confirm that C1 allows to decode raws from native lenses with the full set of optical flaws (dcraw should also reveal them).
...Show more
An easy way is to turn the lens like you would unmount it but stop as soon as no aperture info is displayed. It will still sit firmly on the camera but there is no more exif contact so you see true vignetting and CA.




Oct 17, 2018 at 11:04 PM
imagesfromobjects
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p.4 #18 · Voigtlander 21mm f/3.5 Color Skopar Review



True, but the hidden corrections aren't the only reason to disable it. Certain behavior happens when there's contact that I don't care for. Firstly, that ridiculous digital distance scale that clutters up the view. Just stop, guys. Secondly, if you try to do anything like change aperture while focus magnify is engaged, it snaps out of it. Maybe wouldn't bother anyone else, but I'd like to just skip all that, even if it means I won't have exif date.

Phillip Reeve wrote:
An easy way is to turn the lens like you would unmount it but stop as soon as no aperture info is displayed. It will still sit firmly on the camera but there is no more exif contact so you see true vignetting and CA.





Oct 17, 2018 at 11:51 PM
davidjl
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p.4 #19 · Voigtlander 21mm f/3.5 Color Skopar Review


Fred Miranda wrote:
Conclusion:

Cons
  1. Mounting and un-mounting is troublesome since the only non-rotating lens' surface is very thin



This is a problem with many of these lenses. With the 25/2.4 Lox, I find I have to twist the focus ring all the way in the appropriate direction and then attach or remove it. At which point it's not a problem. Until one is used to doing this, though, it is an irritation. The 40/1.2 only has a tiny grip ring near the mount and is almost as bad. Worse, in that the focus ring throw is much wider. The 25/2.4's throw is pretty short, so it's always close to where it needs to be.

Whatever, thanks for all the reviews!

Oh, yes. By the way, I asked at the local camera store (Shinjuku, Tokyo) when I bought the Lox 25/2.4 (3 days ago) if the Zeiss Loxias were made by Cosina. The salesperson muttered something to the effect of "well, maybe". But as I was collecting my purchase and about to leave the store he said "You've got 2 weeks to return it. Be sure to test it thoroughly during that period. Cosina's quality control is really good and we rarely have problems, but it's best to be safe."





Oct 17, 2018 at 11:52 PM
Gunzorro
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p.4 #20 · Voigtlander 21mm f/3.5 Color Skopar Review


It does seem like a great little lens if you don't already have something like the Loxia. I've got the Loxia 21, the 12-24/4G, and Canon's 16-35/4L IS, so I'm pretty well covered at 21mm.

I've got other lenses I'd like to upgrade, to such as a great AF 50mm f/1.4 (Sigma Art or Sony?).



Oct 18, 2018 at 12:37 AM
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