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ferrick
Joined: 20 Apr 2012
Posts: 643
Location: Hong Kong
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 Posted: Mon Jan 07, 2013 2:45 pm Post subject: Converting a 3.7mm f1.6 CCTV lens for use on Pentax-Q |
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ferrick wrote:
I bought this CS-mount Cosmicar/Pentax TV Lens for $22 from eBay. I dismantled all the rear part rings from the lens, leaving the plastic tube containing the rear lens element. The tube is about d-mount size. I screwed it into a d-to-P/Q adapter and the outer wall of the tube was forced into d-mount thread!  Then I can use the thread as a focusing device. The resulting lens is a 20mm equivalent lens when used on Pntax-Q! Comments on the performance of this lens are welcome.
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Attila
Joined: 24 Feb 2007
Posts: 57849
Location: Hungary
Expire: 2025-11-18
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| Posted: Mon Jan 07, 2013 2:55 pm Post subject: |
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Attila wrote:
Not bad at all, now you have a better compact , but with 20mm lens. How do you like Q ? How do you happy with image quality on bright light , trees , bush, flowers etc ?
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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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ferrick
Joined: 20 Apr 2012
Posts: 643
Location: Hong Kong
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| Posted: Mon Jan 07, 2013 3:04 pm Post subject: |
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ferrick wrote:
| Attila wrote: |
| Not bad at all, now you have a better compact , but with 20mm lens. How do you like Q ? How do you happy with image quality on bright light , trees , bush, flowers etc ? |
I purchased my Q for just two weeks and I love it! I have tried several d-mount and c-mount lenses and the results were just great. PQ of course cannot compare with DSLR with larger sensor. However, with a sensor of just 6mm x 5mm, it really delivers a lot! It's compact and I enjoy using it very much!
I add here a picture taken by Cosmicar 12.5mm f1.9 c-mount lens.
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Attila
Joined: 24 Feb 2007
Posts: 57849
Location: Hungary
Expire: 2025-11-18
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| Posted: Mon Jan 07, 2013 3:16 pm Post subject: |
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Attila wrote:
Good one too! I plan to buy it also and play with many C and D mount lenses, nice picture again. Tiny sensor is not visible at all.
I would like to ask you to publish each lens in separate topics with following titles.
'Lens name' Pentax Q it will help a lot to search engines and to members also to find samples later.
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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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ferrick
Joined: 20 Apr 2012
Posts: 643
Location: Hong Kong
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| Posted: Mon Jan 07, 2013 3:19 pm Post subject: |
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ferrick wrote:
[quote="Attila"]Good one too! I plan to buy it also and play with many C and D mount lenses, nice picture again. Tiny sensor is not visible at all.
I would like to ask you to publish each lens in separate topics with following titles.
'Lens name' Pentax Q it will help a lot to search engines and to members also to find samples later.[/quote]
Noted. Will do! |
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Attila
Joined: 24 Feb 2007
Posts: 57849
Location: Hungary
Expire: 2025-11-18
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| Posted: Mon Jan 07, 2013 3:23 pm Post subject: |
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Attila wrote:
Coool! I look forward more!
_________________
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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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poilu
Joined: 26 Aug 2007
Posts: 10471
Location: Greece
Expire: 2019-08-29
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| Posted: Mon Jan 07, 2013 3:42 pm Post subject: |
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poilu wrote:
impressive indeed, great adaptation !
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luisalegria
Joined: 07 Mar 2008
Posts: 6627
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Mon Jan 07, 2013 6:13 pm Post subject: |
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luisalegria wrote:
Do you need to focus a 3.7mm lens ?
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I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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ferrick
Joined: 20 Apr 2012
Posts: 643
Location: Hong Kong
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| Posted: Mon Jan 07, 2013 10:50 pm Post subject: |
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ferrick wrote:
[quote="luisalegria"]Do you need to focus a 3.7mm lens ?[/quote]
At wide-open f1.6, I need to focus. When stopped down to about f4, no focusing is needed. |
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David
Joined: 13 Apr 2011
Posts: 1869
Location: Denver, Colorado
Expire: 2013-01-25
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| Posted: Tue Jan 08, 2013 1:54 am Post subject: |
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David wrote:
Aside from some barrel distortion, the IQ is really great. Doe the Q allow you to store lens profiles and adjust how the sensor reacts to different lenses? That might help eliminate the distortion.
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ferrick
Joined: 20 Apr 2012
Posts: 643
Location: Hong Kong
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| Posted: Tue Jan 08, 2013 1:48 pm Post subject: |
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ferrick wrote:
[quote="poilu"]impressive indeed, great adaptation ![/quote]
Thanks, poilu! |
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ferrick
Joined: 20 Apr 2012
Posts: 643
Location: Hong Kong
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| Posted: Tue Jan 08, 2013 1:50 pm Post subject: |
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ferrick wrote:
[quote="David"]Aside from some barrel distortion, the IQ is really great. Doe the Q allow you to store lens profiles and adjust how the sensor reacts to different lenses? That might help eliminate the distortion.[/quote]
Yes! I downloaded free firmware v.1.01 and is allowed to input focal length of the manual lens attached. |
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ferrick
Joined: 20 Apr 2012
Posts: 643
Location: Hong Kong
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| Posted: Tue Jan 08, 2013 1:55 pm Post subject: |
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ferrick wrote:
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15685
Expire: 2014-01-07
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| Posted: Tue Jan 08, 2013 3:03 pm Post subject: |
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iangreenhalgh1 wrote:
I'm really surprised how nice these results are! Now I must grab some c and d mount lenses and a q!
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I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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ferrick
Joined: 20 Apr 2012
Posts: 643
Location: Hong Kong
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| Posted: Tue Jan 08, 2013 4:08 pm Post subject: |
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ferrick wrote:
[quote="iangreenhalgh1"]I'm really surprised how nice these results are! Now I must grab some c and d mount lenses and a q![/quote]
Yes, I am surprised by it too! When it was out on the market last year, it was priced at HK$7000 ! (approx. US$900!) It was way too high! Now that Q10 is out, Q's price is adjusted to HK$2,600. Everything suddenly becomes reasonable and thus I purchased one. It's a correct decision, I guess! |
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