View previous topic :: View next topic |
Author |
Message |
Opticus
Joined: 16 Jan 2012 Posts: 73
|
Posted: Sat Nov 07, 2015 8:13 am Post subject: JML 64mm f/0.85 Full Frame lens |
|
|
Opticus wrote:
--
Last edited by Opticus on Sun Aug 21, 2016 7:22 pm; edited 1 time in total |
|
Back to top |
|
|
Raxar
Joined: 25 Mar 2014 Posts: 226
|
Posted: Sat Nov 07, 2015 8:57 am Post subject: |
|
|
Raxar wrote:
x-ray lens has very short FFD and they are usually super fast. |
|
Back to top |
|
|
iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
|
Posted: Sat Nov 07, 2015 9:19 am Post subject: |
|
|
iangreenhalgh1 wrote:
It will be for capturing the image on a low intensity CRT, which means it is likely from an X-ray system.
Back focus on the Rodenstock XR and TV Heligons is 6-7mm, so this one is probably similar, hence no infinity on an A7. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
|
Back to top |
|
|
Opticus
Joined: 16 Jan 2012 Posts: 73
|
Posted: Sat Nov 07, 2015 10:29 am Post subject: |
|
|
Opticus wrote:
--
Last edited by Opticus on Sun Aug 21, 2016 7:23 pm; edited 1 time in total |
|
Back to top |
|
|
imagedit
Joined: 17 May 2014 Posts: 92 Location: London, england
|
Posted: Sat Nov 07, 2015 12:34 pm Post subject: |
|
|
imagedit wrote:
Can you not shave a bit off the bottom of the housing? _________________ My Flickr |
|
Back to top |
|
|
luisalegria
Joined: 07 Mar 2008 Posts: 6602 Location: San Francisco, USA
Expire: 2018-01-18
|
Posted: Sat Nov 07, 2015 4:34 pm Post subject: |
|
|
luisalegria wrote:
Many lenses at extreme close-up will cover ff. Coverage should be checked at infinity.
I was trying some 8mm cine lenses once, mounted on PK lens caps, and they covered both APS-C and FF. Of course, they would only focus extremely close. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
|
Back to top |
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16663 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Sun Nov 08, 2015 9:17 am Post subject: |
|
|
kds315* wrote:
Saw that on enay a few days ago....
Xray lens _________________ Klaus - Admin
"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
https://www.flickr.com/photos/kds315/albums my albums using various lenses
http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
http://www.travelmeetsfood.com/blog Food + Travel BLOG
https://galeriafotografia.com Architecture + Drone photography
Currently most FAV lens(es):
X80QF f3.2/80mm
Hypergon f11/26mm
ELCAN UV f5.6/52mm
Zeiss UV-Planar f4/60mm
Zeiss UV-Planar f2/62mm
Lomo Уфар-12 f2.5/41mm
Lomo Зуфар-2 f4.0/350mm
Lomo ZIKAR-1A f1.2/100mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f1.8/45mm
CERCO UV-VIS-NIR f4.1/94mm
CERCO UV-VIS-NIR f2.8/100mm
Steinheil Quarzobjektiv f1.8/50mm
Pentax Quartz Takumar f3.5/85mm
Carl Zeiss Jena UV-Objektiv f4/60mm
NYE OPTICAL Lyman-Alpha II f1.1/90mm
NYE OPTICAL Lyman-Alpha I f2.8/200mm
COASTAL OPTICS f4/60mm UV-VIS-IR Apo
COASTAL OPTICS f4.5/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm
|
|
Back to top |
|
|
Pancolart
Joined: 04 Feb 2008 Posts: 3705 Location: Slovenia, EU
Expire: 2013-11-18
|
Posted: Sun Nov 08, 2015 10:43 am Post subject: |
|
|
Pancolart wrote:
Perhaps rear condenser was taken off thus the bigger projected image. _________________ ---------------------------------
The Peculiar Apparatus Of Victorian Steampunk Photography: 100+ Genuine Steampunk Camera Designs https://www.amazon.com/dp/B0B92829NS |
|
Back to top |
|
|
Opticus
Joined: 16 Jan 2012 Posts: 73
|
Posted: Sun Nov 08, 2015 10:54 am Post subject: |
|
|
Opticus wrote:
--
Last edited by Opticus on Sun Aug 21, 2016 7:23 pm; edited 1 time in total |
|
Back to top |
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16663 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Sun Nov 08, 2015 10:58 am Post subject: |
|
|
kds315* wrote:
Looks very nice and the large image circle is great!! _________________ Klaus - Admin
"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
https://www.flickr.com/photos/kds315/albums my albums using various lenses
http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
http://www.travelmeetsfood.com/blog Food + Travel BLOG
https://galeriafotografia.com Architecture + Drone photography
Currently most FAV lens(es):
X80QF f3.2/80mm
Hypergon f11/26mm
ELCAN UV f5.6/52mm
Zeiss UV-Planar f4/60mm
Zeiss UV-Planar f2/62mm
Lomo Уфар-12 f2.5/41mm
Lomo Зуфар-2 f4.0/350mm
Lomo ZIKAR-1A f1.2/100mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f1.8/45mm
CERCO UV-VIS-NIR f4.1/94mm
CERCO UV-VIS-NIR f2.8/100mm
Steinheil Quarzobjektiv f1.8/50mm
Pentax Quartz Takumar f3.5/85mm
Carl Zeiss Jena UV-Objektiv f4/60mm
NYE OPTICAL Lyman-Alpha II f1.1/90mm
NYE OPTICAL Lyman-Alpha I f2.8/200mm
COASTAL OPTICS f4/60mm UV-VIS-IR Apo
COASTAL OPTICS f4.5/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm
|
|
Back to top |
|
|
iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
|
Posted: Sun Nov 08, 2015 12:03 pm Post subject: |
|
|
iangreenhalgh1 wrote:
Don't modify the A7, you might destroy it, certainly you will destroy it's value.
You can place a negative dioptre in front of the lens to increase the rear focal distance. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
|
Back to top |
|
|
Opticus
Joined: 16 Jan 2012 Posts: 73
|
Posted: Sun Nov 08, 2015 12:23 pm Post subject: |
|
|
Opticus wrote:
Thanks for the tip. Does a negative dioptre affect image quality much? |
|
Back to top |
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16663 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Sun Nov 08, 2015 12:31 pm Post subject: |
|
|
kds315* wrote:
It might introduce CA. BUt the lens has much of it anyway....
The cost of such a large one might be considerable and not easy to find.
Negantive diopters are rather rare. _________________ Klaus - Admin
"S'il vient a point, me souviendra" [Thomas Bohier (1460-1523)]
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
https://www.flickr.com/photos/kds315/albums my albums using various lenses
http://photographyoftheinvisibleworld.blogspot.com/ my UV BLOG
http://www.travelmeetsfood.com/blog Food + Travel BLOG
https://galeriafotografia.com Architecture + Drone photography
Currently most FAV lens(es):
X80QF f3.2/80mm
Hypergon f11/26mm
ELCAN UV f5.6/52mm
Zeiss UV-Planar f4/60mm
Zeiss UV-Planar f2/62mm
Lomo Уфар-12 f2.5/41mm
Lomo Зуфар-2 f4.0/350mm
Lomo ZIKAR-1A f1.2/100mm
Nikon UV Nikkor f4.5/105mm
Zeiss UV-Sonnar f4.3/105mm
CERCO UV-VIS-NIR f1.8/45mm
CERCO UV-VIS-NIR f4.1/94mm
CERCO UV-VIS-NIR f2.8/100mm
Steinheil Quarzobjektiv f1.8/50mm
Pentax Quartz Takumar f3.5/85mm
Carl Zeiss Jena UV-Objektiv f4/60mm
NYE OPTICAL Lyman-Alpha II f1.1/90mm
NYE OPTICAL Lyman-Alpha I f2.8/200mm
COASTAL OPTICS f4/60mm UV-VIS-IR Apo
COASTAL OPTICS f4.5/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm
|
|
Back to top |
|
|
MaXXXic
Joined: 03 Jun 2015 Posts: 78 Location: Ukraine
|
Posted: Sun Nov 08, 2015 2:36 pm Post subject: |
|
|
MaXXXic wrote:
First of all, check the lens for radiation!!! |
|
Back to top |
|
|
iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
|
Posted: Sun Nov 08, 2015 6:24 pm Post subject: |
|
|
iangreenhalgh1 wrote:
I successfully added a -3 diopter to the front of a Cine-Xenon and it hasn't degraded the IQ in any way that I can discern.
I found the diopter on ebay, 50mm diameter, in the Scientific category are lots of different types of lenses:
http://www.ebay.co.uk/itm/Double-concave-lens-50mm-x-200mm-focal-Length-Magnifying-Negative-or-Diverging-/321305459373?hash=item4acf4c3aad:m:mLsd2g9OkVMN_KQYehqKHMg
Larger ones can be tricky to find, but this place is likely to have something suitable:
surplusshed.com _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
|
Back to top |
|
|
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|