Tagged with lens - Personal View Talks http://www.personal-view.com/talks/discussions/tagged/lens/feed.rss Sun, 29 Nov 15 05:17:47 -0700 Tagged with lens - Personal View Talks en-CA How lenses are made http://www.personal-view.com/talks/discussion/51/how-lenses-are-made- Wed, 04 May 2011 08:41:59 -0600 Vitaliy_Kiselev 51@/talks/discussions

Cosina video

14-140mm F3.5-5.6 Panasonic zoom lens, 2013 version http://www.personal-view.com/talks/discussion/6780/14-140mm-f3.5-5.6-panasonic-zoom-lens-2013-version Tue, 23 Apr 2013 04:21:32 -0600 Vitaliy_Kiselev 6780@/talks/discussions image


  • 14-140mm lens
  • Power O.I.S. stabilization
  • F3.5 on wide - F5.6 on tele
  • Minimum aperture - F22
  • Diaphragm blades - 7
  • 14 elements in 12 groups, 2 aspherical + 2 ED lenses
  • Minumum focus distance - 0.30 m
  • Weight - 265 g
  • Diamater - 67 mm
  • Length - 75 mm
  • Comes with hood
  • 58 mm filter threads
  • $699 price

Available at:



Check near the end

RJ Lens Turbo m43 adapters http://www.personal-view.com/talks/discussion/9086/rj-lens-turbo-m43-adapters Fri, 13 Dec 2013 14:13:02 -0700 Vitaliy_Kiselev 9086@/talks/discussions image


Above is Nikon F/G - m43 0.71x.


  • m42 to m43
  • Nikon F /G to m43 (new, with tripod mount ring, check photo above)
  • Canon EOS (passive) to m43 (new, with tripod mount ring, check photo above)
  • Canon FD to m43
  • Monolta MD to m43
  • Pentax K to m43
  • Pentax PKA to m43 (for lenses without aperture rings)

Improved optics making is sharper than Mitakon offerings.

Price: adapters without tripod mount - $122, with tripod mount - $129
Shipping: Price already includes shipping for all countries.

I want to buy this adapter.

12-35mm F2.8 Panasonic lens topic http://www.personal-view.com/talks/discussion/3283/12-35mm-f2.8-panasonic-lens-topic Sun, 20 May 2012 20:41:13 -0600 Vitaliy_Kiselev 3283@/talks/discussions image

Price: $1299, 1100 Euro, 999 pounds

Avilable at:

Press release:


Previews and reviews:


GH4 with V-Log - Christies Promo http://www.personal-view.com/talks/discussion/14072/gh4-with-v-log-christies-promo Tue, 17 Nov 2015 02:08:04 -0700 thougts2uk 14072@/talks/discussions Hi Everyone,

Just sharing with you a video we just made for Christies in Hong Kong. It was shot on the GH4 using V-Log.

We only had 6 hours to shoot 60+ watches so it was quite a challenge.

Be good to get the communities feedback.


15mm F1.7 Leica m43 lens topic http://www.personal-view.com/talks/discussion/8456/15mm-f1.7-leica-m43-lens-topic Wed, 16 Oct 2013 23:47:19 -0600 Vitaliy_Kiselev 8456@/talks/discussions

Panasonic is announcing a commercialization of new digital interchangeable lens LEICA DG SUMMILUX 15mm / F1.7 ASPH. complying Micro Four Thirds System standard.


The LEICA DG SUMMILUX 15mm / F1.7 ASPH. is an excellent 15mm single focal length lens of F1.7 clearing LEICA’s stringent standard. It also features sophisticated exterior that matches the stylish design of the world’s smallest LUMIX GM digital single lens mirrorless (DSLM) camera.

In addition to “LEICA DG SUMMILUX 25mm / F1.4 ASPH.” and “LEICA DG MACRO-ELMARIT 45mm / F2.8 ASPH. / MEGA O.I.S.” which are already released to the market, Panasonic has also announced product commercialization of LEICA DG NOCTICRON 42.5mm / F1.2 to enhance the lineup of LEICA digital interchangeable lens, attracting professional photographers worldwide.

In the meanwhile, Panasonic is further expanding the range of LUMIX G digital interchangeable lens with the development of new LUMIX G VARIO telephoto zoom lens of 35-100mm in stylish, compact design that also matches the LUMIX GM camera.


Available at:

35mm F2 YUNGNUO lens for Canon http://www.personal-view.com/talks/discussion/12092/35mm-f2-yungnuo-lens-for-canon Sun, 04 Jan 2015 05:48:43 -0700 Vitaliy_Kiselev 12092@/talks/discussions image

  • Closest focusing distance - 0.25m
  • 7 aperture diaphragm



Looking for a single focus anamorphic for sale http://www.personal-view.com/talks/discussion/14082/looking-for-a-single-focus-anamorphic-for-sale Wed, 18 Nov 2015 16:38:39 -0700 AnamatisRmG 14082@/talks/discussions I have a kowa and isco set up now. Using a BMPCC and FS100. My lenses are double focus right now though and I'm looking to move to faster set ups.

FOR SALE - Anamorphic Lens http://www.personal-view.com/talks/discussion/9393/for-sale-anamorphic-lens Sun, 19 Jan 2014 18:35:27 -0700 Brokenbarrelpro 9393@/talks/discussions Hi I'm selling a Gottingen ISCO Kiptar 2x anamorphic lens + closeup filter, with additional mounts to use on a rig / tripod.

Great for M4/3 cameras.

Nikon 35mm, Nikon 50mm Ai S http://www.personal-view.com/talks/discussion/14030/nikon-35mm-nikon-50mm-ai-s Wed, 04 Nov 2015 21:10:28 -0700 Albi 14030@/talks/discussions $175 +shipping and paypal costs

50mm lenses, fast ones http://www.personal-view.com/talks/discussion/369/-50mm-lenses-fast-ones Mon, 11 Jul 2011 03:12:30 -0600 Tesselator 369@/talks/discussions


During the shooting of the Takumar I caught some specular reflections. I recently built an automatic indoor bird bath for my parrot and it's got a little lightshow that goes off every time it turns on. Those lights showed up in the test chart without me noticing - and I'm way too lazy to reshoot. :D

These were all done on the 1m chart at ISO 100, with AE turned on. WB was set to the chart's white looking through the Canon FD 50/1.4 SSC and left there so the color differences (for white at least) could be compared. I only included the right and left corners cuz that's pretty much mid-area if shot on a FF anyway (not center, but mid).

This test obviously won't tell everything about a lens like how sharp it is when focused to infinity or what the bokeh is like, but I guess it's a pretty good comparison for these to show sharpness at one meter. And 1 to 3 meters is nice bust portraiture with a 50mm on the GH1.

The chart numbers are to be multiplied by 100 to get LPP (Lines Per Picture). But actually, since I was pulled out just a tad in order to use the box for framing the shots, maybe multiplying by 107 or so would be more accurate. :D I shot them all in 4x3 format on a Linhof tripod, with the 10s timer, using the 15X zoom MF assist - using the right-most red box (above) as the focus point.

The Canons seem to be the winners (in this test) but all of those are IMO excellent lenses - except the Rokkor-PF F/1.7 maybe. And it's an awesome looking antique. I have a bunch of other 50's that start at 2.0 or greater which are also very wonderful - like the 55/2.8 Nikkor Micro, the Minolta AF 50/2.8 Marco or some of the Zeiss/Jena Biotars and various Tessar implementations, etc..

I also wanted to test the Voigtlander 50/1.5 but I can't seem to find my adapter.]]>
12mm f/2.0 Olympus M. Zuiko Digital ED Lens http://www.personal-view.com/talks/discussion/502/12mm-f2.0-olympus-m.-zuiko-digital-ed-lens Tue, 26 Jul 2011 14:50:42 -0600 No_SuRReNDeR 502@/talks/discussions
Available at:

* http://www.amazon.com/Olympus-Zuiko-Digital-Thirds-Cameras/dp/B0058PL9R0/
* http://www.ebay.com/sch/Lenses-/3323/i.html?_from=R40&_nkw=12mm+olympus
Samyang/Rokinon cine lenses http://www.personal-view.com/talks/discussion/4029/samyangrokinon-cine-lenses Tue, 24 Jul 2012 19:28:27 -0600 Vitaliy_Kiselev 4029@/talks/discussions Rokinon 35mm T1.5 cine lens will be available in U.S in few weeks and Rokinon 24mm T1.5 & 14mm T3.1 cine lens will be available in U.S in September.

Available at:

FS: 12mm F1.6 SLR Magic and Panasonic PZ 45-175mm F4.0-5.6 http://www.personal-view.com/talks/discussion/11809/fs-12mm-f1.6-slr-magic-and-panasonic-pz-45-175mm-f4.0-5.6 Thu, 20 Nov 2014 19:00:51 -0700 DanDOF 11809@/talks/discussions I am considering switching to Sony E-Mount, so I have on offer my two favorite lenses (tentative if there is a good offer).

12mm F1.6 SLR Magic lens in mint condition with original box and lens cap. - Asking price $450

Panasonic Lumix G X Vario PZ 45-175mm f/4.0-5.6 ASPH. lens in good condition (the silver sticker on the lens is coming off, but does not look bad). - Asking price $325

I keep my equipment in a smoke free, pet free home. I always have a UV filter or ND filter on my lenses, at all times. I am extremely careful when changing lenses.

PM me your offers, thanks!

Canon EF 50mm f/1.8 STM Lens http://www.personal-view.com/talks/discussion/13944/canon-ef-50mm-f1.8-stm-lens Fri, 16 Oct 2015 19:56:29 -0600 seeblind 13944@/talks/discussions I own a GH2

I recently purchased the following lens from B&H:


and the following adapter from Amazon:


Thing is, I can't get the lens to focus. Does it need to be activated by a Canon camera and then set to MF? Do I need an active adapter to use this lens? Did I totally screw up this purchase bundle?

Still pretty much a noobie on understanding lenses. Any and all help or explanations would be much appreciated!!

15-30mm F2.8 Tamron http://www.personal-view.com/talks/discussion/11347/15-30mm-f2.8-tamron Sun, 21 Sep 2014 03:58:23 -0600 Vitaliy_Kiselev 11347@/talks/discussions


35-100mm F2.8 X lens topic http://www.personal-view.com/talks/discussion/4610/35-100mm-f2.8-x-lens-topic Mon, 17 Sep 2012 08:01:13 -0600 Vitaliy_Kiselev 4610@/talks/discussions image


  • Lens Construction - 18 elements in 13 groups (2 ED lenses , 1 UED lens)
  • Nano Surface Coating
  • Optical Image Stabilizer - POWER O.I.S.
  • Focal Length: f=35-100mm (35mm camera equivalent 70-200mm)
  • Aperture Type: 7 diaphragm blades / Circular aperture diaphragm
  • Maximum Aperture: F2.8
  • Minimum Aperture: F22
  • Closest Focusing Distance: 0.85m / 2.8ft
  • Maximum magnification: Approx. 0.1x / 0.2x (35mm camera equivalent)
  • Filter Size: 58mm / 2.3in
  • Max. Diameter: Approx 67.4mm / 2.7in
  • Overall Length: Approx. 99.9mm
  • Weight: Approx. 360g

Good to have separate one :-)

Reviews and previews:


Price: $1499

Available at:



11-20mm F2.8 PRO Tokina http://www.personal-view.com/talks/discussion/12035/11-20mm-f2.8-pro-tokina- Fri, 26 Dec 2014 09:14:16 -0700 konjow 12035@/talks/discussions image


  • 14 lenses in 12 groups
  • F2.8-F22 aperture
  • 28cm minimum focus distance
  • 82mm filter size
  • Nine blades diaphragm
  • 89 x 92 mm
  • 560g

I can't find it Tokina website yet.


16-28 mm F2.8 Tokina lens http://www.personal-view.com/talks/discussion/6415/16-28-mm-f2.8-tokina-lens Sun, 17 Mar 2013 04:52:02 -0600 Vitaliy_Kiselev 6415@/talks/discussions image


  • Aperture - Max f/2.8, Min f/22
  • Angle of View - 107° - 76°
  • Minimum Focus Distance - 11" (27.94 cm)
  • Magnification - 0.19x
  • Maximum Reproduction Ratio -1:5.26
  • 13 Groups, 15 Elements
  • Dimensions - 3.54 x 5.25" (8.99 x 13.34 cm)
  • Weight - 2.09 lb (950 g)

Available at:


18-105mm F4 PZ OSS E lens http://www.personal-view.com/talks/discussion/10195/18-105mm-f4-pz-oss-e-lens Sat, 19 Apr 2014 03:39:38 -0600 Vitaliy_Kiselev 10195@/talks/discussions image




SLR Magic 2x ANAMORPHIC lens http://www.personal-view.com/talks/discussion/4466/slr-magic-2x-anamorphic-lens Tue, 04 Sep 2012 15:35:25 -0600 slrmagic 4466@/talks/discussions Dear All,

We have received 4 email requests from members of this forum on the possibility of designing an Anamorphic lens. We had this thought for the past year and did a lot of research. There is one common request which is to have horizontal flares. The others requests did not have any common grounds. We came up with an idea for a 25mm f/3.2 1.35x or 35mm f/3.2 1.35x Anamorphic lens for micro four thirds. Shooting at 16:9 would give a 2.40:1 anamorphic output. Just before we decided to go ahead with the project we had a second thought. 2 Years ago we asked openly on dpreview.com forum for what photographers wanted and the general consensus was our SLR Magic HyperPrime 12mm T1.6 lens.


It did not fulfill the needs and wants of everyone but we made what most people agreed on by means of a discussion. It ended up being a popular lens that we still are having problems meeting demand and we think it had a big part to do with asking photographers. If we did not ask around we probably made a 12mm f/2.8 lens. As it turned out quite well last time we want to make our next lens an open discussion again.

Here are some of the possible options we received and please feel free to throw in extra ideas. I hope people experienced with shooting in Anamorphic can also throw in ideas.

Anamorphic Adapter (1.33x, 1.5x, 1.75x, 2x) Dedicated mFT Anamorphic adapter for reasonable size Anamorphic adapter compatible with FF lenses 50mm f/2.8 Anamorphic lens (FF, APS-C, or mFT) Expected MSRP (Sad fact but it as direct correlation to IQ)

Kind rgds., SLR Magic Team

P.S. We will be at Photokina 2012 and would like to welcome any cinematographers with Anamorphic lens ideas to drop by our booth for idea exchange! We will be in Hall 3.1 B059

Mitakon VS JR Speed Boosters http://www.personal-view.com/talks/discussion/13677/mitakon-vs-jr-speed-boosters Tue, 08 Sep 2015 08:45:12 -0600 mat27k 13677@/talks/discussions Hi guys, i'm a GH4 owner. I read both threads about Mitakon and RJ speed booster but i still can't decide which one is better.

It seems both suffer of blue dot. It seems Mitakon is sharper in the center and blurrer in the corners but RJ is less sharper than Mita in the center but it is more sharp in the overall. I read Mitakon has some color issues Mitakon is a bit more expensive than JR and built quality seems to be better than JR. I'm also worried because Mitakon has another Speed booster in the second version of the product and EF-MFT speedbooster is just in the first version. Should I wait? How much better is the second version compared with the first one?

I'm quite confused about this two Speed Boosters. I'm going to use it mainly with a Kiron Kino Precision 28mm f2 and a Helios 44-2 58mm f2

Please, could you give me your impressions and final thoughts about this two lenses?

Thanks in advance

85mm F1.4 Zeiss Otus lens, $4500 only http://www.personal-view.com/talks/discussion/11202/85mm-f1.4-zeiss-otus-lens-4500-only Fri, 05 Sep 2014 12:10:10 -0600 Vitaliy_Kiselev 11202@/talks/discussions image



  • Focal length - 85 mm
  • Aperture - F1.4 – F16
  • Focusing range = 0,8m – ∞
  • 11 elements in 9 groups
  • Filter thread - M86 x 1.00
  • Dimensions (with caps) ZF.2: 138 mm (5.43‘‘)
  • Weight ZF.2: 1140g ZE: 1200g
  • Camera mounts - F Mount (ZF.2) and EF Mount (ZE)

The Otus 1.4/85 will be available worldwide with the F-mount (ZF.2) or EF-mount (ZE) from mid-September. The expected recommended retail price is €3,360.50* or US$ 4,490* (excl. VAT).

Available at

Ciecio7 PL to MFT Adapter w/ Support Bracket - $125 + Shipping http://www.personal-view.com/talks/discussion/13665/ciecio7-pl-to-mft-adapter-w-support-bracket-125-shipping Sun, 06 Sep 2015 23:23:49 -0600 InnerSpark 13665@/talks/discussions Practically giving this away now, but I've moved onto other platforms and don't use MFT anymore.

PL to MFT adapter from the very well known Ciecio7 eBay seller.

It costs $320 new, I'm just asking for $125 and shipping. It is shimmable and has the absolutely necessary support bracket.. Put that 2x Anamorphic or cine glass on that Gh4!

Please PM or email me at innersparkfilms@gmail.com if you're interested or have any questions!


Kowa m43 cine lenses lineup http://www.personal-view.com/talks/discussion/8767/kowa-m43-cine-lenses-lineup- Wed, 13 Nov 2013 10:22:52 -0700 astraban 8767@/talks/discussions image

Some good news for the format (including an 8,5 mm f/2.8)

14-150mm F3.5-5.8 Di III Tamron m43 zoom lens http://www.personal-view.com/talks/discussion/5941/14-150mm-f3.5-5.8-di-iii-tamron-m43-zoom-lens Tue, 29 Jan 2013 04:40:50 -0700 Vitaliy_Kiselev 5941@/talks/discussions image


  • Focal length - 14-150mm (equivalent to 28-300mm in the 35mm/full-frame format)
  • Maximum aperture - F/3.5-5.8
  • Lens construction - 17 elements in 13 groups
  • Minimum focus distance - 0.5m (19.7 in.)
  • Maximum magnification ratio - 1:3.8 (at f=150mm: MFD 0.5m)
  • Filter size - φ52mm
  • Length - 80.4mm (3.2 in.)
  • Entire Length - 85.24mm (3.4 in.)
  • Diameter - φ63mm
  • Weight - 280g (9.9 oz.)
  • No. of diaphragm blades - 7 (Circular diaphragm)
  • Minimum aperture - F/22
  • Flower-shaped lens hood included
  • m43 mount

Available at:

Looking for a cheap m4/3 low light Lens with autofocus http://www.personal-view.com/talks/discussion/13523/looking-for-a-cheap-m43-low-light-lens-with-autofocus Mon, 10 Aug 2015 11:25:10 -0600 felixgarbe 13523@/talks/discussions Hello, i want to buy another Lens for low light conditions for my Lumix GF3. Currently i have the standard "Panasonic 14 - 42 mm / F 3,5 - 5,6 " I know there is the "Panasonic 20 mm / F 1,7 Pancake" but its quite expensive (~250€ on ebay) , so i wonder if there is any cheaper alternative? I think it can also be another connector (with m4/3 adapter) as long as the autofocus works. Thank you!

Cooke anamorphic http://www.personal-view.com/talks/discussion/12567/cooke-anamorphic Wed, 11 Mar 2015 16:46:06 -0600 RRRR 12567@/talks/discussions Hey! Long time no see, been swamped in work - I thought I'd check in with some information that might be of interest as we shot a short last week on some wonderful new Cooke anamorphics. They took a huge chunk of the tech budget, however in the light of things I felt it was really worth it. Now, some purists say these and the Arri / Zeiss anamorphics are too clinical for their preference. In my opinion they are just right for keeping a safe production workflow when you can't always adapt the way you shoot to "the ideal" or when you have to adapt the way you shoot to what you shoot.

Let me recap. We shot the short on an fs700 coupled to an Odyssey 7q+. Wonderful, powerful couple, even if I'm not the biggest fan of Sony colors. I decided to stick between 2000 iso and 6400 iso for night shots, as we didn't have the budget for a lot of lighting equipment. 6400 iso noise is a bit bad, but workable. At most I could augment and mold natural light. We decided pretty early on that Anamorphic lenses would add a cinematic twist but also contribute to a sense of realism / immersion we were after in the production. Now, these new and very expensive anamorphics are sharp enough / corrected enough to be shot wide open and the mechanics are obviously top notch, making them as functional as any high quality spherical lens. Another things is; the short was shot almost entirely hand-held and when it comes to anamorphics, that can really skew things up badly if an adapter is only slightly off axis f.i.. I was a bit worried during the first day of shooting, as we didn't have a working live-grade setup for correcting the footage, however, I did not need to. These are perfectly corrected to not skew things up in a bad way, no matter how you shoot.

We ended up with the Cookes as the Arri/Zeiss ones had been booked by someone else, but they did not dissapoint one bit. After checking some tests online I chose the 40 and 75 as the former looked to have less CA / have better correction than the wider 32, while the 75 had some CA but allowed for different framing (The Arri Zeiss ones seem to be pretty identical, but the Cookes have some differences in-between them) and differences in distance emphasis, depending on location space. The lenses are massive, over 2 kg's, and I had to put together pieces from 2 different rigs to make it work, all in all we ended up with setup weighing in at around 10 kg's. After that, however, we hardly had to think any differently, though at the end of the shoot my eyes seemed to want to squeeze reality into 2x.

The bottom line, having lenses of this quality in the production allowed us to use anamorphics in the first place, to get a clear anamorphic look without the potential caveats of working with them, never taking time from the shoot. For a more extreme look, well, you may have that option with a bigger budget but then again, it's always possible to push things in the grade. (in doing both I retain control)

The lenses can be used at 2.3T (with sufficient sharpness), though I prefered to stay at 2.8 for most night exteriors. I'll add some sample frames here shortly, and update when I get into pregrade. If there are any surprises, I'll let you know.

Video-Friendly Lenses for Lumix DSLRs http://www.personal-view.com/talks/discussion/859/video-friendly-lenses-for-lumix-dslrs Mon, 05 Sep 2011 14:46:59 -0600 LPowell 859@/talks/discussions

* Stabilization and control of camera movement
* Matte box shading of camera lens
* Direct, tactile control of lens aperture
* Follow focus control of lens focus

Lenses that adapt well to these requirements will possess a combination of subtle features that are often omitted from manufacturers' data sheets and overlooked in published reviews. While vintage lenses provide full manual controls, their compact, old-school design often makes them unsuitable for use on a rig. At the other extreme, modern trends in auto-focus lens design have eliminated a number of manual lens features that remain essential to videographers. In many cases, the most usable lenses for video come from early generations of auto-focus lenses that combined vintage manual controls with modern lens design.

Here's my list of features that make a lens video-friendly:

* Manual aperture ring
* Direct-coupled focus ring
* Proper focus ring rotation
* Non-rotating outer barrel (internal focus)
* Non-extending outer barrel (internal zoom/focus)
* Constant field of view
* Constant f-stop aperture
* Rotational zoom ring

While few lenses possess all the above features, a good video lens will make up for any deficiencies with solid performance in other aspects.

* Manual aperture ring

Lenses that lack a manual aperture ring are problematic for video.

Vintage manual-focus lenses all have manual aperture rings, and most can be set to an auto-iris mode for in-camera control of aperture in shutter-priority mode. Many auto-focus lenses have eliminated the manual aperture ring, relying entirely on camera controls to set aperture in manual mode. This includes all Lumix, Zuiko Digital, Canon EOS, and Nikon G-type auto-focus lenses, as well as most currently manufactured lenses by Tokina, Tamron, and Sigma.

* Direct-coupled focus ring

Lenses with an electronic focus ring are problematic for video.

While all auto-focus lenses can be manually focused, not all of them are truly manual. The focus rings on Lumix, Zuiko Digital, and many Sigma HSM lenses are not directly coupled to the lens' internal focusing mechanisms. As a result, their focus rings continue to rotate uselessly beyond max and min focus limits. Lenses like this cannot be used on rigs with follow focus attachments, since focus ring position is completely uncalibrated.

* Proper focus ring rotation

Lenses with contrary focus ring rotation are problematic for video.

When mounted on a rig with a follow focus attachment, the focus ring rotation of the lens will determine the rotation direction of the follow focus wheel. Regardless of which side of the lens the FF wheel is mounted on, it's important that focus-pulling direction be consistent among all lenses used on the rig.

With Lumix, Zuiko, EOS, and Sigma lenses, infinity focus is at the counter-clockwise end of focus ring rotation. With Nikon and Pentax lenses, infinity focus is at the clockwise end of focus ring rotation. Tokina, Tamron, and Samyang/Rokinon lenses are usually built with the appropriate focus ring rotation for each type of lens mount. Sigma lenses, however, always rotate in the Lumix direction, regardless of the lens mount. For follow focus use, I prefer lenses that rotate in the Nikon direction because it pulls focus closer as I rotate the FF wheel toward me.

* Non-extending outer barrel

Lenses with an extending outer barrel are problematic for video.

Most zoom lenses, both manual and auto-focus, are designed with outer lens barrels that extend when the lens is zoomed and/or focused. While the barrels on most vintage prime lenses do not rotate, they usually extend when focused. A lens whose length changes can be awkward to use on a rig with a matte box.

* Non-rotating outer barrel

Lenses with a rotating outer barrel are problematic for video.

Most vintage zoom lenses are built with the focus ring on the outer lens barrel. This causes any attached lens filter to rotate as the lens is focused, making these lenses unsuitable for use with polarizer and anamorphic attachments. Most modern auto-focus lenses use internal focusing mechanisms that avoid these issues.

* Constant field of view

Lenses that breathe noticeably while focusing are problematic for video.

The focal length of almost all lenses will change slightly as the lens is focused. This effect, known as "lens breathing", alters the framing of a shot when pulling focus, making the lens appear to zoom as well as shift focus. This can ruin a shot if it is noticeable enough to be distracting.

* Constant f-stop aperture

Lenses with variable f-stops are problematic for video.

On many zoom lenses, the actual aperture will vary when the lens is set at its widest f-stops. This will cause zooming at wide f-stops to visibly affect exposure settings, which can ruin a video clip.

* Rotational zoom ring

Lenses with push-pull zoom rings are problematic for video.

Virtually all modern zoom lenses use individual focus and zoom rings. Many vintage zoom lenses were designed with a combined zoom/focus ring which zooms by sliding along the length of the lens barrel. Lenses like this are usually impractical to use on rigs with follow focus attachments.

In the next post I've reviewed a list of video-friendly manual-focus lenses that I've found well-suited for use with Lumix DSLRs. In addition, you can find a list of auto-focus zoom lenses for Lumix DSLRs at the following link:

25mm f1.4 Leica DG Summilux http://www.personal-view.com/talks/discussion/712/25mm-f1.4-leica-dg-summilux- Fri, 19 Aug 2011 16:04:25 -0600 Mimirsan 712@/talks/discussions

Available at:



I sold my 20mm and gots me one of these babies a few days back (first batch in UK) for a really good price (under £400 early display copy no box or pouch but got the hood!).
Also owning a Voigtlander 25mm 0.95 & Voigt 35mm f1.4 Id thought I would share my personal thoughts in comparison.
Well to start...The lens is good....damn good.
Sharp even at F1.4 Detail and rendition of colour is beautiful.
AF is very fast and accurate on my GH2 not so fast on my GF1...but still faster than the 20mm f1.7
Very controlled image...by this I mean it has very little CA and no flares

But heres the Cons
Price...I was lucky to get this cheap but general UK retail is near £560!...that im sorry is ludicrous...It has astounding optics and yeah okay f1.4 with fast accurate AF is probably why but no!
Why? Build...Plastic! (albeit harder plastic than other Panny lenses)
The voigts FEELS expensive (heck even my Super Tak 50mm f1.4 feels more expensive) you know its crafted...but the Leica? Just off the mass produced factory line...for that price we deserve SOLID BUILD!

Lacks the ability for creativity because of its very controlled image...by this I mean its lacking character...much like the 20mm f1.7.
You can have more creative image with the Voigt.
Focus ring for MF...I just dont like it...theres no give...its just silly smooth so hard to be pinpoint accurate. The Voigt has very nice dampened focus ring and can be accurate even at f0.95

I would say if it was cheaper then get one as it is really superb...but as the price is very close to the voigt 25mm f0.95 I would say get that if you can live without the AF as it gives more stops of light and feels like you bought something that justifies the cost.
Is it better than the 20mm?....absolutely without question BUT if you have the 20mm and cant afford the Leica...dont lose sleep over it.

Anyway I leave this with a quick snapshot of my little girl taken with the Leica & GF1 (both at f1.4 in jpg right out of camera no post)...I was amazed by the detail even on a ye olde GF1 so can give you a idea of the quality.