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Voigtländer 20mm f/3.5
SL-II Aspherical AI-P (2009- )
© 2010 KenRockwell.com. All rights reserved.

Intro   Specs   Performance   Compared   Recommendations

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Voigtlander 20mm f/3.5

Voigtländer 20mm f/3.5 SL-II, Nikon mount, much larger than actual size. enlarge. (52mm filters, 7.0 oz./199g, about $550. Also comes in Canon EOS and Pentax mounts.) This one came from this link to it at Adorama. This free website's biggest source of support is when you use that, or any of these links, when you get anything. Thanks! Ken.

 

September 2010       more Voigtländer Reviews    Nikon   Canon   LEICA   Pentax

How to Use Ultrawide Lenses

20mm lens falloff comparison

Sharpness Comparison to other 20mm lenses

Zeiss 21mm Comparison

 

Ideal Uses

Ultra-compact, high-performance ultrawide lens.

 

Not for

No autofocus; I wouldn't use it for sports, kids or action since it's too hard for me to track focus by hand.

For the same price, you can get the real manual-focus Nikon 20mm f/2.8 AI-s or autofocus Nikon 20mm f/2.8 AF-D.

 

Optics:
Ergonomics: (manual focus)
Usefulness:
Availability:
Overall: expensive

 

Introduction       top

Intro   Specs   Performance   Compared   Recommendations

adorama

 
B&H Photo - Video - Pro Audio

Ritz Camera

I personally buy from Adorama, Amazon, Ritz, B&H, Calumet and J&R. I can't vouch for ads below.

 

This Voigtländer 20mm f/3.5 SL-II is a very compact ultrawide lens that comes in versions for Nikon, Canon EOS and Pentax. (The Pentax mount has been discontinued from lack of interest.)

This Voigtländer. is even smaller and lighter than Nikon's smallest 20mm lens, the Nikon NIKKOR 20mm f/4.

I am addressing the Nikon version here, and using it on full-frame. You may make the usual inferences when used on different cameras or formats. I'll compare it to Canon lenses, too, if you read the review carefully.

It works great on just about any camera, especially on Nikon FX and Canon full-frame cameras.

It's a joy to use: its focus feels better than my Nikon lenses!

The performance of this tiny Voigtländer lens is as good as Nikon's lenses, regardless of size.

 

Compatibility       intro     top

The Voigtländer 20mm f/3.5 is a manual-focus lens, and has an on-board computer to work with the meters and electronics all Nikon manual focus, autofocus and digital cameras.

So long as you don't mind moving the ultra-smooth focus ring all by yourself, this AI-P type lens should be compatible with every Nikon made since 1977.

The Canon version also has CPU contacts for what should be complete compatibility with metering and exposure automation on any of the Canon EOS 35mm and digital cameras made from 1987 through today. You have to focus by hand (look for the AF sensor blips to confirm focus instantly), and otherwise you're all set.

 

Voigtlander 20mm f/3.5

Voigtländer 20mm f/3.5 SL-II. enlarge.

 

Specifications         top

Intro   Specs   Performance   Compared   Recommendations

Name

Cosina calls this the Voigtländer Color-Skopar 20mm f/3.5 SL-II ASPHERICAL.

Color-Skopar is an old trademark dredged-up from the 1950s, as is the Voigtländer name.

 

Optics            top

9 elements in 6 groups.

One aspherical element.

Multicoated.

Focal Length: 20mm, which looks like 30mm when used on DX.

 

Angle of View        top

94° on FX and 35mm.

71° on small-format DX.

 

Diaphragm            top

Voigtlander 20mm f/3.5

Voigtländer 20mm f/3.5 SL-II at f/5.6. enlarge.

9 blades.

Circular to f/5.6, nonagonal from f/11.

Stops down to f/22.

 

Aperture Ring            top

Yes.

Metal.

Full-stop clicks, except that Voigtländer forgot the click at f/4!

 

Close Focus            top

0.65 feet (0.2 meters or 8 inches).

 

Maximum Reproduction Ratio            top

1:6.1.

 

Hard Infinity Focus Stop?            top

Yes.

This is great for astronomy; just turn to the stop and you have fixed laboratory-perfect focus all night.

 

Focus Scale            top

Yes.

 

Depth-of-Field Scale            top

Yes.

 

Infra-Red Focus Index            top

No.

 

Filter Thread            top

52mm, metal.

Does not rotate.

 

Size            top

1.128" (28.64mm) extension from flange by x 2.51" (63.7mm) diameter, measured.

Voigtländer specifies 28.8mm extension from flange by 63mm diameter.

 

Weight            top

7.040 oz. (199.5g), measured.

Voigtländer specifies 205g.

 

Hood            top

Optional LH-20, $45!

 

Made in            top

Japan.

 

Packaging            top

It comes in a small, semi-glossy black corrugated cardboard box with two white foam inserts.

Voigtlander 20mm f/3.5

Box, Voigtländer 20mm f/3.5 SL-II.

 

Performance       top

Intro   Specs   Performance   Compared   Recommendations

Overall   Focus   Color  Distortion   Ergonomics   Falloff

Filters   Color Fringes   Macro   Mechanics   Sharpness   Sunstars

 

Overall      performance     top

The 20mm f/3.5 SL-II is a sharp, ultra-compact, well-made lens.

Its performance is similar to Nikon's lenses, but smaller in size and better with filters.

I'm referring to its performance on Nikon below. I tried this Nikon-mount sample with a crummy adapter on a 5D Mark II, and it didn't work anywhere near as well optically as a Canon 16-35mm f/2.8 L II. I suspect the proper Canon-mount version should perform much better on Canon.

 

Focus      performance     top

Manual focus is beautiful. It's as smooth as silk, perfectly damped with no play.

The D3, D3X, D3s, D700, F4, F5, F6 and most professional AF cameras have three very precise electronic manual focus indicators, with which this lens works perfectly.

Lesser digital cameras, like the D300s and down, usually have just one "OK" focus dot, which is not as precise as two arrows and a dot.

 

Color Rendition      performance     top

Color Balance

I see no difference from my multicoated NIKKOR lenses.

Using this Nikon-mount sample with a crummy adapter on a 5D Mark II, it was somewhat warmer than a Canon 16-35mm f/2.8 L II. I don't know if the correct electronics of the proper Canon-mount version would key-in the correct data for better auto white balance better, possibly it does.

 

Peripheral Color Shift

Because most anti-reflection coatings become differently efficient at different angles, often ultra-wide lenses show color shifts towards blue in the corners. This has been around since film; it's not an artifact of electronic sensors.

The only lenses that have licked this well are the Nikon 16-35mm and Nikon 14-24mm.

This Voigtländer is also pretty good; I really have to go out of my way to see any shift towards blue in the corners.

Voigtlander 20/3.5 peripheral color shoft

Full-Frame Color Rendition, f/8.

With a flat plate it looks pretty scary, but actually, it's invisible in real photos.

 

Distortion      performance     top

The Voigtländer 20mm f/3.5 has a little more distortion than Nikon's 20mm fixed lenses.

 

On Full Frame

Distortion is complex on full frame, similar to Nikon's fixed 20mm lenses, just a little more of it.

It's bulged-out in the center and pulled-out towards the sides.

Vertical straight lines stay straight, except about 1/4 to 1/2 of the way out from the center. Along the sides, they stay straight.

A line near and along the long edge of the frame bends and wiggles, as with Nikon's fixed 20mm lenses, just a little more.

 

On DX

Not that it makes any sense to use this lens on DX (since even the kit 18-55mm DX lenses cover 20mm, for free), but if you do, distortion is strong, but simple and easy to correct.

 

Corrections

To correct the distortion on full-frame, you need a complex tool beyond Photoshop's simple 1st-order lens distortion filter.

On DX, you're fine.

Try these coefficients in Photoshop's lens distortion filter:

 
FX and Film
10' (3m)
0 to -1
+2.0

© 2010 KenRockwell.com. All rights reserved.

On FX, it's best to leave it alone. If you add -1, you'll bug-out the center even more, and if you leave it alone, the sides pull out. You can't win.

On DX, it corrects completely.

 

Ergonomics      performance     top

Voigtlander 20mm f/3.5

Voigtländer 20mm f/3.5 SL-II. enlarge.

The Voigtländer 20mm f/3.5's ergonomics are perfect.

The focus and aperture controls are just right!

Likewise, the grab ring in the middle works great for mounting and unmounting, but is is pretty small.

The red numbers are almost invisible in actual use; they are greatly enlarged and enhanced here for the sake of a pretty picture.

Here are the colors as they actually look, at about actual size on most computer monitors (106 DPI):

 

Voigtlander 20mm f/3.5

Actual size and color at 106 DPI.

 

Falloff (darkened corners)          performance     top

Falloff on FX is visible at f/3.5 and f/4, still there at f/5.6, and gone by f/8.

I've exaggerated this by shooting a gray field and placing these on a gray background:

 

Voigtländer 20mm f/3.5 SL-II falloff on FX and film at infinity, no correction.

f/3.5
f/4
f/5.6
f/8

© 2010 KenRockwell.com. All rights reserved.

 

 

 

Filters, Use with      performance     top

Filter users rejoice: I easily can stack two Nikon filters and get no vignetting on full-frame!

This is better than any of Nikon's 20mm lenses or zooms. Bravo!

I have to stack three 52mm Nikon filters to start getting any vignetting.

Even though a standard thick rotating polarizer works without vignetting, don't use a polarizer; they don't work with well with any 20mm lens because the polarization of nature itself varies over such a broad angle.

 

Lateral Color Fringes      performance     top

There are no lateral color fringes on the Nikon D3, which automatically corrects them.

I tried this Nikon-mount sample with a crummy adapter on a 5D Mark II, and it has magenta-green lateral fringes. Its lateral fringes are almost identical to the Canon 16-35mm f/2.8 L II at 20mm.

 

Macro      performance     top

This Voigtländer lens focuses more closely than other 20mm lenses, but it still doesn't do macro. Here's how close you get on full-frame:

Voigtlander 20mm f/3.5

On full-frame at 0.2 meters.

Here's a crop at 100% from this image, which is pretty darn sharp:

Voigtlander 20mm f/3.5

Crop from above.

 

Mechanics      performance     top

Voigtlander 20mm f/3.5

Voigtländer 20mm f/3.5 SL-II. enlarge.

The Voigtländer 20mm f/3.5 SL-II is built very well.

 

Barrel Exterior

Anodized aluminum (no enamel).

 

Filter Threads

Anodized aluminum.

 

Filter Adapter and Hood

Threaded anodized aluminum, engraved.

 

Focus Ring

Metal, rubber covered.

 

Focus Helicoids

Feels like brass: smooth and silky with no play or need for damping grease.

 

Depth-of-Field Scale

Engraved into barrel and filled with paint.

 

Internals

All metal.

 

Aperture Ring

Machined anodized aluminum.

Engraved markings.

 

Mount

Dull-chrome.

 

Markings

Engraved into the metal and filled with paint.

 

Identity and Serial Number

On the bottom of the barrel, engraved into the metal and filled with paint.

 

Ass-Gasket (dust seal at mount)

No.

 

Noises When Shaken

Clicking from the diaphragm blades and actuation system.

 

Made in

Japan.

 

Sharpness      performance     top

Warning 1: Image sharpness depends more on you than your lens.

Warning 2: Lens sharpness doesn't mean much to good photographers.

The 20mm f/3.5 SL-II is as sharp, sometimes better and sometimes worse, as Nikon's other 20mm lenses and zooms.

This Voigtländer is the same or better than Nikon at f/3.5 and f/4, and the same or worse when stopped down.

The differences are amazingly minor; these lenses are all pretty much the same overall.

See my Sharpness Comparison to other 20mm lenses for more.

This said, this lens is sharp all over at every aperture. Unlike most lenses, its performance doesn't vary much with aperture.

When I tried this Nikon-mount sample with a crummy adapter on a Canon 5D Mark II, it was much softer than a Canon 16-35mm f/2.8 L II at 20mm. I suspect the proper Canon-mount version will perform much better on Canon.

 

Sunstars      performance     top

At smaller apertures, the diaphragm takes on straight sides and its 9-bladed diaphragm will make great 18-pointed sunstars.

 

Compared        top

Intro   Specs   Performance   Compared   Recommendations

This lens is smaller and lighter than anything from Nikon, ever.

Flare and ghost performance are much better than any of Nikon's fixed 20mm lenses or most zooms. The Nikon 16-35mm VR and 14-24mm are as ghost resistant as this Voigtländer.

Sharpness is about the same, see my Sharpness Comparison to other 20mm lenses for details.

Distortion is a very little bit worse.

The biggest difference, other than size, is that it's easy to use at least two stacked filters with no vignetting on full-frame, something impossible with any fixed Nikon 20mm lens.

Falloff is the same as Nikon's lenses.

Zeiss 21mm Comparison.

Comparing a Nikon-mount sample on a crummy adapter on a Canon 5D Mark II, it was much softer than a Canon 16-35mm f/2.8 L II at 20mm. I suspect the proper Canon-mount version will perform much better on Canon.

 
Anni
2010-
2009-
1984-
1977-1984
1974-1978
1967-1974
Filter
77mm
52mm
62mm
52mm
52mm
52mm
Threads
Plastic
Metal
Metal
Metal
Metal
Metal
Barrel
Plastic
Metal
Metal
Metal
Metal
Metal
Weight
678g
199.5g
259g
232g
209g
388g
Weight
23.9 oz.
7.040 oz.
9.1 oz.
8.2 oz.
7.4 oz.
13.7 oz.
Price, USA,
September 2010

 

Recommendations       top

Intro   Specs   Performance   Compared   Recommendations

The Voigtländer 20mm f/3.5 SL-II is an optically and ergonomically superb lens, but it's too expensive. For the same price, you can buy the real manual-focus Nikon 20mm f/2.8 AI-s or autofocus Nikon 20mm f/2.8 AF-D.

The reasons to get this Voigtländer over Nikon is:

Small size and weight.

Better ability to use stacked filters.

Much better ghost resistance than Nikon's fixed 20mm lenses, but same as 16-35mm VR and 14-24mm.

If this is what you want, go for it, but do consider treating yourself to a brand-new Nikon 20mm f/2.8 AI-s.

This Voigtländer lens gives the same optical performance as the 16-35mm VR and 14-24mm, albeit with more distortion, but with only one-third to one-fifth the weight, and a fraction of that volume.

Don't let me whine too much about price; this lens is made by the same company that makes the Zeiss lenses that are way too big and sell for even more money. I'd be much more likely to buy one of these Voigtländer lenses for myself (I did buy the 40mm f/2) than any of Zeiss' behemoths.

I can't speak for the Canon version. A Nikon-mount sample on a crummy adapter on a Canon 5D Mark II was much softer than a Canon 16-35mm f/2.8 L II at 20mm, and I hope the proper Canon-mount version, which I have not evaluated, will perform much better.

 

Deployment      top

I'd pitch the 52mm Voigtländer cap and get a new 52mm "pinch" type Nikon cap.

I'd leave either a 52mm Nikon Clear (NC - UV) filter, or a 52mm Hoya Super HMC UV on the lens at all times.

If I was working in nasty, dirty areas, I'd forget the cap, and use an uncoated 52mm Tiffen UV filter instead. Uncoated filters are much easier to clean, but more prone to ghosting.

For color slides like Velvia 50, I use an old Nikon A2 or new 52mm Hoya HMC 81A outdoors.

For B&W film outdoors, I'd use an old Nikon Y48 or O56, or a new 52mm Hoya HMC K2 Yellow or 52mm Hoya HMC Orange.

 

More Information      top

Cosina.

 

Help me help you         top

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