 |
|
| View previous topic :: View next topic |
| Author |
Message |
Abbazz
Joined: 23 Jun 2007
Posts: 382
Location: Brunei
|
 Posted: Tue Nov 06, 2007 1:00 pm Post subject: |
 |
|
| TDN wrote: | | Veyr interesting about those Nikkors, I will experiment with that. Old Nikon glass is often cheaper than the Pentax equivalent, prices have gone up lately for Pentax... |
Tom,
If you want to experiment without breaking the bank, get the Nikkor-H (or HC for the multicoated version) 50/2. That's one of the best Nikon lenses and one of the cheapest too. See this thread: http://forum.mflenses.com/viewtopic.php?t=2702
Cheers!
Abbazz
_________________
Il n'y a rien dans le monde qui n'ait son moment décisif, et le chef-d'oeuvre de la bonne conduite est de connaître et de prendre ce moment. - Cardinal de Retz
The 6x9 Photography Online Resource:
http://artbig.com/ |
|
| Back to top |
|
 |
Jesito
Joined: 24 Aug 2007
Posts: 1866
Location: Sitges, (Spain)
|
| Posted: Tue Nov 06, 2007 1:16 pm Post subject: Re: Samsung GX - 1 S / L |
|
|
Thanks Cosmin, added to the list...
Best regards.
Jes.
_________________
Jesito's backsack:
Zooms Sigma 18-200, Tamron 35-135 and 70-210 short, 70-210 long, 28-70 CF Macro (Adaptall)
Fixed CZJ Planar 50mm 1.7, Helios 44-2, Cosinon 28mm, CZJ Sonnar 135, Industar-61, Jupiter-9, Industar-50, CZJ Pancolar 50/1.8
DSLR Canon 350D, Pentax K10D
TLR/6x6/645 YashicaMat, Agfa Isolette II, Mamiya 645E
SLR Minolta X300, Fuji STX I, Fuji STX II, Praktica VLC3, Pentax P30, EXA500, EXA 1A
Rangefinders Chinon 35EE, Konica C35 auto, Olympus 35RC, Canonet 28, Yashica Lynx, FED-2, Yashica electro 35, Argus C3, Regula Cita III, Voigtlander Vitoret LR
Compact Film Konica C35V, Voigtlander Vitorets, Minox 35 ML
Compact Digital Caplio GX100, Aiptek Slim 3000, Canon Powershot 520
Life is that boring wasted time in between two pictures |
|
| Back to top |
|
|
xtriky
Joined: 05 Nov 2007
Posts: 17
Location: Oklahoma, US
|
| Posted: Mon Nov 26, 2007 4:18 am Post subject: |
|
|
Some updates on lens mount conversion:
I did successfully convert Yashica ML and Olympus OM lenses into P/K mount by using the Fotodiox M42->P/K adapter (the one with flange). All converted lenses will fit, stay locked and have perfect infinity focus on my K10D.
So far, I am able to use my K10D with the following lens systems: M42, P/K MF&AF, Nikon-F, Contax/Yashica and Olympus OM. My next target should be Leica R but the only problem is the price of Leica ::sigh:: Hope that I will be lucky enough to get a cheap Leica R lens for my experiment  |
|
| Back to top |
|
|
Attila
Joined: 24 Feb 2007
Posts: 13288
Location: Budapest,Hungary
|
| Posted: Mon Nov 26, 2007 2:01 pm Post subject: |
|
|
This is good news for many Pentax owner, thank you for sharing!
_________________
Olympus E-1,Nikon FA,Pentax MX,Praktica VLC3,Olympus-OM2N,Yashica Eletro 35 GN,Exakta Varex IIb,
-------------------------------------------------------------------------------------------------------------------
Carl Zeiss Jena:Flektogon 2.8/20mm,4/25mm,2.4/35,2.8/65mm,4.5/4cm Tessar
Pancolar 1.4/55mm,1.8/50mm,1.8/80mm,Tessar 2.8/50mm,Biotar 2/58mm,1.5/75mm,1.5/7,5cm
Carl Zeiss: Sonnar 2.8/135,2.8/180mm,Tessar 4/135mm
Nikon: 3.5/20mm,2.8/28mm,1.4/35mm,1.4/50mm,1.2/50mm,2/50mm,1.8/105mm,2.5/105mm,2.8/180mm,4/200mm macro,4.5/300mm
Pentax: Pentax 1.2/50mm,1.8/85mm,4/200mm
Helios: Helios-40 1.5/8,5cm,Helios-44-1 2/58mm,Helios-44-2 2/58mm
Olympus OM: 3.5/18mm,3.5/21mm,1.4/50mm,3.5/55mm macro,2.8/135mm,2/90mm macro,35-70mm,60-250mm
Meyer: 4.5/35mm Primagon,Primoplan 1.9/58mm,1.9/75mm,2.8/100mm,Orestegor 2.8/135mm,4.5/40 Helioplan
|
|
| Back to top |
|
|
niblue
Joined: 19 Oct 2007
Posts: 545
Location: Edinburgh, Scotland
|
| Posted: Mon Nov 26, 2007 2:35 pm Post subject: |
|
|
I saw a cheap C/Y 28mm F2.8 in a 2nd hand shop today so might pick it up later in the week and try the mount conversion on it.
_________________
Regards
Steve |
|
| Back to top |
|
|
xtriky
Joined: 05 Nov 2007
Posts: 17
Location: Oklahoma, US
|
|
| Back to top |
|
|
poilu
Joined: 26 Aug 2007
Posts: 2469
Location: Greece
|
| Posted: Wed Dec 26, 2007 7:57 pm Post subject: |
|
|
cheer xtricky, wonderful job
nice project for the contax 50 1.7 of Jes 
_________________
Have a nice day
 |
|
| Back to top |
|
|
Orio
Joined: 24 Feb 2007
Posts: 10764
Location: West Emilia
|
| Posted: Wed Dec 26, 2007 8:20 pm Post subject: |
|
|
I can answer your question: there is no "Made in Germany" version of the 1.7/50 Planar and neither of the 1.4/50 Planar. Both lenses have been only assembled in Japan.
As for the "Made in Japan vs. Made in Germany" issue, I have enough experience on Contax lenses now, to tell you that this is just fantasies. There is only one difference that counts, that is, between AE and MM models, because some of the Contax lenses have been optically improved in occasion of the launch of the MM system. These lenses include at least the Distagon 2.8/25, Distagon 2.8/28 and Sonnar 2.8/135, which are verified - but may also include other models for which there is no official verification.
I had the possibility to test head-to-head two Sonnars 2.8/85, both AE version, one Germany one Japan, and the difference between the two was so minimal, to be considered absolutely negligible and well within the unavoidable tolerance limit of the difference between two physical objects that were, still, largely hand-made.
As for your Planar 1.7/50 being a bad copy, everything is possible, especially if the lens was opened and not properly reassembled by a previous owner. The quality control at Zeiss is so good that it's really unlikely that you may have gotten a copy that was poor quality since the factory release. I think it's more likely (or less unlikely if you prefer) that your manipulation of the lens might be the cause somehow.
-
_________________
_
ХОРИОС-61 ( ώρεος ) : Lens sana in corpore sano
Main Tools:
LENSES: Russian, Zeiss, Leitz, old Nikkors.
DSLR: Canon 5D, 400D. SLR: Voigtländer Bessaflex TM, Nikon FM2, Canon 50E, Contax 167MT.
RANGEFINDERS: Contax G2, Canonette QL17. MEDIUM FORMAT: Pentacon 6, Zeiss Super Ikonta.
Read Full List HERE
www.timelessphotography.eu
www.oriofoto.net
"Freedom is the right to tell people what they do not want to hear. " (George Orwell)
_ |
|
| Back to top |
|
|
xtriky
Joined: 05 Nov 2007
Posts: 17
Location: Oklahoma, US
|
| Posted: Thu Dec 27, 2007 12:24 am Post subject: |
|
|
| Orio, thanks for your answer. As you see from the description, my modification has minimal to no effect to the glass. Anyway I will open and clean the lens somehow. |
|
| Back to top |
|
|
Orio
Joined: 24 Feb 2007
Posts: 10764
Location: West Emilia
|
| Posted: Thu Dec 27, 2007 12:36 am Post subject: |
|
|
| xtriky wrote: | | Orio, thanks for your answer. As you see from the description, my modification has minimal to no effect to the glass. Anyway I will open and clean the lens somehow. |
I'm not sure about this xtricky. As you know, lenses are precision objects that are carefully calibrated to give optimal performance. Very expensive measuring instruments are used for this task, which means, this is not something that can be done "at spans".
I had a mail exchange with a Zeiss engineer a little time ago, and he explained me that Zeiss calibrates the lenses at infinity focus - which is also the focal point all MTF tests for lenses are made by Zeiss.
Based on what you wrote, you have shifted the position of the helicoid for this lens. Thus, shifting all focusing positions beyond the original calibration, in order to reach infinity focus. But Zeiss did not create the lens to be calibrated this way.
I am not a technician, but I would bet some that this has an impact of performance. All lenses, except for those who have floating elements, do perform differently at different focal points. Your Planar is now not calibrated as it ideally should. So a little loss in performance is, in my opinion, plausible.
-
_________________
_
ХОРИОС-61 ( ώρεος ) : Lens sana in corpore sano
Main Tools:
LENSES: Russian, Zeiss, Leitz, old Nikkors.
DSLR: Canon 5D, 400D. SLR: Voigtländer Bessaflex TM, Nikon FM2, Canon 50E, Contax 167MT.
RANGEFINDERS: Contax G2, Canonette QL17. MEDIUM FORMAT: Pentacon 6, Zeiss Super Ikonta.
Read Full List HERE
www.timelessphotography.eu
www.oriofoto.net
"Freedom is the right to tell people what they do not want to hear. " (George Orwell)
_ |
|
| Back to top |
|
|
xtriky
Joined: 05 Nov 2007
Posts: 17
Location: Oklahoma, US
|
| Posted: Thu Dec 27, 2007 2:13 am Post subject: |
|
|
| Very good point, Orio. I did not think about it at all. I learn so much from you. However, in order to test this "hypothesis" I need somebody have the CZ 50/1.7 and mod it the same way as I do. Then please make some sharpness test and report the result. I still believe that I got a bad copy. |
|
| Back to top |
|
|
Orio
Joined: 24 Feb 2007
Posts: 10764
Location: West Emilia
|
| Posted: Thu Dec 27, 2007 2:28 am Post subject: |
|
|
| xtriky wrote: | | Very good point, Orio. I did not think about it at all. I learn so much from you. However, in order to test this "hypothesis" I need somebody have the CZ 50/1.7 and mod it the same way as I do. Then please make some sharpness test and report the result. I still believe that I got a bad copy. |
Mine are just guesses, xtriky, so my advice is to not learn from me  . If you like, you can write to Zeiss (www.zeiss.de) and ask. A technician will reply, they are very responsive.
Bad copies may happen of course. But sincerely, I have bought 25 Contax lenses and I can not say that I have ever met one bad copy. So either I am extremely lucky, or, bad Contax copies are extremely rare. I personally believe that with the kind of quality control Zeiss has, a bad copy is certainly the result of some unadequate user action - or accident. You don't know the previous owners of this lens, so anything might have happened with it.
I don't know the Takumar 55 (I have the SMC 1.4/50) and the Zuiko, but I know enough about the Yashica ML 1.4/50 to be sure that it can not be superior to the Planar 1.7/50, because reviewers rate the Yashica 1.4/50 inferior in performance to the Yashica 1.7/50, which in turn was tested against the Planar 1.7/50 and the Planar gave a better performance. Of course this is not undisputable truth and I don't have the links for that test anymore, but what I am trying to say is that if the Planar performs worse than the Zuiko or Takumar, that might be also normal - but if it performs worse than the Yashica 1.4/50, then there is surely something wrong with the Planar.
Here's some pictures I took in the last days with my Planar 1.7/50:
On 400D:
On 400D:
On 400D, wide open:
On 400D:
http://www.oriofoto.net/temp/gchoir2007_a/slides/gchoir2007_20.html
On 400D:
http://www.oriofoto.net/temp/gchoir2007_a/slides/gchoir2007_21.html
On 400D:
http://www.oriofoto.net/temp/gchoir2007_a/slides/gchoir2007_22.html
Of course these are resizes so they can not show the real sharpness, but they should be detailed enough to let you guess that behind, there is a really sharp lens.
-
_________________
_
ХОРИОС-61 ( ώρεος ) : Lens sana in corpore sano
Main Tools:
LENSES: Russian, Zeiss, Leitz, old Nikkors.
DSLR: Canon 5D, 400D. SLR: Voigtländer Bessaflex TM, Nikon FM2, Canon 50E, Contax 167MT.
RANGEFINDERS: Contax G2, Canonette QL17. MEDIUM FORMAT: Pentacon 6, Zeiss Super Ikonta.
Read Full List HERE
www.timelessphotography.eu
www.oriofoto.net
"Freedom is the right to tell people what they do not want to hear. " (George Orwell)
_ |
|
| Back to top |
|
|
xtriky
Joined: 05 Nov 2007
Posts: 17
Location: Oklahoma, US
|
| Posted: Sun Dec 30, 2007 4:40 pm Post subject: |
|
|
I really appreciate Orio for his help. I did open and clean the Zeiss 50/1.7 and remounted it @ 4 o'clock position. And it show some improvement in sharpness but still not at the level of Orio's copy  However, I am busy doing another lens conversion project and don't have much time to play around with that Zeiss for further investigation.
This is my current project: convert Canon FL 85mm 1.8 to P/K mount. For detail please take a look here http://forum.manualfocus.org/viewtopic.php?pid=75209#p75209 |
|
| Back to top |
|
|
kuuan
Joined: 14 Jan 2008
Posts: 227
Location: right now: Bali, Indonesia
|
| Posted: Wed Jan 30, 2008 12:00 am Post subject: photo of M42 adapter mounted on Pentax body |
|
|
just for the record, this is how a Pentax M42 - K mount adapter fits into the K-mount of a Pentax SLR body
( here on a Pentax ME Super, but of course the fit is the same on dSLR Pentax )
_________________
lenses M42:
Super Tak: 35 f3.5 - 50 f1.4 - 55 f1.8 - 105 f2.8 - 135 f3.5
S.M.C. Tak: 28 f3.5 - 50 f1.4 - Macro50 f4 - 105 f2.8 - 200 f4
SMC Tak: 55mm f1.8
Jupiter 9 85 f2 - Berolina 135 f2.8 - Kominar 135 f3.5 - Pentacon 135 f2.8 elec. - Soligor 180 f3.5 - Meyer Telemegor alu 180 f5.5
Pentax K-mount: Pentax A28 f2.8 - Pentax M50 f2 - Osawa 75-150 f3.8macro
cams: Pentax *istDs - Minolta A2 - FujiF31fd - Ricoh R3 - Pentax ME Super - Pentax SV - Yashica CCN wide
my photos: http://www.flickr.com/photos/kuuan/ |
|
| Back to top |
|
|
nemesis101
Joined: 25 Mar 2008
Posts: 261
Location: Oregon USA
|
| Posted: Tue Mar 25, 2008 7:35 am Post subject: Pentax K10D with almost any lens! |
|
|
| hacksawbob wrote: | | You mean you can mount M42 lenses AND use IS with them! why am I wasting my time with canon! |
I have a K10D (and soon I hope the K20D) and as long as I can get a lens to fit - and every K mount lens will, as will Canon, Nikon, Olympus and most others with an adapter, let alone my growing collection of SP Adaptalls, then I have Image Stabilisation for all! I understand that IS 'in lens' has its proponents, and as a Canon user of 30 years I would not care to deride their kit, but having every lens I use image stabilised, given my aged shaky hands, is a real boon! Now with live view as well on the K20D I may even be able to focus too? lol
MF Lenses:
Olympus 1.2 50mm Zuiko prime
Tamron Adaptall 2 SP 70-210 3.5 (Wonderful but very heavy!)
Tamron Adaptall 2 70-210 158A (As light as the other is heavy!)
Tamron Adaptall 2 80-210 103A (Middleweight!)
Tamron SP 2x Adapter (2 off)
Sears 70-210 F4 (A fair zoom for pennies!)
Sears 135mm 2.8 (quite good for 6 dollars off e-bay?)
Pentax-A 50mm F2 Prime
Super Takumar 135
Super Takumar 200 |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ
Search
Memberlist
Usergroups
Rss feed
Register
Profile
Log in to check your private messages
Log in
