Re: GESO - Experiments with X-ray optics

2013-03-01 Thread Mark C
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

Re: GESO - Experiments with X-ray optics

2013-02-25 Thread Jostein Øksne
- 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

Re: GESO - Experiments with X-ray optics

2013-02-25 Thread Jostein Øksne
- 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

Re: GESO - Experiments with X-ray optics

2013-02-25 Thread Jostein Øksne
- 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

Re: GESO - Experiments with X-ray optics

2013-02-25 Thread Jostein Øksne
- 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

Re: GESO - Experiments with X-ray optics

2013-02-25 Thread Jostein Øksne
- 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

Re: GESO - Experiments with X-ray optics

2013-02-25 Thread Bruce Walker
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

Re: GESO - Experiments with X-ray optics

2013-02-25 Thread Aahz Maruch
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.

GESO - Experiments with X-ray optics

2013-02-24 Thread Jostein Øksne
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

Re: GESO - Experiments with X-ray optics

2013-02-24 Thread Paul Sorenson
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.

Re: GESO - Experiments with X-ray optics

2013-02-24 Thread Jostein Øksne
- 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

Re: GESO - Experiments with X-ray optics

2013-02-24 Thread Ann Sanfedele
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

Re: GESO - Experiments with X-ray optics

2013-02-24 Thread Bruce Walker
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

Re: GESO - Experiments with X-ray optics

2013-02-24 Thread Don Guthrie
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

Re: GESO - Experiments with X-ray optics

2013-02-24 Thread Aahz Maruch
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

Re: GESO - Experiments with X-ray optics

2013-02-24 Thread Daniel J. Matyola
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