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Author Topic: Voigtlander Ultra Wide-Heliar 12mm f/5.6 ASPH Lens Samples *****  (Read 7077 times)

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Finder

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Voigtlander Ultra Wide-Heliar 12mm f/5.6 ASPH Lens Samples *****
« on: February 18, 2010, 09:12:30 PM »
I just thought I would kick off this sample thread. I just got this and am just playing.
« Last Edit: May 11, 2011, 02:38:39 PM by M5-User »

Finder

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #1 on: February 18, 2010, 09:12:52 PM »
One more.

Offline gareth

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #2 on: February 19, 2010, 12:22:06 AM »
Thanks for photos, Finder.

Due to small size of the photos, I cannot appreciate the clarity at the shadow part of the brick pillars photo as well as the right upper corner of the dog statue one. Is it possible to post larger photos ? Thanks.

BTW, LTM mount or M-mount?

Finder

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #3 on: February 19, 2010, 07:49:04 AM »
100% not processed.


Finder

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #4 on: February 19, 2010, 07:49:50 AM »
100% not processed. (Although I don't know how one-hundred-percenty these are as the forum seems to resize uploads.)
« Last Edit: February 19, 2010, 08:04:41 AM by Finder »

Finder

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #5 on: February 19, 2010, 01:54:01 PM »
Sorry, it is the LTM mount. The M-mount is the Aspherical II.

Offline Zephyr

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #6 on: February 19, 2010, 02:39:39 PM »
@ Finder How do you feel about f/5.6? I feel a bit too slow, but the lens itself is so beautiful! ;D


Nice shots

Finder

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #7 on: February 19, 2010, 03:26:10 PM »
Well, with IS and high ISOs, it is not really that limiting. I was using it indoors last night at f/5.6 with exposures around 1/20s–1/40s at 1600ISO in aperture priority. Also, when you think the Olympus 9-18mm zoom is an f/4-5.6, and the 14-45mm zoom is f/3.5-5.6, it is not really that slow. But I use medium-format cameras which tend to have slow optics anyway, so it does not bother me that much.

Finder

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #8 on: February 19, 2010, 04:05:30 PM »
I should show the camera with the lens. The matching finder is a Panasonic Lumix DMW-VF1 for a 4:3 aspect ratio camera. The finder is small. Eye relief is on the short side. It has parallax correction lines for 50cm. Like most viewfinders it shows an approximation of the field of view--it is a little smaller than the actual field of view which is standard practice for viewfinder designs. I have an affinity for rangefinder/viewfinder cameras so it does not both me. SLR folks may be more annoyed with using it. However, I turn my monitor off and simply zone focus--it is a lot of fun.

BTW, you really don't "focus" a 12mm lens. Depth of field is so deep zone focusing is rather easy, even if you are conservative with the depth of field scales on the lens.

P.S. the other lenses are an Olympus 17mm and finder and Minolta 90mm f/4 M-Rokkor.

One more thought--the monitor level can be really handy doing architecture/interiors.

« Last Edit: February 19, 2010, 04:11:27 PM by Finder »

Offline count_zero

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #9 on: February 19, 2010, 05:00:45 PM »
Quote
Depth of field is so deep

I don't think the DoF is affected because the lens is wider.  The area in width that is in focus does improve, but not the depth.  However, 4/3 sensor does double DoF in general.

Offline adash

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #10 on: February 19, 2010, 05:10:49 PM »
@count_zero
DoF increases as focal lenght decreases.
Take a look at these mages:



See how DOF lines converge towards telephoto end.
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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #11 on: February 19, 2010, 05:55:55 PM »
DoF increases as:

Focal length decreases
Aperture decreases
Object distance increases
Size of display image deceases
Displayed image viewing distance increases

(Cropping decreases DoF)

The 12mm has a lot of depth of field primarily because of its focal length. However, I will get more depth of field out of it if I use it on the 35mm camera it was designed for because the resulting image will be enlarged less.
« Last Edit: February 19, 2010, 06:10:02 PM by Finder »

Offline gareth

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #12 on: February 19, 2010, 06:11:08 PM »
Olympus manual mentions that the 2x crop factor applies to both focal length conversion and effective DOF.

The UW-Heliar is thus used as a 24mm (for cropped image) f/11 (for effective DOF)
The hyperfocal distance is 3.5M.

It's a formidable PnS lenses in the street. :)

Finder

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #13 on: February 19, 2010, 06:25:34 PM »
Another

Offline adash

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #14 on: February 19, 2010, 06:25:51 PM »
Olympus manual mentions that the 2x crop factor applies to both focal length conversion and effective DOF.

The UW-Heliar is thus used as a 24mm (for cropped image) f/11 (for effective DOF)
The hyperfocal distance is 3.5M.

It's a formidable PnS lenses in the street. :)


Did not get it on the effective DoF, I guess I have to read more.
The hyperfocal distance for wide open tuns out to be 1.71m however,
at least according to http://dofmaster.com/dofjs.html
This means that setting this aperture and setting the lens to focus on the hyperfocal distance,
you will get acceptably sharp images from half that distance to infinity.
@Finder
Putting the lens in question on a bigger sensor camera, or ultimately on a 135 film one will result in less DOF. Smaller sensors give more DOF. P&S cameras give more dof than pen, pen gives more dof than DSLRs, and cellphone cameras give most dof due to their microscopic sensors.
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Offline adash

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #15 on: February 19, 2010, 06:28:31 PM »
@Finder
Congrats for the nice pics and this big glas of yours.
Sure the wideangle is a lot of fun to use  8)
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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #16 on: February 19, 2010, 06:38:02 PM »
@Finder
Putting the lens in question on a bigger sensor camera, or ultimately on a 135 film one will result in less DOF. Smaller sensors give more DOF. P&S cameras give more dof than pen, pen gives more dof than DSLRs, and cellphone cameras give most dof due to their microscopic sensors.

Only when the field (angle) of view is the same (you will note that focal length on the smaller sensor cameras is also smaller). So a 24mm lens on a 35mm camera has less depth of field than a 12mm lens on a m4/3. While we are talking about the same field of view, we are also talking about two different lenses.

A 12mm lens on a 35mm camera gives a 115 degrees field of view--much more than I get with the E-p1. Since I magnify the 35mm image less to make the same display size, I get more depth of field. However, the 35mm and m4/3 images do not look the same--the 35mm is wider. So when I use the depth of field scales on the lens I tend to be a bit conservative.

Thanks. I am having fun with it.
« Last Edit: February 19, 2010, 06:42:19 PM by Finder »

Offline adash

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #17 on: February 19, 2010, 07:52:31 PM »
@Finder
Sorry, it is almost 6 in the morning here...I had to double check to finally see you are right. m4/3 is actually getting less DOF from the same physical lens. Actually about half the DOF on 35mm. It is double the DOF of the 35mm if the 35mm camera has a lens with a focal lenght double that on the PEN.
Now I'm confused  :o
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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #18 on: February 19, 2010, 08:13:18 PM »
adash, it is easy to get confused over DoF or rather how it works. Especially at 6 in the morning.

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #19 on: February 19, 2010, 08:45:21 PM »
The DoF is minimally affected by focal length/distance.  See the tables here http://www.cambridgeincolour.com/tutorials/depth-of-field.htm

It's how you interpret the numbers.  14mm 4/3 at f8 and 2m you have 0.87m to infinity DoF.  With 28mm full frame, same f-stop and focal distance DoF drops to 1.2m to 5.6m (about 4.4m DoF).  But, 14mm full frame with same settings yields .6m to infinity DoF.  You might ask, why 2m focal distance?  Because I'm 6 feet tall, so I autofocus on the floor and set the camera to f8 to get the hyper focal distance.  After that, the math is easy.  Drop it down to f5.6 I get 1-20m Dof, then f3.5 is about 1-5m.  So, yes there isn't much point in using autofocus with wide lenses. 

Offline cosinaphile

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #20 on: February 19, 2010, 09:11:57 PM »
i would love to own that les ive got the 15 and love it but that 12 is beyond awesome 

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #21 on: February 19, 2010, 09:39:03 PM »
I'm really looking forward to the 14mm f2.8 from panny.  Hopefully, its reasonably priced.

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #22 on: February 23, 2010, 06:18:27 PM »
Another


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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #23 on: February 24, 2010, 02:34:14 PM »
Playing at lunch:

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Re: Voigtlander Ultra Wide-Heliar 12mm F5.6 Aspherical
« Reply #24 on: February 24, 2010, 02:35:07 PM »
A homage to modernism

 

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