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memetph
Joined: 01 Dec 2013 Posts: 940 Location: Poland
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Posted: Mon Mar 03, 2014 3:03 pm Post subject: |
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memetph wrote:
This lens has nothing to do with a Tessar design.
A Tessar has 4 elements in 3 groups. The last group is the only group.
Where did you get this information about the SMC coating which would not apply to the front lens? Don't you confuse with radioctivity due to Thorium on the rear element of some Super Tak.
The information I had is that some Super Tak have already the multicoating without being marketed as SMC: some Super Tak are not single coated. The Tak are single coated. |
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MacTak
Joined: 15 Jun 2011 Posts: 108
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Posted: Wed Mar 05, 2014 11:33 am Post subject: |
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MacTak wrote:
memetph wrote: |
This lens has nothing to do with a Tessar design.
A Tessar has 4 elements in 3 groups. The last group is the only group.
Where did you get this information about the SMC coating which would not apply to the front lens? Don't you confuse with radioctivity due to Thorium on the rear element of some Super Tak.
The information I had is that some Super Tak have already the multicoating without being marketed as SMC: some Super Tak are not single coated. The Tak are single coated. |
First off, as to the design I said it was Tessar-based. If you look at an optical diagram, you will see that this lens is unmistakably a Tessar with the addition of a strong negative element at the front. As to the SMC coating, that comes from Gerjan van Oosten's book (The Ultimate Asahi Pentax Screwmount Guide); he is the expert, and so I would consider his information (which is specific to this lens and this lens only--my suspicion being that the early SMC could not properly coat such a strongly curved element) authoritative. |
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memetph
Joined: 01 Dec 2013 Posts: 940 Location: Poland
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Posted: Wed Mar 05, 2014 1:11 pm Post subject: |
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memetph wrote:
I did not understand that the coating issue was limited to this lens.
About the Tessar design , I have always seen it in relation with 3 elements design the last being replaced by a group ( Novar vs Tessar) . But I am not an optic ingineer. |
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fikkser
Joined: 09 Aug 2014 Posts: 22 Location: Sweden
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Posted: Wed Oct 01, 2014 6:08 pm Post subject: |
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fikkser wrote:
As far as I've heard, think it's from asahiflex on pentaxforums. The SMC 35 has one layer of the modern SMC coating. It looks like it has the modern coating on mine at least, older coatings have another color. _________________ Pentaxian |
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alex ph
Joined: 16 Mar 2013 Posts: 1674
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Posted: Thu Oct 10, 2019 9:52 am Post subject: |
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alex ph wrote:
Updating the thread with some more shots taken with the lens on Nex, f3.5-f5.6.
#1
#2 A 100% unprocessed crop from the previous
#3
#4
#5
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Sciolist
Joined: 29 Mar 2017 Posts: 1445 Location: Scotland
Expire: 2021-04-16
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Posted: Thu Oct 10, 2019 10:50 am Post subject: |
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Sciolist wrote:
^^ Very crisp shots alex . One of my favourite lenses. |
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Oldhand
Joined: 01 Apr 2013 Posts: 6005 Location: Mid North Coast NSW - Australia
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Posted: Thu Oct 10, 2019 11:41 am Post subject: |
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Oldhand wrote:
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papasito
Joined: 09 Jan 2015 Posts: 1662
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Posted: Thu Oct 10, 2019 1:22 pm Post subject: |
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papasito wrote:
Very nice pics, of course.
How do you compare the 3,5/35 Pentax and the Minolta MD 2,8/35?
Both very good lenses, I guess.
Which to buy? |
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jamaeolus
Joined: 19 Mar 2014 Posts: 2965 Location: Eugene
Expire: 2015-08-20
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Posted: Thu Oct 10, 2019 4:08 pm Post subject: |
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jamaeolus wrote:
The popular meme is, of course, "Why not both? Both is good!" _________________ photos are moments frozen in time |
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alex ph
Joined: 16 Mar 2013 Posts: 1674
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Posted: Thu Oct 10, 2019 5:35 pm Post subject: |
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alex ph wrote:
Sciolist, Oldhand, Papasito, thank you for your appreciation!
I don't have a 35mm Minolta, only a 3.5/28 which is also very sharp with great microcontrast. It could be an interesting test to do, even though not a purist one. |
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papasito
Joined: 09 Jan 2015 Posts: 1662
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Posted: Thu Oct 10, 2019 6:01 pm Post subject: |
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papasito wrote:
jamaeolus wrote: |
The popular meme is, of course, "Why not both? Both is good!" |
Why?
Well. I'm fighting with myself. Want yo hace only one lens wide angle, one normal and one short tele.
No more a lot of lenses |
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stevemark
Joined: 29 Apr 2011 Posts: 4020 Location: Switzerland
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Posted: Thu Oct 10, 2019 8:03 pm Post subject: |
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stevemark wrote:
papasito wrote: |
Very nice pics, of course.
How do you compare the 3,5/35 Pentax and the Minolta MD 2,8/35?
Both very good lenses, I guess.
Which to buy? |
If you want to use them for landscape images, i can make a quite comparison, but only next Tue or Wed (i'm not at home at the moment). Don't hesitate to remind me via PM if i should forget it!!
S _________________ www.artaphot.ch |
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papasito
Joined: 09 Jan 2015 Posts: 1662
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Posted: Thu Oct 10, 2019 8:39 pm Post subject: |
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papasito wrote:
stevemark wrote: |
papasito wrote: |
Very nice pics, of course.
How do you compare the 3,5/35 Pentax and the Minolta MD 2,8/35?
Both very good lenses, I guess.
Which to buy? |
If you want to use them for landscape images, i can make a quite comparison, but only next Tue or Wed (i'm not at home at the moment). Don't hesitate to remind me via PM if i should forget it!!
S |
Ohhhh.
Thank you,, very much.
Of course, the landscapes are in the center of my interest. |
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alex ph
Joined: 16 Mar 2013 Posts: 1674
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Posted: Mon Oct 14, 2019 11:09 pm Post subject: |
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alex ph wrote:
A close up converted in black and white, at around f4 (the lens has two intermediate clicks between f3.5 and f5.6)
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