Paolo.Battista Posted August 27, 2010 Share #1 Posted August 27, 2010 Advertisement (gone after registration) Have you seen this announce? Is Cosina trying to develop an alternative rangefinder platform based on micro4/3 standard? Do you think it could be interesting having a micro4/3 real rangefinder with an EVF as an optional ? Paolo Quote Link to post Share on other sites More sharing options...
Advertisement Posted August 27, 2010 Posted August 27, 2010 Hi Paolo.Battista, Take a look here Voigtlander Nocton 25 f:0,95 for micro4/3. I'm sure you'll find what you were looking for!
01af Posted August 27, 2010 Share #2 Posted August 27, 2010 Have you seen this announce? Yes, sure. Wonder how it will perform at full aperture, compared to the Noctilux-M 50 mm Asph. Is Cosina trying to develop an alternative rangefinder platform based on micro4/3 standard? 1. How are we supposed to how? 2. Why would the announcement of that lens bring you to this idea in the first place? It's just a new lens for the Micro-4/3 standard, that's all. Of course it would be a nice move to introduce a new µ-4/3 camera with a real high-precision mechanical rangefinder ... however I'm afraid development and manufacture would be too expensive be be economical. So I guess it won't happen. Quote Link to post Share on other sites More sharing options...
giordano Posted August 27, 2010 Share #3 Posted August 27, 2010 O1af and Paolo, I can't find anything about this lens on the internet. Would you mind posting a link? Or are you referring to the not-Voigtlander 50mm f/0.95 "Noctor" in (manual) M4/3 mount, which was discussed here months ago: http://www.l-camera-forum.com/leica-forum/digital-forum/118748-new-nocton-50mm-f0-95-a.html#post1260676 ? Quote Link to post Share on other sites More sharing options...
250swb Posted August 27, 2010 Share #4 Posted August 27, 2010 Its on Cosina's web site http://www.cosina.co.jp/seihin/voigt/v-lens/micro-ft/index.html Steve 1 Quote Link to post Share on other sites More sharing options...
MPerson Posted August 28, 2010 Share #5 Posted August 28, 2010 .... and here. Quote Link to post Share on other sites More sharing options...
SJP Posted August 28, 2010 Share #6 Posted August 28, 2010 Interesting in terms of light gathering capacity but with 4/3 the DOF is similar to a f/1.9 lens, although it will allow considerable 3D isolation. Another concern would be lack or presence of distortion abberations etc. Quote Link to post Share on other sites More sharing options...
01af Posted August 28, 2010 Share #7 Posted August 28, 2010 (edited) Advertisement (gone after registration) ... but with 4/3 the DOF is similar to a f/1.9 lens ... Actually, with 4/3 format, depth-of-field will be precisely that of an f/0.95 lens. Edited August 28, 2010 by 01af Quote Link to post Share on other sites More sharing options...
leicanut2 Posted August 29, 2010 Share #8 Posted August 29, 2010 Steve Huff did a review of this lens. Jan Quote Link to post Share on other sites More sharing options...
01af Posted August 30, 2010 Share #9 Posted August 30, 2010 Steve Huff did a review of this lens. He didn't. Quote Link to post Share on other sites More sharing options...
SJP Posted August 30, 2010 Share #10 Posted August 30, 2010 Actually, with 4/3 format, depth-of-field will be precisely that of an f/0.95 lens. AFAIK 4/3 has a crop factor of 2 so then the depth of field is larger than on a FF sensor giving an "equivalent aperture" of 2x 0.95 = 1.9 (this is the "form follows format" relation described by Peter Karbe, which is a slight simplification - but usually considered good enough as a rule of thumb). It remains f/0.95 in terms of light gathering capacity obviously. Anyway there is no point in rehashing this point further as it has been discussed at length (to death) in previous discussions - see here. Quote Link to post Share on other sites More sharing options...
01af Posted August 30, 2010 Share #11 Posted August 30, 2010 ... giving an "equivalent aperture" of 2 × 0.95 = 1.9 ... My point is this: An aperture of f/0.95 on 4/3 format is not equivalent to f/1.9. Instead, it is equivalent in terms of DOF to f/1.9 on 35-mm full-frame format. And please don't think that's just splitting hairs. It's not. Quote Link to post Share on other sites More sharing options...
lct Posted August 30, 2010 Share #12 Posted August 30, 2010 A 25/0.95 lens on a 4/3 camera has (more or less) the same DoF as a 50/1.9 (not 25/1.9) lens on a 24x36 camera. Quote Link to post Share on other sites More sharing options...
leicanut2 Posted August 30, 2010 Share #13 Posted August 30, 2010 (edited) He didn't. My mistake his review was for the 50mm Nocton, sorry. Edited August 30, 2010 by leicanut2 correction Quote Link to post Share on other sites More sharing options...
01af Posted August 30, 2010 Share #14 Posted August 30, 2010 My mistake this is a 50 ... And it is no Voigtländer lens; instead, it's an obscure brand named 'Noktor' ... which most likely has been deliberately chosen for the purpose of being confused with Voigtländer's product name 'Nokton'. Quote Link to post Share on other sites More sharing options...
bill Posted August 30, 2010 Share #15 Posted August 30, 2010 It is clearly shown as a Voigtlander Nokton in the pictures. Quote Link to post Share on other sites More sharing options...
leicanut2 Posted August 30, 2010 Share #16 Posted August 30, 2010 I never noticed that your right. Quote Link to post Share on other sites More sharing options...
01af Posted August 30, 2010 Share #17 Posted August 30, 2010 It is clearly shown as a Voigtlander Nokton in the pictures. Bill, we are talking about Steve Huff's Noktor 50 mm review ... Quote Link to post Share on other sites More sharing options...
bill Posted August 30, 2010 Share #18 Posted August 30, 2010 Don't you ellipsise at me... Quote Link to post Share on other sites More sharing options...
leicanut2 Posted August 30, 2010 Share #19 Posted August 30, 2010 Must elucidate so us simple folks understand. Jan Quote Link to post Share on other sites More sharing options...
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