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lumens pixel
Joined: 27 Feb 2019 Posts: 821
Expire: 2021-06-25
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Posted: Mon Aug 26, 2019 11:55 am Post subject: Minolta Rokkor 28mm 2,5 SI |
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lumens pixel wrote:
This is a fantastic lens.
[url]Les jeunes de la Défense by lumens pixel, sur Flickr[/url] _________________ Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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Lightshow
Joined: 04 Nov 2011 Posts: 3669 Location: Calgary
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Posted: Tue Aug 27, 2019 8:45 pm Post subject: |
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Lightshow wrote:
It is a very under rated lens, one of my best 28's, costs 1/5 of what my next best 28mm lens. _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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Lloydy
Joined: 02 Sep 2009 Posts: 7775 Location: Ironbridge. UK.
Expire: 2022-01-01
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Posted: Tue Aug 27, 2019 9:28 pm Post subject: |
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Lloydy wrote:
Great image, and a great lens as well. _________________ LENSES & CAMERAS FOR SALE.....
I have loads of stuff that I have to get rid of, if you see me commenting about something I have got and you want one, ask me.
My Flickr https://www.flickr.com/photos/mudplugga/
My ipernity -
http://www.ipernity.com/home/294337 |
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Focusthrow
Joined: 12 Sep 2017 Posts: 209
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Posted: Wed Aug 28, 2019 1:43 am Post subject: |
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Focusthrow wrote:
Yes, the 28mm 2.5 returns a lot of quality for relatively little$$. Nice lens and nice pic there. Best, jt _________________ Sabbapāpassa akaraṇaṃ kusalassa upasampadā
Sacittapariyodapanaṃ etaṃ buddhāna sāsanaṃ. DHP |
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lumens pixel
Joined: 27 Feb 2019 Posts: 821
Expire: 2021-06-25
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Posted: Wed Aug 28, 2019 7:04 pm Post subject: |
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lumens pixel wrote:
This lens spent three months under an Ikea lamp to cure yellowing. Well worth this little effort. _________________ Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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cbass
Joined: 27 Jul 2019 Posts: 436
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Posted: Thu Aug 29, 2019 3:12 pm Post subject: |
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cbass wrote:
There doesn’t seem to be much info out there about this lens. Do you have anymore sample pictures? |
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lumens pixel
Joined: 27 Feb 2019 Posts: 821
Expire: 2021-06-25
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Posted: Thu Aug 29, 2019 5:17 pm Post subject: |
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lumens pixel wrote:
Some info here:
http://forum.mflenses.com/all-eight-minolta-28mm-rokkor-computations-compared-t77162,highlight,%2Bminolta+%2Brokkor+%2B28mm+%2B2+%2B5.html
My copy of the 2,5 after curing yellowing seems better than what i see there. _________________ Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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lumens pixel
Joined: 27 Feb 2019 Posts: 821
Expire: 2021-06-25
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Posted: Thu Aug 29, 2019 5:23 pm Post subject: |
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lumens pixel wrote:
Some pics:
[url][/url]Printemps by lumens pixel, sur Flickr[/url]
And these last two fully opened:
[url][/url]Tunnel by lumens pixel, sur Flickr[/url]
[url][/url]Dans la boîte | In the box by lumens pixel, sur Flickr[/url] _________________ Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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cbass
Joined: 27 Jul 2019 Posts: 436
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Posted: Thu Aug 29, 2019 7:00 pm Post subject: |
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cbass wrote:
Thank you. I just picked one up. It was pretty cheap so worth trying.
The flower picture seems to have a good amount of CA though. |
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lumens pixel
Joined: 27 Feb 2019 Posts: 821
Expire: 2021-06-25
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Posted: Thu Aug 29, 2019 8:12 pm Post subject: |
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lumens pixel wrote:
Glad you bought one.
I do not see any fringing. By the way these flowers were not purely white _________________ Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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Lightshow
Joined: 04 Nov 2011 Posts: 3669 Location: Calgary
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Posted: Fri Aug 30, 2019 12:49 am Post subject: |
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Lightshow wrote:
I don't see any CA in the flower picture. _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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cbass
Joined: 27 Jul 2019 Posts: 436
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Posted: Sat Aug 31, 2019 3:38 am Post subject: |
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cbass wrote:
Did you have to deyellow yours? If so, then how did you deyellow it? |
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cbass
Joined: 27 Jul 2019 Posts: 436
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Posted: Fri Sep 06, 2019 10:27 pm Post subject: |
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cbass wrote:
Updating this for others just in case they come upon this thread in the future.
De-yellowing this lens is super simple. I have a small UV led flashlight that I use to hunt scorpions.
The flashlight has a flat surface that rests perfectly on the metal around the rear element without touching the glass.
I put a down a piece of aluminum foil, put the front of the lens down on the foil then put the flashlight on the metal around the rear element.
A couple of hours and the yellow cast is gone. No disassembly required. Please let me know if pictures would help.
I bought my flashlight long ago, so not this one, but looks exactly like this light:
https://www.amazon.com/Flashlight-Portable-Ultraviolet-Detector-Batteries/dp/B00GU55270/ref=sr_1_7?keywords=uv+flash&qid=1567808180&s=sporting-goods&sr=1-7
I tried to use the same method with my Carl Zeiss Jena Pancolar 50 f/1.8.
On that lens this had no effect. That Zeiss is as yellow as it started and I have had that UV light on there for days.
Not sure what I am going to do about that lens. |
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blotafton
Joined: 08 Aug 2013 Posts: 1534 Location: Sweden
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Posted: Fri Sep 06, 2019 10:52 pm Post subject: |
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blotafton wrote:
cbass wrote: |
Updating this for others just in case they come upon this thread in the future.
De-yellowing this lens is super simple. I have a small UV led flashlight that I use to hunt scorpions.
The flashlight has a flat surface that rests perfectly on the metal around the rear element without touching the glass.
I put a down a piece of aluminum foil, put the front of the lens down on the foil then put the flashlight on the metal around the rear element.
A couple of hours and the yellow cast is gone. No disassembly required. Please let me know if pictures would help.
I bought my flashlight long ago, so not this one, but looks exactly like this light:
https://www.amazon.com/Flashlight-Portable-Ultraviolet-Detector-Batteries/dp/B00GU55270/ref=sr_1_7?keywords=uv+flash&qid=1567808180&s=sporting-goods&sr=1-7
I tried to use the same method with my Carl Zeiss Jena Pancolar 50 f/1.8.
On that lens this had no effect. That Zeiss is as yellow as it started and I have had that UV light on there for days.
Not sure what I am going to do about that lens. |
3 weeks of LED from an IKEA (Jansjö) helped on mine. |
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cbass
Joined: 27 Jul 2019 Posts: 436
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Posted: Sat Sep 07, 2019 1:00 am Post subject: |
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cbass wrote:
Ikea lamp on a pancolar? |
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blotafton
Joined: 08 Aug 2013 Posts: 1534 Location: Sweden
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Posted: Sat Sep 07, 2019 10:00 pm Post subject: |
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blotafton wrote:
Yes, I can post results in a new thread.
#1
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cbass
Joined: 27 Jul 2019 Posts: 436
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Posted: Fri Sep 13, 2019 1:44 am Post subject: |
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cbass wrote:
Thank you for the info. I am trying that on my Pancolar right now. |
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Mr.Bittacy
Joined: 16 Jun 2019 Posts: 76
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Posted: Fri Sep 13, 2019 4:53 am Post subject: |
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Mr.Bittacy wrote:
I have had good luck with a cheap LED UV light bulb used for indoor plants. I just put it in a normal light fixture a little above the lens I was treating. I used it it to de yellow a Minolta 28mm 2.5 and 58mm 1.2 in just a couple days, the extra power probably helped to speed it up. |
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Lloydy
Joined: 02 Sep 2009 Posts: 7775 Location: Ironbridge. UK.
Expire: 2022-01-01
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Posted: Fri Sep 13, 2019 10:05 am Post subject: |
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Lloydy wrote:
Do 'em in bulk!
I got this UV lightbox at a radio ham fair, apparently it was used to cure electronic components encased in resin whatever....it only cost me £5 and works just fine.
_________________ LENSES & CAMERAS FOR SALE.....
I have loads of stuff that I have to get rid of, if you see me commenting about something I have got and you want one, ask me.
My Flickr https://www.flickr.com/photos/mudplugga/
My ipernity -
http://www.ipernity.com/home/294337 |
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lumens pixel
Joined: 27 Feb 2019 Posts: 821
Expire: 2021-06-25
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Posted: Wed May 27, 2020 7:51 pm Post subject: 28mm Rokkor SI strikes back |
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lumens pixel wrote:
Who said you cannot use wide angle lenses for portrait?
Zeiss? Bokeh and all? 3D? Separation?
It is all yours.
[img][/url]Beauté noire adaptée au Covid | Covid adapted black beauty by lumens pixel, sur Flickr[/img] _________________ Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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caspert79
Joined: 31 Oct 2010 Posts: 2901 Location: The Netherlands
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Posted: Fri Jun 05, 2020 7:49 pm Post subject: |
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caspert79 wrote:
Awesome picture the last one! |
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