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Oldhand
Joined: 01 Apr 2013 Posts: 6006 Location: Mid North Coast NSW - Australia
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Posted: Sun Feb 09, 2014 9:25 am Post subject: Mamiya Sekor 55mm f1.8 |
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Oldhand wrote:
We have been out all day and returned late this afternoon.
I packed my trusty K-10D with Mamiya Sekor 55/1.8 this morning but never got a chance to use it all day (went to Coffs Harbour and back - long story).
However just before we left this morning, there was an early shaft of light that illuminated this humble nasturtium.
Just thought I would share it here.
OH
Crop:
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Igor
Joined: 13 Jan 2014 Posts: 520 Location: United States and Ukraine, Europe
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Posted: Sun Feb 09, 2014 10:02 am Post subject: |
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Igor wrote:
awesome colors! |
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kendo1
Joined: 07 Dec 2012 Posts: 171 Location: Edinburgh
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Posted: Sun Feb 09, 2014 10:11 am Post subject: |
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kendo1 wrote:
Really like that.
It's great being in just the right place at the right time |
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pentaxpete
Joined: 02 Dec 2011 Posts: 640 Location: BRENTWOOD England
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Posted: Sun Feb 09, 2014 10:20 am Post subject: |
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pentaxpete wrote:
Yes -- here in Essex England we have forgotten what 'Sunlight' looks like -- only RAIN if you want some ! _________________ Long Live REAL PHOTOGRAPHY ! |
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Oldhand
Joined: 01 Apr 2013 Posts: 6006 Location: Mid North Coast NSW - Australia
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Posted: Sun Feb 09, 2014 10:29 am Post subject: |
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Oldhand wrote:
pentaxpete wrote: |
Yes -- here in Essex England we have forgotten what 'Sunlight' looks like -- only RAIN if you want some ! |
Thanks folks for the kind words.
We are desperate for rain in Australia.
The whole country is effectively in drought, with farmers having to destroy stock for lack of feed.
Extremely hot as well. Temps around the 40+ degrees C mark (104+F) daily with no end in sight for another month at least.
Yes please - send us some of your rain and you can have some of our sunshine gladly.
Back to the lens - it is pleasing in its colours I think, like most Mamiyas.
OH |
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wolfhansen
Joined: 06 Oct 2013 Posts: 511 Location: Germany, Ruhr Area
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Posted: Sun Feb 09, 2014 11:28 am Post subject: |
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wolfhansen wrote:
Very nice lens indeed - imho a little underrated. Works fine on my Nex-6.
#1
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#4
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#6
Last edited by wolfhansen on Fri Nov 17, 2017 8:01 am; edited 1 time in total |
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uddhava
Joined: 22 Aug 2012 Posts: 3071 Location: Hungary
Expire: 2021-06-21
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Posted: Sun Feb 09, 2014 1:29 pm Post subject: |
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uddhava wrote:
Nice photo.
Glad you made the effort to take it. |
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stingOM
Joined: 27 Sep 2007 Posts: 3168 Location: Ireland
Expire: 2012-12-27
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Posted: Sun Feb 09, 2014 7:29 pm Post subject: |
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stingOM wrote:
Wonderful images |
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Oldhand
Joined: 01 Apr 2013 Posts: 6006 Location: Mid North Coast NSW - Australia
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Posted: Mon Feb 10, 2014 4:15 am Post subject: |
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Oldhand wrote:
wolfhansen wrote: |
Very nice lens indeed - imho a little underrated. Works fine on my Nex-6.
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Agreed.
There seems to have been a renewed growth in interest in Mamiya glass recently.
Well deserved IMHO.
OH |
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LucisPictor
Joined: 26 Feb 2007 Posts: 17633 Location: Oberhessen, Germany / Maidstone ('95-'96)
Expire: 2013-12-03
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Posted: Mon Feb 10, 2014 12:16 pm Post subject: |
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LucisPictor wrote:
Great light! Nice lens.
I also like my copy a lot.
And yes, please send some sunshine over here to Germany as well. _________________ Personal forum activity on pause every now and again (due to job obligations)!
Carsten, former Moderator
Things ON SALE
Carsten = "KAPCTEH" = "Karusutenu" | T-shirt?.........................My photos from Emilia: http://www.schouler.net/emilia/emilia2011.html
My gear: http://retrocameracs.wordpress.com/ausrustung/
Old list: http://forum.mflenses.com/viewtopic.php?t=65 (Not up-to-date, sorry!) | http://www.lucispictor.de | http://www.alensaweek.wordpress.com |
http://www.retrocamera.de |
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Oldhand
Joined: 01 Apr 2013 Posts: 6006 Location: Mid North Coast NSW - Australia
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Posted: Tue Nov 14, 2017 5:58 am Post subject: |
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Oldhand wrote:
We lost the images from this thread some time back.
I have decided to shoot some new ones.
All at widest aperture and from my back yard of course.
Here we go
Tom
#1
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#4
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folderholder
Joined: 24 Jan 2010 Posts: 102 Location: California
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Posted: Tue Nov 14, 2017 11:53 am Post subject: |
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folderholder wrote:
I have only one Mamiya-Sekor lens (135mm) and it, too, produces lovely colors. _________________ Best wishes,
Peter
www.pandacollector.com |
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uddhava
Joined: 22 Aug 2012 Posts: 3071 Location: Hungary
Expire: 2021-06-21
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Posted: Tue Nov 14, 2017 12:46 pm Post subject: |
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uddhava wrote:
Nice photos!
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papasito
Joined: 09 Jan 2015 Posts: 1658
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Posted: Thu Nov 16, 2017 11:41 pm Post subject: |
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papasito wrote:
Which version, the 6/4 or the 6/5? |
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Oldhand
Joined: 01 Apr 2013 Posts: 6006 Location: Mid North Coast NSW - Australia
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Posted: Fri Nov 17, 2017 4:48 am Post subject: |
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Oldhand wrote:
papasito wrote: |
Which version, the 6/4 or the 6/5? |
Good question - how do I tell them apart?
Tom |
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wolfhansen
Joined: 06 Oct 2013 Posts: 511 Location: Germany, Ruhr Area
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Posted: Fri Nov 17, 2017 8:04 am Post subject: |
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wolfhansen wrote:
Thomas, thanks for the reminder - pictures restored _________________ Greets
Wolfgang |
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Oldhand
Joined: 01 Apr 2013 Posts: 6006 Location: Mid North Coast NSW - Australia
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Posted: Fri Nov 17, 2017 8:08 am Post subject: |
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Oldhand wrote:
wolfhansen wrote: |
Thomas, thanks for the reminder - pictures restored |
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papasito
Joined: 09 Jan 2015 Posts: 1658
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Posted: Fri Nov 17, 2017 7:24 pm Post subject: |
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papasito wrote:
Oldhand
As you sure know, can do that:
1- Put the lens in front of a light source (window can be used)
2- You can stay in front of the lens, so you can see only the front of it.
2- Close the aperture ring to the minimun.
3- See how many reflexions of the frontal part are there
4- 6 Reflexions: a 6/5 formula lens (AFAIK, the best one)
5- 5 Reflexions: 6/4 formula lens (very good one too) |
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Oldhand
Joined: 01 Apr 2013 Posts: 6006 Location: Mid North Coast NSW - Australia
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Posted: Fri Nov 17, 2017 8:13 pm Post subject: |
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Oldhand wrote:
papasito wrote: |
Oldhand
As you sure know, can do that:
1- Put the lens in front of a light source (window can be used)
2- You can stay in front of the lens, so you can see only the front of it.
2- Close the aperture ring to the minimun.
3- See how many reflexions of the frontal part are there
4- 6 Reflexions: a 6/5 formula lens (AFAIK, the best one)
5- 5 Reflexions: 6/4 formula lens (very good one too) |
Thank you papasito.
If I am counting correctly it has six reflections, but it is the same as Wolfgang's lens shown above in his post.
Cheers
Tom |
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papasito
Joined: 09 Jan 2015 Posts: 1658
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Posted: Fri Nov 17, 2017 9:18 pm Post subject: |
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papasito wrote:
Wolfgang's lens is an chromer aperture ring, so a TL lens.
If you want to and can do, should post an image with the 6 reflexions. It will be very informative for the mamiya history.
Note that some papers do not say nothing about the last DTL lens with the 6/5 formula.
A lot more can be ignorated about that lens. |
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Oldhand
Joined: 01 Apr 2013 Posts: 6006 Location: Mid North Coast NSW - Australia
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Posted: Sat Nov 18, 2017 4:17 am Post subject: |
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Oldhand wrote:
papasito wrote: |
Wolfgang's lens is an chromer aperture ring, so a TL lens.
If you want to and can do, should post an image with the 6 reflexions. It will be very informative for the mamiya history.
Note that some papers do not say nothing about the last DTL lens with the 6/5 formula.
A lot more can be ignorated about that lens. |
OK, here are some pictures of the lens.
#1
Aperture open
#2
Aperture closed
#3
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DCS
Joined: 22 Jun 2018 Posts: 11 Location: Oregon
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Posted: Thu Mar 07, 2019 1:22 am Post subject: |
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DCS wrote:
I'm curious, what is the interpretation from oldhand's images posted above?
I understand that the elements and groups cause reflections, therefore the number of visible reflections should indicate lens structure.
But this thread seems to simply stop without a acknowledging the images posted above.
If a 55/1.8 is a 6/4, are there two groups in front of the aperture and two groups behind it?
If a 55/1.8 is a 6/5, are there three groups in front of aperture and two behind?
If that's how it works, then oldhand's chrome-nose seems to be a 6/5 because it shows three groups in front of the aperture. Is that correct?
I'm just trying to fully understand.
Also, while reading about this subject, I found various vintage DTL advertisements and manuals that all show the DTL with chrome-nose lenses, so I am not so sure that chrome must be TL and black must be DTL. Is it possible that chrome-nose lenses extended into the DTL series?
I'm not sure I grasp the concept that a certain few 'late model' all-black DTL 55/1.8's have a fortunate 6/5 configuration but the rest do not.
M/S changed lens and camera designs much more often for SLR cameras than did any other maker.
It seems strange that they would have complicated matters further by also changing internal glass arrangements mid-series.
As a relative newcomer, I have much to learn, but I wouldn't mind seeing photographic evidence that some DTL black 55/1.8 lenses had a different glass configuration than others.
Lastly, SX lenses are much lighter than DTL lenses. Does this further complicate the suggestion that late DTL black 55's had an SX glass arrangement.
Not trying to stir a pot, just looking for concrete information.
Thanks! |
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Oldhand
Joined: 01 Apr 2013 Posts: 6006 Location: Mid North Coast NSW - Australia
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Posted: Thu Mar 07, 2019 1:50 am Post subject: |
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Oldhand wrote:
Yes, it would appear to me that the six reflections indicate three groups in front.
I cannot understand how five reflections can exist - I expect that two groups will show four reflections
Tom |
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papasito
Joined: 09 Jan 2015 Posts: 1658
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Posted: Thu Mar 07, 2019 3:22 pm Post subject: |
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papasito wrote:
3 elements in 3 grupos show 6 reflexes
3 elements in 2 grupos show:
A-1 element (the first) only shows 2 reflexes
B-The 2 elements stuck together, show 3 reflexes.
A + B = 5 reflexes |
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DCS
Joined: 22 Jun 2018 Posts: 11 Location: Oregon
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Posted: Thu Mar 07, 2019 6:53 pm Post subject: |
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DCS wrote:
papasito - from oldhand's photographs above, can you say what is the configuration of his lens?
Can you explain more about reflections with aperture-open vs aperture closed?
Thanks.
I can understand the theoretical basis of your comments on this thread, but I still do not understand the practical application.
Maybe it will help if you use his example/
Thanks! I appreciate it. |
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