I think, it was kind of luck to find one of these Fujinon lenses for this price. Thanks for the comments on my pictures! ages ago (permalink)

Well here's a 13mm, and example photos. It vignettes a lot. Canon. Originally posted ages ago. (permalink) eljustinoid edited this topic ages ago.

News and Comment · Polarization detection in miniature · Innovative CQD detector for broadband multispectral imaging · Ultra-fast light-field microscopy with ...

Hi! Lenses of 12mm were compared in my blog. blogs.yahoo.co.jp/ktf_turbo/21864857.html ages ago (permalink)

The special formulation of an AR coating is applied to both sides of the lens in order to dramatically lessen the quantity of glare that bounces off your lenses ...

I don't think I'm going to go through with the CF12.5A modification. I've disassembled, reassembled, but I can't bring myself to grind it. As maxnk expressed, I rather like the minor vignetting it provides (comparable to many 25mm cine c-mount coverage in 4:3 format)... and the modification will likely result in more chromatic abberation, corner softness all for 'fuller' sensor coverage. The vignetting is not so bad to begin. Eljustinoid, I love your photos in the 'one lens per post' thread in the 'alternative/legacy lens on m4/3' forum'. It's great to have you here as well. You're doing great work! ages ago (permalink)

ScienceExperiment Kit

Of course, there's always the option of using a wide converter. ages ago (permalink)

Thank you all. Maxnk, those are informative. I have tried my 0.25x, opteka fisheye on a nikon f-mount 50mm. I will post the results later but i am not thrilled. if I find one for ~20 euros, I would get the fujinon. ages ago (permalink)

cgi.ebay.com/3-COMPUTAR-APC-TV-LENSES-12-5MM-1-1-3-plus-8... Is this the computar lens? Originally posted ages ago. (permalink) ulugeyik edited this topic ages ago.

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Scienceexperiment kitpdf

Yep, that's the one... love the 'racing clouds' photo, maxnk. ages ago (permalink)

For some impressions made with the Fujinon 12.5mm f/1.4 click there: btw: I got mine for 20€ at a second-hand dealer.. ages ago (permalink)

Science kits for 12 Year olds

The Computar 12.5mm/1.3s in that auction are auto-iris, and possibly even CS-mount. ages ago (permalink)

4K Security cameras are the highest resolution IP cameras in the CCTV industry. 8MP 4K cameras with video analytics make the best 4K ...

Here's the manual focus/manual iris C-mount Computar 12.5/1.3: cgi.ebay.de/COMPUTAR-TV-Lens-1-1-3-12-5mm-man-iris-2-3-Zo.... Nice price. I purchased a couple from this seller just the other day. ages ago (permalink)

Science kits for 5 year olds

The parameter is calculated from the number of peaks divided by the projected area. Arithmetic mean peak curvature (Spc). Spc indicates the mean principle ...

For a thin double convex lens, refraction acts to focus all parallel rays to a point referred to as the principal focal point. The distance from the lens to ...

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Hi, Sometimes I crave for a cheap "wide-angle" lens for my EP2. I have just seen this announcement: www.43rumors.com/slrmagic-lens-update-with-new-12mm-fast-... I do not particularly like what SLRMagic is doing with these lenses which appear to be adaptations of existing c-mount lenses but the mention Avenir CCTV lens seems interesting. I realize it won't provide a full coverage and I will end up with some vignetting. If I accept to live with that, how much of the FOV am I losing? does anyone have sample shots to share? Any favorite 12mm C-mount lenses? 2:57AM, 29 December 2010 PST (permalink)

30 suppliers for ball lenses are listed in the RP Photonics Buyer's Guide, out of which 5 present their product descriptions.

Coma aberration occurs when parallel rays entering the lens at a certain angle are brought to focus at different positions, depending on their distance from the ...

A non-polarizing beamsplitter is an optical device to split a light beam into two beams. Cubes are made form a pair of precision high tolerance right angle ...

Rca In-Line Ethernet Coupler (cat 5e) ... This website uses third party advertising cookies to serve you relevant ads. You may opt-out from these third party ad ...

i received a fujinon 12.5mm, but of course my adapter couldn't focus to infinity... i ordered the same adapter as maxnk has spoken of in his posts. i also ordered the fujian 35mm and just received it. the adapter works with my fujinon (needs a shim to get it exact). how random??? anyway here's the link for the 35mm(its cheap enough to just get it for the adapter) cgi.ebay.com/35mm-f-1-7-CCTV-Lens-C-Mount-Mirco-Ring-EP1-... ages ago (permalink)

Science kits for 7 year olds

I found one for £9.99 on eBay several months ago. I don't know how many of us are really looking for them, considering they need machining and other modifications. The other I purchased from eBay seller 'Calkovskycamerasandlensesco' for $99. The £9.99 one is in better shape. The one Calkovsky sold me has 'schneideritis', I tried to trade it for another and he told me he sold out. He's all 'praise Jesus' but he failed to mention the schneideritis (which DOES cause lower contrast, despite what Calkovsky, Schneider or any other so-called 'experts' may claim). I've been following zcream's attempts, and I don't think he'll have much joy beyond the Fujinon CF12.5A, unless he happens to find a Weinberger 8mm which is rare as rocking horse turds. ages ago (permalink)

I suspect they'll have significant vignetting, but any new lens in the wide range is much needed and much welcomed. I have a couple of the Fujinon-TV CF12.5A (1.4/12.5mm), which I believe provide the best coverage of the m4/3 sensor among the 12mm lenses. I've been intending to make this modification to one of them: www.forums.getdpi.com/forum/showthread.php?p=274374 I've just put it on hold because I'm looking for an engineer to machine a couple items (specifically the outer hood needs to be re-constructed), and I've been enjoying the un-modified one. I also have the Cosmicar 12.5mm/1.3, which is also great but has a bit more vignetting than the Fujinon. ages ago (permalink)

Science kits for 10 year olds

Jul 3, 2011 — The "mm notation" is the focal length. Note that when computing the zoom ratio (e.g. 3x, 5x) the units cancel so you can quote the focal length ...

It looked weird to me that is indeed why I asked. Thanks for the pointer and correction! ages ago (permalink)

@ ktf_design : Cool ! Did you cropped the pictures or they're full frame? ages ago (permalink)

I like the little Computar 12.5/1.3. After removing the stop screw, it reaches infinity and is quite nice. I just tried it with a Nikon x.68 wide angle converter. That increases the angle a little bit but after cropping out the picture to remove vignetting, the effect is minimal. BTW, I tried the same with a Cine Nikkor 10/1.6, similar results and very heavy vignetting. The Canon shown above is nice for its handling IMHO. I also have a Cosmicar TV 12.5/1.4 but I think that one is the weakest reg. IQ. I would love to see a comparison between the Computar and the Fujinon. Other than that, I think the quest continues... Stefan ages ago (permalink)

Thanks. As far as I can see, the Fujinon price is order of ~$200 in some places! I guess it is a hot item. Let me fiddle around a bit more to see if I can find something I want to try. Here is interesting list: forum.getdpi.com/forum/showthread.php?t=17470 ages ago (permalink)