Re: GESO - Experiments with X-ray optics
That is very interesting. Does the digital sensor record the shorter light wavelengths? I thought they were filtered out similar to IR unless the camera was converted to full spectrum. At any rate - some very cool effects and interesting OOF areas. Mark On 2/25/2013 4:02 AM, Jostein Øksne wrote: - Original Message - From: Aahz Maruch a...@pobox.com The daisies look really sharp, though it's hard to be sure with a small image. It is a very sharp lens, but it's not particularly well corrected (ie. it's not APO). You can see for yourself if you like in this full jpg of a test shot I made this morning, file size around 7 MB: http://www.alunfoto.no/temp/heligon2/20130225-0006-Full.jpg Same setup as the daisies, stopped down to f/11. It has been sharpened in Lightroom. I didn't buy this lens for its sharpness, but it's a nice bonus. I wanted the large aperture and transparency to shorter wavelengths than the eye can see. The bokeh on full opening is amazing, and it renders high-contrast gradients in a very peculiar way. That was particularly visible when used with the 645D, so I'll be looking into options for making a mount for that system too. Btw, I made a GIF animation of the DOF from full opening to f/22, if anyone's interested. http://www.alunfoto.no/temp/heligon2/animasjon.gif (file size around 5 MB) Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
- Original Message - From: Bruce Walker bruce.wal...@gmail.com I like those, especially the third. There's no chance of residual radiation on that thing is there? Thanks Bruce. I believe all the x-ray photons have left the glass a long time ago. :-) Are you thinking about something else? Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
- Original Message - From: Don Guthrie shark50...@gmail.com Still not sure what the technic is. Kinda cool tho. Thanks Don. Put it down to my poor explanation. It's a rather geekish project to begin with. Maybe I shouldn't pester the list with too many details, but I'm happy to try again if you point to where I lost you. :-) Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
- Original Message - From: Aahz Maruch a...@pobox.com The daisies look really sharp, though it's hard to be sure with a small image. It is a very sharp lens, but it's not particularly well corrected (ie. it's not APO). You can see for yourself if you like in this full jpg of a test shot I made this morning, file size around 7 MB: http://www.alunfoto.no/temp/heligon2/20130225-0006-Full.jpg Same setup as the daisies, stopped down to f/11. It has been sharpened in Lightroom. I didn't buy this lens for its sharpness, but it's a nice bonus. I wanted the large aperture and transparency to shorter wavelengths than the eye can see. The bokeh on full opening is amazing, and it renders high-contrast gradients in a very peculiar way. That was particularly visible when used with the 645D, so I'll be looking into options for making a mount for that system too. Btw, I made a GIF animation of the DOF from full opening to f/22, if anyone's interested. http://www.alunfoto.no/temp/heligon2/animasjon.gif (file size around 5 MB) Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
- Original Message - From: Daniel J. Matyola danmaty...@gmail.com Quite interesting! Thanks Dan! :-) Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
- Original Message - From: Ann Sanfedele ann...@nyc.rr.com I really like that first one... like a Turneresque painting and nice geometry too. Not crazy about the other two... looks like you're having fun :-) I'm having a lot of fun with this. :-) I agree on your pick, there's something special about how the image is rendered through this lens that seems to come more to its right when used on full opening. Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
On Mon, Feb 25, 2013 at 3:41 AM, Jostein Øksne p...@alunfoto.no wrote: - Original Message - From: Bruce Walker bruce.wal...@gmail.com I like those, especially the third. There's no chance of residual radiation on that thing is there? Thanks Bruce. I believe all the x-ray photons have left the glass a long time ago. :-) Are you thinking about something else? I was having a duh moment which a quick trip to Wikipedia fixed. Never mind. :-) -- -bmw -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
On Mon, Feb 25, 2013, Jostein ?ksne wrote: - Original Message - From: Aahz Maruch a...@pobox.com The daisies look really sharp, though it's hard to be sure with a small image. Btw, I made a GIF animation of the DOF from full opening to f/22, if anyone's interested. http://www.alunfoto.no/temp/heligon2/animasjon.gif (file size around 5 MB) Nice! That really shows the effect! -- Hugs and backrubs -- I break Rule 6http://rule6.info/ * * * Help a hearing-impaired person: http://rule6.info/hearing.html -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
GESO - Experiments with X-ray optics
http://www.alunfoto.no/temp/heligontest/index.html I have purchased an old optic from an X-ray machine, a Rodenstock 100mm f/1.6. First I tried it on the 645D, just holding it before the bayonet to see if there was any vignetting. There wasn't! So the image circle is quite decent. The image of the rotten plant is shot with this combo. I think the OOF rendering is quite interesting and look forward to play more with this setup. Then I scavenged an old and broken Pentax-A 50mm f/1.7. I picked out all the optical elements and mounted the Rodenstock into the focusing helicoid using generous amounts of gaffatape. The other two images are produced with this setup. The jesus-light image at f/2.8, the daisies at f/8. To have the iris behind all the optical elements like this is probably all wrong from a theoretical perspective, and the true size of the aperture is probably not as advertised. Yet I must say I like the results. As the jesus-light image shows, the lens comes with an odd compliment of internal reflections. I believe it can be used to good effect on occasion. Cheers, Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
Simpleviewer requires flash. Can't see the gallery on my iPad. : ( -p Sent from my iPad On Feb 24, 2013, at 10:25 AM, Jostein Øksne p...@alunfoto.no wrote: http://www.alunfoto.no/temp/heligontest/index.html I have purchased an old optic from an X-ray machine, a Rodenstock 100mm f/1.6. First I tried it on the 645D, just holding it before the bayonet to see if there was any vignetting. There wasn't! So the image circle is quite decent. The image of the rotten plant is shot with this combo. I think the OOF rendering is quite interesting and look forward to play more with this setup. Then I scavenged an old and broken Pentax-A 50mm f/1.7. I picked out all the optical elements and mounted the Rodenstock into the focusing helicoid using generous amounts of gaffatape. The other two images are produced with this setup. The jesus-light image at f/2.8, the daisies at f/8. To have the iris behind all the optical elements like this is probably all wrong from a theoretical perspective, and the true size of the aperture is probably not as advertised. Yet I must say I like the results. As the jesus-light image shows, the lens comes with an odd compliment of internal reflections. I believe it can be used to good effect on occasion. Cheers, Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
- Original Message - From: Paul Sorenson pentax1...@gmail.com Simpleviewer requires flash. Can't see the gallery on my iPad. : ( Try this then: http://www.alunfoto.no/temp/heligon2/index.html -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
I really like that first one... like a Turneresque painting and nice geometry too. Not crazy about the other two... looks like you're having fun :-) ann On 2/24/2013 11:25, Jostein Øksne wrote: http://www.alunfoto.no/temp/heligontest/index.html I have purchased an old optic from an X-ray machine, a Rodenstock 100mm f/1.6. First I tried it on the 645D, just holding it before the bayonet to see if there was any vignetting. There wasn't! So the image circle is quite decent. The image of the rotten plant is shot with this combo. I think the OOF rendering is quite interesting and look forward to play more with this setup. Then I scavenged an old and broken Pentax-A 50mm f/1.7. I picked out all the optical elements and mounted the Rodenstock into the focusing helicoid using generous amounts of gaffatape. The other two images are produced with this setup. The jesus-light image at f/2.8, the daisies at f/8. To have the iris behind all the optical elements like this is probably all wrong from a theoretical perspective, and the true size of the aperture is probably not as advertised. Yet I must say I like the results. As the jesus-light image shows, the lens comes with an odd compliment of internal reflections. I believe it can be used to good effect on occasion. Cheers, Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
I like those, especially the third. There's no chance of residual radiation on that thing is there? On Sun, Feb 24, 2013 at 11:25 AM, Jostein Øksne p...@alunfoto.no wrote: http://www.alunfoto.no/temp/heligontest/index.html I have purchased an old optic from an X-ray machine, a Rodenstock 100mm f/1.6. First I tried it on the 645D, just holding it before the bayonet to see if there was any vignetting. There wasn't! So the image circle is quite decent. The image of the rotten plant is shot with this combo. I think the OOF rendering is quite interesting and look forward to play more with this setup. Then I scavenged an old and broken Pentax-A 50mm f/1.7. I picked out all the optical elements and mounted the Rodenstock into the focusing helicoid using generous amounts of gaffatape. The other two images are produced with this setup. The jesus-light image at f/2.8, the daisies at f/8. To have the iris behind all the optical elements like this is probably all wrong from a theoretical perspective, and the true size of the aperture is probably not as advertised. Yet I must say I like the results. As the jesus-light image shows, the lens comes with an odd compliment of internal reflections. I believe it can be used to good effect on occasion. Cheers, Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- -bmw -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
Still not sure what the technic is. Kinda cool tho. pdml-requ...@pdml.net wrote: Message: 1 Date: Sun, 24 Feb 2013 21:16:33 +0100 From: Jostein ?ksnep...@alunfoto.no To: Pentax-Discuss Mail Listpdml@pdml.net Subject: Re: GESO - Experiments with X-ray optics Message-ID: 51521524576D4CCB9EAA26531A8B4379@MozartTx Content-Type: text/plain; format=flowed; charset=utf-8; reply-type=original - Original Message - From: Paul Sorensonpentax1...@gmail.com Simpleviewer requires flash. Can't see the gallery on my iPad. : ( Try this then: http://www.alunfoto.no/temp/heligon2/index.html -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
On Sun, Feb 24, 2013, Jostein ?ksne wrote: http://www.alunfoto.no/temp/heligontest/index.html Then I scavenged an old and broken Pentax-A 50mm f/1.7. I picked out all the optical elements and mounted the Rodenstock into the focusing helicoid using generous amounts of gaffatape. The other two images are produced with this setup. The jesus-light image at f/2.8, the daisies at f/8. The daisies look really sharp, though it's hard to be sure with a small image. -- Hugs and backrubs -- I break Rule 6http://rule6.info/ * * * Help a hearing-impaired person: http://rule6.info/hearing.html -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: GESO - Experiments with X-ray optics
Quite interesting! Dan Matyola http://www.pentaxphotogallery.com/danieljmatyola On Sun, Feb 24, 2013 at 11:25 AM, Jostein Øksne p...@alunfoto.no wrote: http://www.alunfoto.no/temp/heligontest/index.html I have purchased an old optic from an X-ray machine, a Rodenstock 100mm f/1.6. First I tried it on the 645D, just holding it before the bayonet to see if there was any vignetting. There wasn't! So the image circle is quite decent. The image of the rotten plant is shot with this combo. I think the OOF rendering is quite interesting and look forward to play more with this setup. Then I scavenged an old and broken Pentax-A 50mm f/1.7. I picked out all the optical elements and mounted the Rodenstock into the focusing helicoid using generous amounts of gaffatape. The other two images are produced with this setup. The jesus-light image at f/2.8, the daisies at f/8. To have the iris behind all the optical elements like this is probably all wrong from a theoretical perspective, and the true size of the aperture is probably not as advertised. Yet I must say I like the results. As the jesus-light image shows, the lens comes with an odd compliment of internal reflections. I believe it can be used to good effect on occasion. Cheers, Jostein -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
