| View previous topic :: View next topic |
| Author |
Message |
mikkokan
Joined: 17 Apr 2012
Posts: 170
Location: Finland
Expire: 2015-12-02
|
 Posted: Wed Oct 31, 2012 6:52 am Post subject: Pentacon 29mm extreme blurriness in corners |
 |
|
mikkokan wrote:
Hi!
So I have this Pentacon 29mm 2.8 M42. It looks like new, glasses are clear. I posted this sample already to Digital Gallery but I think this belong to here.
Is this normal behavior in full frame. Sample from center to right corner. I've never seen nothing like this before! I think I'll sell this lens to someone with cropped sensor 1.6.
_________________
Canon EOS 1Ds mkII, 1D mkIV, 1D mkII, Fuji X-E1
Takumars 28mm 3.5, 50mm 1.4, 135mm 3.5, Helios 44-2, Tamron 70-210, Domiplan 50mm, Trioplan 100mm
AF-lenses:Canon 24-105L, Sigma 50mm 1.4HSM, Canon 135mm 2.0L, Canon 24-105L, Sigma 12-24, Sigma ART 35mm 1.4 |
|
| Back to top |
|
 |
hifisapi
Joined: 25 Sep 2012
Posts: 941
Location: USA
|
| Posted: Wed Oct 31, 2012 7:11 am Post subject: |
|
|
hifisapi wrote:
something must be wrong with your lens or its just a really bad design, that looks horrible.
_________________
===========
ACQUIRED OVER 30 YEARS:
Cameras: DSLR=Pentax istDS FILM=Pentax SP, SP-F, ESII, SP1000, KX, K2
Lenses : Pentax M42 = Super Multi Coated Takumars 50/1.4 55/1.8 100/4-BELLOWS 500/4.5 1000/8 135-600/6.7 Pentax PK= SMC Pentax-Ks K17/4-FF Fisheye K18/3.5 K20/4 K24/3.5 K28/3.5 K28/2 K35/3.5 K35/2 K50/1.2 K50/1.4K 50/4-MACROK 55/1.8 K85/1.8 K100/4-MACRO K100/4-BELLOWS K105/2.8 K120/2.8 K135/3.5 K135/2.5 K150/4 K200/4 K400/5.6 K45-125/4K 85-210/4.5 Pentax PKM = SMC Pentax-M M40/2.8-Pancake M50/1.4 M75-150/4 M80-200/4.5 Pentax PKA= SMC Pentax-A A15/3.5 A50/2.8-MACRO A28/2 A35/2 A50/1.4 A135/2.8 A200/4 A*300/4 A35-105/3.5 A24-50/4 A70-210/4 TAMRON AD2= SP80-200/2.8 SP180/2.5 TOKINA AT-X PK= ATX28-85/3.5-4.5 ATX35-70/2.8 ATX60-120/2.8 ATX80-200/2.8 ATX100-300/4 ATX90/2.5 MACRO KIRON-LESTER DINE PK = 105/2.8-MACRO VIVITAR PK = 135/2.8-MACRO 28-85/4 NOFLEXAR AUTOBELLOWS PK = 60/4 105/4 |
|
| Back to top |
|
|
Mos6502
Joined: 20 Jun 2011
Posts: 960
Location: Austin
|
| Posted: Wed Oct 31, 2012 7:39 am Post subject: |
|
|
Mos6502 wrote:
A loose or decentered element. |
|
| Back to top |
|
|
mikkokan
Joined: 17 Apr 2012
Posts: 170
Location: Finland
Expire: 2015-12-02
|
| Posted: Wed Oct 31, 2012 7:41 am Post subject: |
|
|
mikkokan wrote:
Thanks! So in theory this can be fixed?
_________________
Canon EOS 1Ds mkII, 1D mkIV, 1D mkII, Fuji X-E1
Takumars 28mm 3.5, 50mm 1.4, 135mm 3.5, Helios 44-2, Tamron 70-210, Domiplan 50mm, Trioplan 100mm
AF-lenses:Canon 24-105L, Sigma 50mm 1.4HSM, Canon 135mm 2.0L, Canon 24-105L, Sigma 12-24, Sigma ART 35mm 1.4 |
|
| Back to top |
|
|
Mos6502
Joined: 20 Jun 2011
Posts: 960
Location: Austin
|
| Posted: Wed Oct 31, 2012 7:45 am Post subject: |
|
|
Mos6502 wrote:
It is possible. If an element is loose it may be as simple as tightening the retaining ring down. But that's just one of several possibilities that could cause the effect shown in your photo. |
|
| Back to top |
|
|
SinfulSaint
Joined: 13 Aug 2012
Posts: 13
Location: Dubrovnik, Croatia
|
| Posted: Wed Oct 31, 2012 7:47 am Post subject: |
|
|
SinfulSaint wrote:
I use the same lens on my A33 APS-C. Never seen anything like it.
_________________
Non Bene Pro Toto Libertas Venditur Auro |
|
| Back to top |
|
|
mikkokan
Joined: 17 Apr 2012
Posts: 170
Location: Finland
Expire: 2015-12-02
|
| Posted: Wed Oct 31, 2012 8:55 am Post subject: |
|
|
mikkokan wrote:
Opened the lens, everything seems to be ok. I also centered the rear element, corners are still blur.
Here are examples after centering (or at least I tried something  )
2.8
4
5.6
8
Does anyone have full frame and this lens that could test if this lens is unusable in full frame.
_________________
Canon EOS 1Ds mkII, 1D mkIV, 1D mkII, Fuji X-E1
Takumars 28mm 3.5, 50mm 1.4, 135mm 3.5, Helios 44-2, Tamron 70-210, Domiplan 50mm, Trioplan 100mm
AF-lenses:Canon 24-105L, Sigma 50mm 1.4HSM, Canon 135mm 2.0L, Canon 24-105L, Sigma 12-24, Sigma ART 35mm 1.4 |
|
| Back to top |
|
|
dsmlogger
Joined: 14 Apr 2010
Posts: 178
Location: Athens, Greece
|
| Posted: Wed Oct 31, 2012 8:59 am Post subject: |
|
|
dsmlogger wrote:
There is obviously something wrong with the placement of the glass elements.
I had the exactly same effect when I had disassembled my Zuiko 50-90mm f/3.5 to clean it and mislpaced one element (turned it upside-down). |
|
| Back to top |
|
|
mikkokan
Joined: 17 Apr 2012
Posts: 170
Location: Finland
Expire: 2015-12-02
|
| Posted: Wed Oct 31, 2012 9:02 am Post subject: |
|
|
mikkokan wrote:
So I have to dig deeper than rear element?
_________________
Canon EOS 1Ds mkII, 1D mkIV, 1D mkII, Fuji X-E1
Takumars 28mm 3.5, 50mm 1.4, 135mm 3.5, Helios 44-2, Tamron 70-210, Domiplan 50mm, Trioplan 100mm
AF-lenses:Canon 24-105L, Sigma 50mm 1.4HSM, Canon 135mm 2.0L, Canon 24-105L, Sigma 12-24, Sigma ART 35mm 1.4 |
|
| Back to top |
|
|
Alex H
Joined: 25 Dec 2011
Posts: 344
|
| Posted: Wed Oct 31, 2012 9:03 am Post subject: |
|
|
Alex H wrote:
Agree with dsmlogger - one of the elements may be reversed.
I once experimented with old Tamron adapt-a-matic 28mm lens by reversing one of the elements in the rear group.
It drastically changed the field curvature of the lens (in my case). |
|
| Back to top |
|
|
mikkokan
Joined: 17 Apr 2012
Posts: 170
Location: Finland
Expire: 2015-12-02
|
| Posted: Wed Oct 31, 2012 9:22 am Post subject: |
|
|
mikkokan wrote:
The rear elements can only be assembled one way. Now the right corner is blurrer than left when dissambled the lens and assembled it again. It looks like this lens is never been disambled earlier, no scratches in srews...
_________________
Canon EOS 1Ds mkII, 1D mkIV, 1D mkII, Fuji X-E1
Takumars 28mm 3.5, 50mm 1.4, 135mm 3.5, Helios 44-2, Tamron 70-210, Domiplan 50mm, Trioplan 100mm
AF-lenses:Canon 24-105L, Sigma 50mm 1.4HSM, Canon 135mm 2.0L, Canon 24-105L, Sigma 12-24, Sigma ART 35mm 1.4 |
|
| Back to top |
|
|
Mos6502
Joined: 20 Jun 2011
Posts: 960
Location: Austin
|
| Posted: Wed Oct 31, 2012 9:34 am Post subject: |
|
|
Mos6502 wrote:
This lens is normally great on full frame. If it weren't they wouldn't have sold so many of them for so long. You can probably find tons of examples on flickr if you look. |
|
| Back to top |
|
|
dok
Joined: 03 Jun 2011
Posts: 34
Location: France
|
| Posted: Wed Oct 31, 2012 11:01 am Post subject: |
|
|
dok wrote:
I have already noticed this problem, and I'm with an APS-C camera.
I own two different copies : the first one is the common Pentacon Auto 29mm f/2.8 Multi Coated and the latter is a one that says "Made in GDR" on the front, has a button to test the DOF (not to be confused with a Manu/Auto switch) and with orange ink for some letters (focus distance if my memory is OK).
Both lenses show the same effect on APS-C and stopping them down does not change things a lot. This defect is less pronounced on the "Made In GDR" copy than the "Multi Coated" one.
_________________
M42 : Fujinon EBC W 35 1.9; Fujinon EBC T 135 2.5; aus Jena DDR Pancolar electric MC 50 1.8; Jupiter 11A 135 4; Kaleinar 5H MC 100 2.8; Pentacon auto 29 2.8 MULTI COATING; Pentacon auto 29 2.8 MADE IN G.D.R.; Pentacon auto MC 135 2.8 (made in Japan!?); Helios 44-2 58 2; Helios 44-4 58 2; Helios 44-5 58 2; Carenar auto 55 1.4; Industar 50-2 50 3.5; Super Takumar 28 3.5; SMC Takumar 35 3.5; SMC Takumar 55 1.8; Sigma Mini-Tele MC 135 3.5; Pentacon 200 4
CONTAX : CZ Distagon 35 2.8; CZ Planar 50 1.7; Makinon 28 2.8 MC; Tamron 24 2.5. |
|
| Back to top |
|
|
Aanything
Joined: 27 Aug 2011
Posts: 2187
Location: Piacenza, Italy
Expire: 2014-05-30
|
| Posted: Wed Oct 31, 2012 11:19 am Post subject: |
|
|
Aanything wrote:
I never noticed anything similar in mine, both on film and aps-c.
Here's a pic I shot with my sony nex to try the adapter when i got it:
And here's a top right corner 100% crop
The pic sucks, ok, but the corner sharpness looks at least decent to me.
I have no film scans, but I'd say it never looked really bad on corners.
Mine is Pentacon Auto Multi Coating version.
_________________
C&C and editing of my pics are always welcome
Samples from my lenses
My gear
My Flickr |
|
| Back to top |
|
|
mikkokan
Joined: 17 Apr 2012
Posts: 170
Location: Finland
Expire: 2015-12-02
|
| Posted: Wed Oct 31, 2012 11:42 am Post subject: |
|
|
mikkokan wrote:
I have now disambled the whole lens and assembled it again. No change. Left corner is sharp but right is very soft. I keep trying
I found this topic: http://forum.mflenses.com/pentacon-29mm-2-8-why-are-one-border-unsharp-t7580.html
_________________
Canon EOS 1Ds mkII, 1D mkIV, 1D mkII, Fuji X-E1
Takumars 28mm 3.5, 50mm 1.4, 135mm 3.5, Helios 44-2, Tamron 70-210, Domiplan 50mm, Trioplan 100mm
AF-lenses:Canon 24-105L, Sigma 50mm 1.4HSM, Canon 135mm 2.0L, Canon 24-105L, Sigma 12-24, Sigma ART 35mm 1.4 |
|
| Back to top |
|
|
mikkokan
Joined: 17 Apr 2012
Posts: 170
Location: Finland
Expire: 2015-12-02
|
| Posted: Wed Oct 31, 2012 12:06 pm Post subject: |
|
|
mikkokan wrote:
I tried to make corners sharp and I did. When I focus to corners, center is unsharp. Field curvature?
_________________
Canon EOS 1Ds mkII, 1D mkIV, 1D mkII, Fuji X-E1
Takumars 28mm 3.5, 50mm 1.4, 135mm 3.5, Helios 44-2, Tamron 70-210, Domiplan 50mm, Trioplan 100mm
AF-lenses:Canon 24-105L, Sigma 50mm 1.4HSM, Canon 135mm 2.0L, Canon 24-105L, Sigma 12-24, Sigma ART 35mm 1.4 |
|
| Back to top |
|
|
Mos6502
Joined: 20 Jun 2011
Posts: 960
Location: Austin
|
| Posted: Wed Oct 31, 2012 12:26 pm Post subject: |
|
|
Mos6502 wrote:
Perhaps a group was cemented together off center. 
If any element "looks" the same both forwards and backwards you might try it both ways just in case too. |
|
| Back to top |
|
|
mikkokan
Joined: 17 Apr 2012
Posts: 170
Location: Finland
Expire: 2015-12-02
|
| Posted: Wed Oct 31, 2012 12:32 pm Post subject: |
|
|
mikkokan wrote:
I have now disambled and assembled the lens maybe 8 times. There was one glass that looked the same both sides and yes I tried to put it both ways. No difference. Everything is centered and locked like they should be.
Well it was great learning lesson, I've never dissambled a lens earlier. There must be something wrong that I cannot fix. I'll buy the Takumar 28mm instead I think and sell this one or give it to someone.
Thank you all very much for your comments and help!!!
_________________
Canon EOS 1Ds mkII, 1D mkIV, 1D mkII, Fuji X-E1
Takumars 28mm 3.5, 50mm 1.4, 135mm 3.5, Helios 44-2, Tamron 70-210, Domiplan 50mm, Trioplan 100mm
AF-lenses:Canon 24-105L, Sigma 50mm 1.4HSM, Canon 135mm 2.0L, Canon 24-105L, Sigma 12-24, Sigma ART 35mm 1.4 |
|
| Back to top |
|
|
Mos6502
Joined: 20 Jun 2011
Posts: 960
Location: Austin
|
| Posted: Wed Oct 31, 2012 4:01 pm Post subject: |
|
|
Mos6502 wrote:
It could be fun for some "toy camera" type shots.  |
|
| Back to top |
|
|
iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
|
| Posted: Wed Oct 31, 2012 4:33 pm Post subject: |
|
|
iangreenhalgh1 wrote:
Something wrong for sure with this copy, sadly.
_________________
I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
|
| Back to top |
|
|
Aanything
Joined: 27 Aug 2011
Posts: 2187
Location: Piacenza, Italy
Expire: 2014-05-30
|
| Posted: Wed Oct 31, 2012 5:04 pm Post subject: |
|
|
Aanything wrote:
| mikkokan wrote: |
I have now disambled and assembled the lens maybe 8 times. There was one glass that looked the same both sides and yes I tried to put it both ways. No difference. Everything is centered and locked like they should be.
Well it was great learning lesson, I've never dissambled a lens earlier. There must be something wrong that I cannot fix. I'll buy the Takumar 28mm instead I think and sell this one or give it to someone.
Thank you all very much for your comments and help!!! |
If you want, I am selling my Pentacon.
Anyway, if you plan to get the takumar, you will probably get a better lens than a good pentacon.
_________________
C&C and editing of my pics are always welcome
Samples from my lenses
My gear
My Flickr |
|
| Back to top |
|
|
Pancolart
Joined: 04 Feb 2008
Posts: 3702
Location: Slovenia, EU
Expire: 2013-11-18
|
| Posted: Wed Oct 31, 2012 5:23 pm Post subject: |
|
|
Pancolart wrote:
| mikkokan wrote: |
I have now disambled and assembled the lens maybe 8 times. There was one glass that looked the same both sides and yes I tried to put it both ways. No difference. Everything is centered and locked like they should be.
Well it was great learning lesson, I've never dissambled a lens earlier. There must be something wrong that I cannot fix. I'll buy the Takumar 28mm instead I think and sell this one or give it to someone.
Thank you all very much for your comments and help!!! |
Did you adjust three screws holding rear system? The concept is just like in later version. Photos here: http://forum.mflenses.com/viewtopic.php?t=48467
_________________
---------------------------------
The Peculiar Apparatus Of Victorian Steampunk Photography: 100+ Genuine Steampunk Camera Designs https://www.amazon.com/dp/B0B92829NS |
|
| Back to top |
|
|
mikkokan
Joined: 17 Apr 2012
Posts: 170
Location: Finland
Expire: 2015-12-02
|
| Posted: Wed Oct 31, 2012 6:11 pm Post subject: |
|
|
mikkokan wrote:
Yes I did, four times, no change.
_________________
Canon EOS 1Ds mkII, 1D mkIV, 1D mkII, Fuji X-E1
Takumars 28mm 3.5, 50mm 1.4, 135mm 3.5, Helios 44-2, Tamron 70-210, Domiplan 50mm, Trioplan 100mm
AF-lenses:Canon 24-105L, Sigma 50mm 1.4HSM, Canon 135mm 2.0L, Canon 24-105L, Sigma 12-24, Sigma ART 35mm 1.4 |
|
| Back to top |
|
|
Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
|
| Posted: Wed Oct 31, 2012 6:15 pm Post subject: |
|
|
Attila wrote:
Some lenses around end of communism was assembled by kids as vacation work Meyer Domiplan and Pentacon 29mm surely , due lot of crap come to second hand market and only a few are good.
_________________
-------------------------------
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
|
|
| Back to top |
|
|
hifisapi
Joined: 25 Sep 2012
Posts: 941
Location: USA
|
| Posted: Wed Oct 31, 2012 8:28 pm Post subject: |
|
|
hifisapi wrote:
whatever you do, dont sell it. you'll just make someone very mad.
_________________
===========
ACQUIRED OVER 30 YEARS:
Cameras: DSLR=Pentax istDS FILM=Pentax SP, SP-F, ESII, SP1000, KX, K2
Lenses : Pentax M42 = Super Multi Coated Takumars 50/1.4 55/1.8 100/4-BELLOWS 500/4.5 1000/8 135-600/6.7 Pentax PK= SMC Pentax-Ks K17/4-FF Fisheye K18/3.5 K20/4 K24/3.5 K28/3.5 K28/2 K35/3.5 K35/2 K50/1.2 K50/1.4K 50/4-MACROK 55/1.8 K85/1.8 K100/4-MACRO K100/4-BELLOWS K105/2.8 K120/2.8 K135/3.5 K135/2.5 K150/4 K200/4 K400/5.6 K45-125/4K 85-210/4.5 Pentax PKM = SMC Pentax-M M40/2.8-Pancake M50/1.4 M75-150/4 M80-200/4.5 Pentax PKA= SMC Pentax-A A15/3.5 A50/2.8-MACRO A28/2 A35/2 A50/1.4 A135/2.8 A200/4 A*300/4 A35-105/3.5 A24-50/4 A70-210/4 TAMRON AD2= SP80-200/2.8 SP180/2.5 TOKINA AT-X PK= ATX28-85/3.5-4.5 ATX35-70/2.8 ATX60-120/2.8 ATX80-200/2.8 ATX100-300/4 ATX90/2.5 MACRO KIRON-LESTER DINE PK = 105/2.8-MACRO VIVITAR PK = 135/2.8-MACRO 28-85/4 NOFLEXAR AUTOBELLOWS PK = 60/4 105/4 |
|
| Back to top |
|
|
|
|
Search
Memberlist
Register
Profile
Log in to check your private messages
Log in
