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Yahvel
Joined: 12 Oct 2012
Posts: 243
Location: USA
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 Posted: Tue Jan 01, 2013 12:50 am Post subject: Zeiss ZF 18mm 3.5 Lens for Canon distorts ??? |
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Yahvel wrote:
Does it ?
Last edited by Yahvel on Tue Jan 01, 2013 5:37 am; edited 2 times in total |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Tue Jan 01, 2013 1:29 am Post subject: |
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Attila wrote:
http://forum.mflenses.com/viewtopic.php?t=53842&view=previous
Flektogon 20mm f4 , may sharp enough to video at wide open.
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Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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Yahvel
Joined: 12 Oct 2012
Posts: 243
Location: USA
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| Posted: Tue Jan 01, 2013 5:29 am Post subject: |
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Yahvel wrote:
| Attila wrote: |
http://forum.mflenses.com/viewtopic.php?t=53842&view=previous
Flektogon 20mm f4 , may sharp enough to video at wide open. |
Thanks Attila, i appreciate it.  |
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OPAL
Joined: 11 Dec 2012
Posts: 354
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| Posted: Wed Jan 02, 2013 12:22 pm Post subject: Distorts? |
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OPAL wrote:
I don't know of any SWA glass without any barrel distortion, except the famous BIOGON glasses! |
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hifisapi
Joined: 25 Sep 2012
Posts: 941
Location: USA
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| Posted: Wed Jan 02, 2013 1:04 pm Post subject: Re: Distorts? |
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hifisapi wrote:
| OPAL wrote: |
| I don't know of any SWA glass without any barrel distortion, except the famous BIOGON glasses! |
My 18mm f3.5 SMC Pentax lens has very little visible distortion, either does the 20mm F4.
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ACQUIRED OVER 30 YEARS:
Cameras: DSLR=Pentax istDS FILM=Pentax SP, SP-F, ESII, SP1000, KX, K2
Lenses : Pentax M42 = Super Multi Coated Takumars 50/1.4 55/1.8 100/4-BELLOWS 500/4.5 1000/8 135-600/6.7 Pentax PK= SMC Pentax-Ks K17/4-FF Fisheye K18/3.5 K20/4 K24/3.5 K28/3.5 K28/2 K35/3.5 K35/2 K50/1.2 K50/1.4K 50/4-MACROK 55/1.8 K85/1.8 K100/4-MACRO K100/4-BELLOWS K105/2.8 K120/2.8 K135/3.5 K135/2.5 K150/4 K200/4 K400/5.6 K45-125/4K 85-210/4.5 Pentax PKM = SMC Pentax-M M40/2.8-Pancake M50/1.4 M75-150/4 M80-200/4.5 Pentax PKA= SMC Pentax-A A15/3.5 A50/2.8-MACRO A28/2 A35/2 A50/1.4 A135/2.8 A200/4 A*300/4 A35-105/3.5 A24-50/4 A70-210/4 TAMRON AD2= SP80-200/2.8 SP180/2.5 TOKINA AT-X PK= ATX28-85/3.5-4.5 ATX35-70/2.8 ATX60-120/2.8 ATX80-200/2.8 ATX100-300/4 ATX90/2.5 MACRO KIRON-LESTER DINE PK = 105/2.8-MACRO VIVITAR PK = 135/2.8-MACRO 28-85/4 NOFLEXAR AUTOBELLOWS PK = 60/4 105/4 |
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OPAL
Joined: 11 Dec 2012
Posts: 354
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| Posted: Wed Jan 02, 2013 7:01 pm Post subject: Re: Distorts? |
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OPAL wrote:
| hifisapi wrote: |
| OPAL wrote: |
| I don't know of any SWA glass without any barrel distortion, except the famous BIOGON glasses! |
My 18mm f3.5 SMC Pentax lens has very little visible distortion, either does the 20mm F4. |
1 - 2 % distortion are not bad for such SWA glasses and can be corrected very easily with PS today! |
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ForenSeil
Joined: 15 Apr 2011
Posts: 2726
Location: Kiel, Germany.
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| Posted: Wed Jan 02, 2013 7:14 pm Post subject: |
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ForenSeil wrote:
Distortion is very low (it's hard to see/find it on APS-C) but in "wave-form" so hard to correct by hand
So it's no problem until you wan't to make very demanding architecture shots on FF-sensors
Maybe there's an PTlens profile to correct that.
The only better lens I know in that league is the Canon 17mm TSE
It's perfect for architecture even on FF but more expensive.
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I'm not a collector, I'm a tester
My camera: Sony A7+Zeiss Sonnar 55/1.8
Current favourite lenses (I have many more):
A few macro-Tominons, Samyang 12/2.8, Noritsu 50.7/9.5, Rodagon 105/5.6 on bellows, Samyang 135/2, Nikon ED 180/2.8, Leitz Elmar-R 250/4, Celestron C8 2000mm F10
Most wanted: Samyang 24/1.4, Samyang 35/1.4, Nikon 200/2 ED
My Blog: http://picturechemistry.own-blog.com/
(German language) |
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Esox lucius
Joined: 26 Aug 2008
Posts: 2441
Location: Helsinki, Finland
Expire: 2011-11-18
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| Posted: Wed Jan 02, 2013 10:00 pm Post subject: |
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Esox lucius wrote:
| ForenSeil wrote: |
The only better lens I know in that league is the Canon 17mm TSE
It's perfect for architecture even on FF but more expensive. |
Canon 17mm tilt-shift shows about 1-1.2% of barrel distortion, plenty enough for the eye to spot it in architecture and walls. When you shift the lens, you'll notice barrel distortion changes (and increases). Camera RAW 7 and all RAW converters I have used have a correction profile for it, simple to get rid of in still photography but not so simple for video.
Every single super-wide angle lens for still photography shows geometric distortion in barrel form, including the CZJ 4/20 Flektogon. What some see as a show-stopper others don't/won't notice, it is very difficult to say which is good enough for you. Both those lenses are good, but how good... you decide.
I don't mind if the geometric distortion is simple "round" barrel, it's the "moustache" or waved barrel distortion that's annoying. |
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