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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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 Posted: Mon Mar 09, 2015 5:03 pm Post subject: Computar f1.2 6mm on Pentax Q7 |
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iangreenhalgh1 wrote:
Tiny lens that cost me 4ukp. It's for a 1/2" sensor but luckily covers the Q7's 1/1.7" sensor with only the tiniest bit of vignette. Sharpness, contrast and lack of distortion are all great. This is roughly equivalent to a 28mm lens of 35mm fullframe.
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tromboads
Joined: 29 May 2012
Posts: 1655
Location: Melbourne AU
Expire: 2015-10-01
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| Posted: Mon Mar 09, 2015 11:46 pm Post subject: |
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tromboads wrote:
Hey that's good to know. I've been half looking for a wider FOV for my little Q. |
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Tue Mar 10, 2015 1:18 am Post subject: |
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iangreenhalgh1 wrote:
I've got a 4mm Computar with the same IQ as this but it doesn't cover the Q7 sensor. Should be fine on the Q though. It was CS mount but I adapted it to Q by drilling out a D mount adapter. It was a electronic iris but I converted it to a fixed iris by removing the electronics and iris mechanism and adding a fixed stop made from a disk of black paper. Not sure what the aperture is now, probably around f2.8
That's the coverage on the Q7 sensor, should be okay on the Q. If you'd like it, you can have it for the postage cost.
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blotafton
Joined: 08 Aug 2013
Posts: 1633
Location: Sweden
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| Posted: Tue Mar 10, 2015 1:25 am Post subject: |
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blotafton wrote:
Looks good!
I have a feeling small sensor interchangeable lens cameras has good future. Probably smart to stock up on those tiny, interesting lenses! |
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Tue Mar 10, 2015 1:28 am Post subject: |
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iangreenhalgh1 wrote:
Yes, smaller sensor ICs do have a future, I'm sure.
However, we're a bit late to stock up on suitable lenses cheap, the ebay prices today are often 10x what they were a couple of years ago. Bargains can still be had, but most sellers now are asking high prices.
The Japanese brands like Fujinon, Computar (Kowa) and Cosmicar (Ricoh Pentax) are still affordable but the European brands like Zeiss Jena (especially Tevidons), TT&H/Cooke, Dallmeyer, Kern, SOM Berthiot, Angenieux, Meopta and Schneider have gone through the roof.
It's due to the video shooters using them on the Lumix GH series in ETC mode or on the new Black Magic Pocket camera.
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Tue Mar 10, 2015 1:47 am Post subject: |
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Attila wrote:
 finally a nice find congrats!!
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Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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blotafton
Joined: 08 Aug 2013
Posts: 1633
Location: Sweden
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| Posted: Tue Mar 10, 2015 1:50 am Post subject: |
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blotafton wrote:
It's too bad I'm so late in the game haha!
I saw a nice looking kit of cine ektar's and was prepared to buy but that auction really took speed.
It was 15mm, 25mm and 63mm. Really clean and good looking lenses. |
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Tue Mar 10, 2015 1:57 am Post subject: |
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iangreenhalgh1 wrote:
Cheers. I have a 3.6mm Computar to try next, fingers crossed it's as nice as this 6mm and the 8.5mm.
Computars and Cosmicars are still cheap if you look, a good place is to look at auctions of cctv cameras and look what lens is on the front. Avoid electronic iris ones, only manual iris types are really worth using.
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blotafton
Joined: 08 Aug 2013
Posts: 1633
Location: Sweden
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| Posted: Tue Mar 10, 2015 2:08 am Post subject: |
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blotafton wrote:
Thanks, I'll be looking!  |
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Tue Mar 10, 2015 8:59 am Post subject: |
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iangreenhalgh1 wrote:
Good luck with your search!
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Tue Mar 10, 2015 10:23 pm Post subject: |
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iangreenhalgh1 wrote:
Here's another Computar 6mm identical to mine, same seller, just ask him to send only the lens and scrap the camera:
http://www.ebay.co.uk/itm/Vantage-black-and-white-cctv-camera-/301558697503?pt=LH_DefaultDomain_3&hash=item46364c8e1f
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JohnBar
Joined: 21 Jun 2012
Posts: 581
Location: Liverpool
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| Posted: Tue Mar 10, 2015 10:51 pm Post subject: |
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JohnBar wrote:
good results, well done!
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Wed Mar 11, 2015 2:25 am Post subject: |
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iangreenhalgh1 wrote:
Cheers John. Better grab some cheap c mounts before I go and popularise them in some way. 
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JohnBar
Joined: 21 Jun 2012
Posts: 581
Location: Liverpool
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| Posted: Wed Mar 11, 2015 2:36 pm Post subject: |
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JohnBar wrote:
Yep, I have been looking at those megapixel series ones, fantastic performance
still looking for the 8mm f1.2 at a cheap price
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