The German company Ibe Optics announced a new 26mmf /1.4 lens. You can download the Lens – Datasheet, German (2347kB) to read more about the specs. And yes, this is the same company that created the Ibelux 40mm f/0.85 lens with Kenko.
Source: ibe-optics.com
32 Responses
Is that a C-Mount lens?
It appears to have a M40x0.75 screw mount and image circle of 22mm. Four-thirds sensor diameter is 22.5mm, so it will have some clipping. C-mount is 1″ 32 tpi.
The “textured ring nearest the mount” is the thread for mounting. I think it’s for fixed-focus applications, where a locking ring will keep the lens focused on the desired distance. Probably optimized for close-up, given the 14mm depth of the thread. It is, after all, listed under “machine vision”. Flange distance is not listed.
To be used on a µ43 camera, it will need a mount adapter, diaphragm, and helicoid.
Flange distance from the rear end is 20mm, close to µ43, but the thread ends 25mm from the sensor plane.
Four Thirds sensor diameter is 21.6 mm, not 22.5 mm.
That is true for 2:3 aspect ratio (12×18). For 3:4 aspect ratio, the sensor is 13.5×18. It is slightly taller than what would be half-and-half of full frame.
Where do you take these numbers from? Everywhere I look it says the Four Thirds Sensor is 17.3 mm x 13.0 mm. Which is 4:3, obviously, and makes for a 21.6 mm diagonal. This is no different with the GH1 and GH2’s multi-aspect sensors when they are read out for 4:3 aspect ratio. And when it’s a different ratio, the required image circle size doesn’t change either – that’s the whole point of a multi-aspect-ratio sensor: the diagonal is always the same regardless of whether you record 4:3, 3:2 or 16:9 and so is the resolution.
>Where do you take these numbers from?
You know, that’s a good question, ’cause looks like you are right. Thanks for correcting that.
According to Wikipedia, 13.5 x 18 is the sensor size, and 13 x 17.3 is the imaging area. I must have gotten them mixed up at some point. Strange, because I remember now looking at that 13 and trying to calculate 13*4/3 in my head not too long ago.
Learn something new every day! Yay! 🙂
I wasn’t the only one. A quick Google search found several references to 13.5×18, including at (gasp!) dpreview.com.
http://www.dpreview.com/reviews/panasonicdmcg1
http://www.uwphotographyguide.com/mirrorless-cameras
http://forums.dpreview.com/forums/post/31494127
http://www.fourthirdsphoto.com/f2/olympus-e-p2-hacks-updated-july-6-2010-a-57674.html
http://www.anandtech.com/show/2618/2
Hmmm…
I suppose 18 mm x 13.5 mm is true for the overall area of the larger sensors in the GH1 and GH2, but other models don’t have this, which is why they are always 17.3 mm x 13.0 mm.
The GH2 specs say “17.3 x 13.0 mm (in 4:3 aspect ratio)”: http://panasonic.net/avc/lumix/systemcamera/gms/gh2/specifications.html So that tells people that the size will be different for other aspect ratios, which makes sense.
And then I started a quick search for the full size of the GH1/GH2 sensors and found this: http://forums.dpreview.com/forums/post/36396593 The measurements are pretty close to 18 mm x 13.5 mm, so that explains why dpreview and other sites stated this sensor size.
And also this, which focuses a little more on the aspect that the diagonal always stays the same when a multi-aspect sensor is used: http://www.dvxuser.com/V6/showthread.php?293830-GH3-GH2-multi-aspect-ratio-sensor-explanation
Ya, great! Now let see them make autofocus lens. Same for Jacker, Voightlander, etc etc…
This lens likely to compete with the current Leica Summilux ?
Good , now everyone got option to go with .
But I still wonder if this is a sharp lens in the Summilux’s standard .
Good to see all the third-party support for the Micro Four Thirds system. The more, the merrier. Hope this helps prove m43 is the mirrorless system that’s here to stay.
If this lens really is intended for Micro Four Thirds, it seems to be an unusually Spartan design: No focusing ring? No aperture control? No mounting flange??
My German isn’t much, but the banner down the side of the datasheet appears to read “Industrial Lens for Large Sensors,” so my guess is that this is an off-the-shelf item that they may offer with some kind of adapter for mounting on MFT cameras.
looks unusually long
That’s what she said.
+1
Not too long. 68 mm long, 43 mm wide. 200 g. You’ll need M-adapter too. It is not m43 lens.
M40, sorry.
Looks like c-mount. It is very long so that fits more with security camera applications, and one source mentioned “near infrared capabilities”, another tell-take sign…
It’s not a lens…it’s a loupe for viewing 35mm transparencies…… 🙂
Any word on Price?
@Ranger 9… It appears that the focus ring is the textured ring nearest the mount. My guess is that it’s an auto-focus lens, since there appears to be no aperture ring or distance scale.
Whatever it ends up being, it’s great to see more companies making M4/3 lenses!
Me, I’ll stick with Voigtländer lenses.
Lacking an aperture ring doesn’t mean that the lens has AF, see the Voigtländer lenses with EF-mount.
Anyway it really seems to be rather an idustrial than a photographic lense – we will see.
just another CCTV maker. not really existed news anyway. Besides, Jacker is just a Trader too. The so called 36mm F1.8 is actually an inexpensive (US$12) China CCTV Fujian 37mm F1.7.
I don’t really think more TV lens would help to improve the lens profile of M43. in fact, the lens for M43 are really good. and could be even more complete with next 12 months.
The example photo is an industrial lens, [fixed focus, fixed aperture] not a photographer’s lens. That doesn’t mean it couldn’t be adapted to such a use, but it would need a practical housing for such a retail product. The interesting aspect is the glass, 26mm f/1.4 … hopefully SLR Magic or similar grabs onto this and comes out with a nice photo variation!
It’ also listed as 400-1000nm coated lens which is infrared/near infrared wave-lengths, this is a lens to look at parts in an assembly line for QC and purposes like that. So the optics as listed aren’t really of general use.
This is a lens for special applications. Fixed focus at 296mm and 1:0.12 magnification. If your normal photography is about stamps this might work…
296mm is the minimum focus distance (MFD), I cannot believe that the focus is fixed there
It also says: ” Fokus ändert sich über Wellenlängenbereich”
Translation: “Focus changes over wavelength coverage”
Translation for photogs: strong longitudinal CA
It looks like a completely useless lens for the basic photographer…
This is a typical lens for security or industrial applications. No focus ring (done with adapter to camera, of course no AF!) and no variable aperture (fixed 1,4). So it is maybe something to play with, but nothing really usable in the real world of a photographer.
But as said before, it is good to see other lenses, every step to get a bigger market is a step forward.
9 elements in 7 groups, just like the Panasonic 25mm f1.4. This must be pretty good optically. Good to see new manufacturers releasing lenses for MFT!
german short description says: it’s optimized for short distances.
Lens for industry, specially for IR cameras, monitoring, night vision, ect. Not for Panasonic and Olympus bodies.