View previous topic :: View next topic |
Author |
Message |
dickb
Joined: 04 Apr 2008 Posts: 821
|
Posted: Sun Jun 03, 2018 2:05 pm Post subject: |
|
|
dickb wrote:
It still concerns image circle sizes, so this tangent is totally fine with me. Do you get a larger image circle with this MSC than with other 1,4x teleconverters? When you say full shift coverage, how many mm are we talking?
In the photo with the MSC and the 150 PN it looks like there is a bit of LoCA in the background. Is this also present when using the Printing Nikkor without MSC? Is your 150 PN the earlier version with 62mm threads or the later one with 58mm threads? |
|
Back to top |
|
|
e6filmuser
Joined: 12 Nov 2010 Posts: 566 Location: Reading UK
|
Posted: Sun Jun 03, 2018 2:22 pm Post subject: |
|
|
e6filmuser wrote:
dickb wrote: |
It still concerns image circle sizes, so this tangent is totally fine with me. Do you get a larger image circle with this MSC than with other 1,4x teleconverters? When you say full shift coverage, how many mm are we talking?
In the photo with the MSC and the 150 PN it looks like there is a bit of LoCA in the background. Is this also present when using the Printing Nikkor without MSC? Is your 150 PN the earlier version with 62mm threads or the later one with 58mm threads? |
You don't get a larger image circle with other TCs, just the same circle of a smaller part of the image blown up. The MSC will give 42mm, as opposed to standard 43mm for 35mm film lenses.
I haven't done much with this setup. The MSC corrects common aberrations in wide angle lenses and was never meant to be used with 150mm so it might put a few in! Who wants to shift a 150mm? It was just a way to get around a particular problem, the shift being of no interest here.
The PN images here are to demonstrate how it make the image circle larger, not as a recommended use.
The PN has 62mm threads. _________________ Dedicated to using manual focus lenses with digital. Equiped for photography from macro to panoramic & from ultra-wide to extreme telephoto. Mostly shooting outdoor macro. Experienced entomological taxonomist. Some knowledge of mushrooms. |
|
Back to top |
|
|
dickb
Joined: 04 Apr 2008 Posts: 821
|
Posted: Sun Jun 03, 2018 2:49 pm Post subject: |
|
|
dickb wrote:
e6filmuser wrote: |
You don't get a larger image circle with other TCs, just the same circle of a smaller part of the image blown up. The MSC will give 42mm, as opposed to standard 43mm for 35mm film lenses. |
Like you say, teleconverters blow up the image. If the TC doesn't cause vignetting with baffles or something, the image circle will be larger.
e6filmuser wrote: |
I haven't done much with this setup. The MSC corrects common aberrations in wide angle lenses and was never meant to be used with 150mm so it might put a few in! Who wants to shift a 150mm? It was just a way to get around a particular problem, the shift being of no interest here. |
It is always interesting to use things in ways they weren't intended for. I'm just saying that using a normal 1.4x TC may well give you better results with the 150 PN than the MSC
e6filmuser wrote: |
The PN has 62mm threads. |
So it is the early version with the magnification optimising ring, should be a great performer over a wider magnification range than the later one. |
|
Back to top |
|
|
e6filmuser
Joined: 12 Nov 2010 Posts: 566 Location: Reading UK
|
Posted: Sun Jun 03, 2018 3:09 pm Post subject: |
|
|
e6filmuser wrote:
dickb wrote: |
Like you say, teleconverters blow up the image. If the TC doesn't cause vignetting with baffles or something, the image circle will be larger. |
Yes but it blows up the image from the middle of the lens, giving "normal size" for that part of the image, not a larger than normal one. That would spread the image in the dark areas, outside the frame, effectively losing it in designed-for applications. (I have checked for this on other occasions).
dickb wrote: |
It is always interesting to use things in ways they weren't intended for. I'm just saying that using a normal 1.4x TC may well give you better results with the 150 PN than the MSC |
Yes but not across the whole frame.
e6filmuser wrote: |
The PN has 62mm threads. |
So it is the early version with the magnification optimising ring, should be a great performer over a wider magnification range than the later one.[/quote]
That's right 1:4 to 4:1, ideally not outside 1:2 to 2:1 (full frame). It weighs over 1kg so I don't normally take it on field trips. Its working distance is very long, making framing difficult. _________________ Dedicated to using manual focus lenses with digital. Equiped for photography from macro to panoramic & from ultra-wide to extreme telephoto. Mostly shooting outdoor macro. Experienced entomological taxonomist. Some knowledge of mushrooms. |
|
Back to top |
|
|
e6filmuser
Joined: 12 Nov 2010 Posts: 566 Location: Reading UK
|
Posted: Sun Jun 03, 2018 3:23 pm Post subject: |
|
|
e6filmuser wrote:
This might be of interest. Of:
Schneider-Kreuznach Photographic Enlarging Lenses
APO-Componon HM series.
These are 6-element, 4-group apochromatic enlarger lenses, using high-modulation glass elements,
designed for critical colour rendition and precision industrial applications.
・40mm F2.8
・45mm F4
・60mm F4
・90mm F4.5
・120mm F5.6
・150mm F4
I have the 40mm and the 90mm for macro. The 40 covers 35mm format and the 90 something like 60 x66mm (I can't find the original source at the moment). _________________ Dedicated to using manual focus lenses with digital. Equiped for photography from macro to panoramic & from ultra-wide to extreme telephoto. Mostly shooting outdoor macro. Experienced entomological taxonomist. Some knowledge of mushrooms. |
|
Back to top |
|
|
dickb
Joined: 04 Apr 2008 Posts: 821
|
Posted: Sun Jun 03, 2018 7:16 pm Post subject: |
|
|
dickb wrote:
For enlarger lenses the official literature normally states what size negative they can be used with. This is not always exactly the same as how large the image circle is when the lens is used as a taking lens focussed at infinity. All enlarger lenses I tried so far of 50mm or longer filled the frame of a 24x36mm camera. Shorter focal lengths often show vignetting. That is why I was interested in seeing whether a 40/2.8 focussed at infinity would cover 24x36mm. |
|
Back to top |
|
|
e6filmuser
Joined: 12 Nov 2010 Posts: 566 Location: Reading UK
|
Posted: Sun Jun 03, 2018 7:46 pm Post subject: |
|
|
e6filmuser wrote:
dickb wrote: |
That is why I was interested in seeing whether a 40/2.8 focussed at infinity would cover 24x36mm. |
For anyone who doesn't know, that lens requires 39mm extension for infinity focus on m4/3. _________________ Dedicated to using manual focus lenses with digital. Equiped for photography from macro to panoramic & from ultra-wide to extreme telephoto. Mostly shooting outdoor macro. Experienced entomological taxonomist. Some knowledge of mushrooms. |
|
Back to top |
|
|
dickb
Joined: 04 Apr 2008 Posts: 821
|
Posted: Fri Dec 14, 2018 4:17 pm Post subject: |
|
|
dickb wrote:
And in the series of quick and literally dirty image size comparisons now two Schneider lenses in Robot Screw mount (M26), a Xenar 37.5mm f/2.8 and a Xenon 40mm f/1.9. I was surprised about how close they come to fill the Sony A7 full frame sensor, given that they were intended for 24x24mm cameras. I used a combination of adapters, M26 to M42, M42 helicoid to Sony E, which doesn't allow exact infinity focus, so these images are just rough image size estimations, not intended for image quality comparison.
Robot Schneider Kreuznach Xenar 1:2.8/37.5
Robot Schneider Kreuznach Xenon 1:1.9/40
|
|
Back to top |
|
|
kds315*
Joined: 12 Mar 2008 Posts: 16541 Location: Weinheim, Germany
Expire: 2021-03-09
|
Posted: Fri Dec 14, 2018 4:23 pm Post subject: |
|
|
kds315* wrote:
e6filmuser wrote: |
This might be of interest. Of:
Schneider-Kreuznach Photographic Enlarging Lenses
APO-Componon HM series.
These are 6-element, 4-group apochromatic enlarger lenses, using high-modulation glass elements,
designed for critical colour rendition and precision industrial applications.
・40mm F2.8
・45mm F4
・60mm F4
・90mm F4.5
・120mm F5.6
・150mm F4
I have the 40mm and the 90mm for macro. The 40 covers 35mm format and the 90 something like 60 x66mm (I can't find the original source at the moment). |
Thanks but there are no "high-modulation glass elements", there are only glass elements which achieve high modulation in the resulting images
Excellent lenses indeed, I have a few myself! _________________ 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 |
|
|
e6filmuser
Joined: 12 Nov 2010 Posts: 566 Location: Reading UK
|
Posted: Fri Dec 14, 2018 4:31 pm Post subject: |
|
|
e6filmuser wrote:
kds315* wrote: |
Thanks but there are no "high-modulation glass elements", there are only glass elements which achieve high modulation in the resulting images
Excellent lenses indeed, I have a few myself! |
Not my words! I just quoted them. _________________ Dedicated to using manual focus lenses with digital. Equiped for photography from macro to panoramic & from ultra-wide to extreme telephoto. Mostly shooting outdoor macro. Experienced entomological taxonomist. Some knowledge of mushrooms. |
|
Back to top |
|
|
dickb
Joined: 04 Apr 2008 Posts: 821
|
Posted: Thu Mar 14, 2019 4:49 pm Post subject: |
|
|
dickb wrote:
And another example from the Schneider Kreuznach Xenoplan machine vision C mount lenses, this time a 17mm f/1.4:
|
|
Back to top |
|
|
dickb
Joined: 04 Apr 2008 Posts: 821
|
Posted: Thu May 30, 2019 3:17 pm Post subject: |
|
|
dickb wrote:
And another one, an Apo Xenoplan 35mm f/1.8
Not to be confused with the Apo Xenoplan 35mm f/2.0, which has a much larger image circle
|
|
Back to top |
|
|
dickb
Joined: 04 Apr 2008 Posts: 821
|
Posted: Thu Nov 14, 2019 7:46 pm Post subject: |
|
|
dickb wrote:
And another one, the Kern Switar 25mm f/1.4 C mount, H16 RX version:
|
|
Back to top |
|
|
dickb
Joined: 04 Apr 2008 Posts: 821
|
Posted: Thu Nov 14, 2019 10:33 pm Post subject: |
|
|
dickb wrote:
And its bigger brother, the Kern Switar 50mm f/1.4 AR version:
The lens didn't fit my C mount adapter perfectly (too wide), so I couldn't get infinity focus. |
|
Back to top |
|
|
dickb
Joined: 04 Apr 2008 Posts: 821
|
Posted: Thu Nov 14, 2019 10:41 pm Post subject: |
|
|
dickb wrote:
And a couple of projection lenses, all intended for 16mm film, all with a narrow rear barrel that may cause some extra vignetting. I don't have a perfectly matching adapter yet, so there may be some extra flare in these images.
SOM Berthiot Cinor 75mm f/1.5
Taylor, Taylor and Hobson 3 inch f/1.8
Taylor, Taylor and Hobson 4 inch f/2.2
|
|
Back to top |
|
|
Blazer0ne
Joined: 12 Sep 2018 Posts: 836
Expire: 2024-12-07
|
Posted: Thu Nov 28, 2019 1:06 am Post subject: |
|
|
Blazer0ne wrote:
...
Last edited by Blazer0ne on Tue Feb 22, 2022 6:23 pm; edited 2 times in total |
|
Back to top |
|
|
Sciolist
Joined: 29 Mar 2017 Posts: 1445 Location: Scotland
Expire: 2021-04-16
|
Posted: Thu Nov 28, 2019 11:27 am Post subject: |
|
|
Sciolist wrote:
Thank you BlazerOne. I've been searching for this thread since I acquired a C-Mount adapter for APSC. I'm completely ignorant when it comes to this mount.
Now where's my notebook . |
|
Back to top |
|
|
Blazer0ne
Joined: 12 Sep 2018 Posts: 836
Expire: 2024-12-07
|
Posted: Thu Nov 28, 2019 4:16 pm Post subject: |
|
|
Blazer0ne wrote:
... |
|
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
|