 |
|
| View previous topic :: View next topic |
| Author |
Message |
Shrek
Joined: 29 Dec 2008
Posts: 1363
Location: South coast, UK
|
 Posted: Fri Jul 03, 2009 2:46 pm Post subject: CA - purple fringing |
 |
|
Hi all
I've been really struggling with purple fringing with my Tamron SP 60-300 and Tamron SP 70-210 19AH. Well, specifically, bright blue fringing in sunny conditions.
I read somewhere that attaching a UV filter might resolve the problem, and luckily I had a 62mm UV filter discarded in a box! I tried it and it stopped nearly all CA! 
My only concern now is that filters might degrade the resolution...it's a Hoya so shouldn't be too bad, but I'll report back after my holiday 
Thought this might be useful for someone.
_________________
Full frame DSLR: Canon EOS 5D with Carl Zeiss T*, Tamron SP
Crop sensor DSLR: Canon EOS 40D with Pentacon, Tamron SP
C/Y 35mm SLR: Yashica FX-D Quartz with Carl Zeiss T*, Tamron SP
M42 35mm SLR: Asahi Pentax Spotmatic SP 500 with Asahi Super Takumar, Tamron SP
PB 35mm SLR: Praktica BX20 with Prakticar, Tamron SP
See my Flickr photos at http://www.flickr.com/photos/manualfocus-g |
|
| Back to top |
|
 |
estudleon
Joined: 15 May 2008
Posts: 2683
Location: Argentina
|
| Posted: Fri Jul 03, 2009 3:05 pm Post subject: |
|
|
Yes, very usefull at least for me.
I hear two thing about UV filter
1- Like all the filters, degrade the image quality.
2- As it eliminates the UV waves, reduce the blue/purple fringing, and improve the IQ.
How much it degrades and how much improve the IQ?
Rino.
_________________
Konica 2,8/100
CZJ: 4/20, 2,4/35, 1,8/50 aus jena, 3,5/135MC, Pentacon 1,8/50
Pentax S-M-C-1,4/50
Helios 44-3
Mamiya 2,8/135
Misc. : jupiter 9
Stuff used:
A) SRL
Alpa 10 D - kern macro Switar 1,9/50 -black, Kilffit apochromat 2/100.
Asahi pentax spotmatic super takumar 1,4/50
Contaflex super B tessar 2,8/50 Pro-tessar 115
Leica R3 electronic summicron 2/50 elmarit 2,8/35
Konica Autoreflex 3 (2 black and chrome one), TC, T4. 2,8/24, 3,5/28 not MC and MC, 1,8/40, 1,4/50, 1,7/50 MC and not MC, 1,8/85, 3,2/135, 3,5/135, 4/200
Minolta XG9 2,8/35, 2/45, 3,5/135
Nikkormat FTn 1,4/50, 2,8/135
Fujica ST 801, 605, 705n. 3,5/19, 1,4/50, 1,8/55, 4/85, 3,5/135.
Praktica MTL 5 and a lot of M42 lenses.
Voigtlander. Bessamatic m, bessamatix de luxe, bessamatic cs, ultramatic and ultramatic cs.
Skoparex 3,5/35, skopagon 2/40, skopar 2,8/50, skopar X 2,8/50, super lanthar (out of catalogue) 2,8/50, dinarex 3,4/90, dinarex 4,8/100, super dinarex 4/135, super dinarex 4/200, zoomar 2,8/36-83, portrait lens 0, 1 and 2. Curtagon 4/28 and 2,8/35
Canon AV1, 1,8/50
Rolleiflex SL35 and SL35 E. 2,8/35 angulon, 2,8/35 distagon, 1,4/55 rolleinar, 1,8/50 planar, 4/135 tessar, 2,8/135 rolleinar, x2 rollei, M42 to rollei adap.
Etc.
RF
Yashica Minister III
Voightlander Vito, vitomatic I, Vito C, etc.
Leica M. M2, M3 (d.s.) and M4. Schenider 3,4/21, 2/35 summaron 2,8/35 (with eyes). Summicron 2/35 (8 elements with eyes), 2/35 chrome, 2/35 black, 1,4/35 pre asph and aspheric - old -, 2/40 summicron, 2,8/50 elmar, 2/50 7 elements, 2/50 DR, 2/50 - minolta version, 1,4/50 summilux 1966 version, 1,4/75 summilux, 2/90 large version, 2/90 reduced version of 1987, 2,8/90 elmarit large version, 4/135 elmar. |
|
| Back to top |
|
|
GrahamNR17
Joined: 17 Jan 2009
Posts: 827
Location: Norfolk, UK
|
| Posted: Sat Jul 04, 2009 10:12 am Post subject: Re: CA - purple fringing |
|
|
| Shrek wrote: | Hi all
I've been really struggling with purple fringing with my Tamron SP 60-300 and Tamron SP 70-210 19AH. Well, specifically, bright blue fringing in sunny conditions.
I read somewhere that attaching a UV filter might resolve the problem, and luckily I had a 62mm UV filter discarded in a box! I tried it and it stopped nearly all CA!
My only concern now is that filters might degrade the resolution...it's a Hoya so shouldn't be too bad, but I'll report back after my holiday
Thought this might be useful for someone. |
Useful info, I'll give that a try.
Don't worry about IQ, there will be no measurable degradation of image. That goes for pretty much any filter you buy, even the cruddy Jessops ones. The Hoya HMC have better than 98% light transmission (as will most coated ones) and the uncoated ones will be in the region of the upper 90s%. apart from that, they only need to be perfectly flat, and that's been easy to achieve in optical filters for years 
_________________
MF:
35mm: Zeiss Contaflex Alpha :: Praktica Super TL, Super TL1000 :: Fed 4
------------------------------------------------------------------------------------------
Industar: 50-2 3.5/50mm
Mir: Mir-1 2.8/37mm
Zeiss: Pantar 4/75mm :: Pantar 2.8/45
Meyer-Optik: Lydith 3.5/30mm
Tamron: 03A 3.8-4/80-210mm
Prakticar: 4-5.6/70-210mm :: 2.8/28mm (Orestegon) :: 1.8/50mm
(Oreston)
Minolta: E.Rokkor 4.5/50mm (on bellows)
Kodak: Meniscus from 127 Hawkeye (on bellows)
Misc.: Autocrat 3.5/75mm (on bellows) :: Hoya Zoom Close-up ::
Hanimar 4.5/200mm
|
|
| Back to top |
|
|
Orio
Joined: 24 Feb 2007
Posts: 18168
Location: West Emilia
|
| Posted: Sat Jul 04, 2009 10:36 am Post subject: |
|
|
Filters however (even the best ones) may cause internal reflections.
I suggest care in using them in potential flare situations (shooting against the sun, or with a light source in or near the visual field).
It also becomes more important to control the lateral parassite light with a hood (a good habit also without filters).
_________________
Lens sana in corpore sano
My Web Galleries: ORIOFOTO.NET
My Photography Blog (in Italian and English)
Read list of equipment HERE
     |
|
| Back to top |
|
|
trifox
Joined: 14 May 2008
Posts: 2082
Location: UK
|
| Posted: Sat Jul 04, 2009 9:25 pm Post subject: |
|
|
| Orio wrote: | Filters however (even the best ones) may cause internal reflections.
I suggest care in using them in potential flare situations (shooting against the sun, or with a light source in or near the visual field).
It also becomes more important to control the lateral parassite light with a hood (a good habit also without filters). |
yes, Orio... - - but you must admit that the carrying of hoods is not being done by us particulary -- they are always forgotten at home ..
tf
_________________
several crappy lenses...
Flickr.com
CAMERA, LENS, SHUTTER REPAIRS and LENS MOUNT CONVERSION - info@cameraserviceone.com, www.cameraserviceone.com |
|
| Back to top |
|
|
conor12
Joined: 18 Apr 2008
Posts: 126
Location: Dublin
|
| Posted: Wed Jul 29, 2009 12:13 pm Post subject: |
|
|
Knowing that my lenses are not going to get scratched is almost worth a slight decrease in image quality. Although I have to say that it is always on my mind that MAYBE the pic would have been nicer without the filter. I think I need to stop obsessing...
_________________
Yashica: 2.8/24
Leitz: Summicron-R 2/35, Summicron-R 2/50
Zeiss: Biotar 1.5/75, Contax Vario-Sonnar 4/80-200
Asahi: SMC Takumar 1.4/50
Zenit: Helios 44-M |
|
| Back to top |
|
|
Spotmatic
Joined: 18 Aug 2008
Posts: 2117
Location: Netherlands
|
| Posted: Wed Jul 29, 2009 12:36 pm Post subject: |
|
|
| conor12 wrote: | | Knowing that my lenses are not going to get scratched is almost worth a slight decrease in image quality. Although I have to say that it is always on my mind that MAYBE the pic would have been nicer without the filter. I think I need to stop obsessing... |
I always use my lenses without filter. Scratches are not as much degrading the image as you might think. See for yourself:
http://www.lensrentals.com/news/2008.10.30/front-element-scratches
Now, of course I do take care of my lenses, but I would not pass up a rare lens with a scratch on the front lens.
_________________
"Old Takumars never die; they just fade away"
Pentax K-7 + Pentax 645 + Bessa RF 10,5cm Heliar, Bessa II Apo-Lanthar and a 'little' bag full of MF lenses. The lens list is * here *.
My fast 80s: Asahi-Kogaku Takumar 83mm f/1.9 - Super-Takumar 85mm f/1.9 - S-M-C Takumar 85mm f/1.8 - FA 77mm f/1.8 Limited - Cyclop 85/1.5 (Helios-40 innards) - Komura 80mm f/1.8 - Komura 85mm f/1.4 - Accura Supertel Tc 1:1.9 f=85mm - Jupiter-9 2/85 - Meyer Görlitz Primoplan 7,5cm 1:1.9 - Carl Zeiss Jena 75mm f/1.5 Biotar - Carl Zeiss Jena 80mm f/1.8 Pancolar - Canon 85mm f/1.8 S.S.C. - Canon 85mm f/1.2 S.S.C. Aspherical - Enna München Ennalyt 85mm f/1.5 - Olympus Zuiko Auto-T MC 85mm f/2 |
|
| Back to top |
|
|
kds315*
Joined: 12 Mar 2008
Posts: 2888
Location: Weinheim/Germany
|
|
| Back to top |
|
|
lulalake
Joined: 22 Apr 2007
Posts: 943
Location: Near Austin Texas
|
| Posted: Thu Jul 30, 2009 8:13 pm Post subject: Re: CA - purple fringing |
|
|
| Shrek wrote: | Hi all
I've been really struggling with purple fringing with my Tamron SP 60-300 and Tamron SP 70-210 19AH. Well, specifically, bright blue fringing in sunny conditions.
I read somewhere that attaching a UV filter might resolve the problem, and luckily I had a 62mm UV filter discarded in a box! I tried it and it stopped nearly all CA!
My only concern now is that filters might degrade the resolution...it's a Hoya so shouldn't be too bad, but I'll report back after my holiday
Thought this might be useful for someone. |
Do you use Photoshop?
Jules
_________________
The optomist thinks that this is the best of times to be living. The pessimist thinks that that might be true! |
|
| Back to top |
|
|
Katastrofo
Joined: 26 Feb 2007
Posts: 6269
Location: USA
|
| Posted: Fri Jul 31, 2009 3:20 pm Post subject: |
|
|
So what is all this hoopla about purple fringing in California? 
Interesting thread... |
|
| Back to top |
|
|
Shrek
Joined: 29 Dec 2008
Posts: 1363
Location: South coast, UK
|
| Posted: Sat Aug 01, 2009 3:11 pm Post subject: |
|
|
| Katastrofo wrote: | So what is all this hoopla about purple fringing in California?
Interesting thread... |
Haha very good!
Jules - yes I do use photoshop. But I took a load of shots of seagulls recently with a blue sky background, and found that I couldn't remove the fringing without making the sky go grey. Perhaps I should have used the colour replacement tool. Either way, it sucks!
I'll post some examples up as soon as the sun comes out, with and without UV filter. The filter certainly helped produce much better photos with my Tammy SP 60-300!
_________________
Full frame DSLR: Canon EOS 5D with Carl Zeiss T*, Tamron SP
Crop sensor DSLR: Canon EOS 40D with Pentacon, Tamron SP
C/Y 35mm SLR: Yashica FX-D Quartz with Carl Zeiss T*, Tamron SP
M42 35mm SLR: Asahi Pentax Spotmatic SP 500 with Asahi Super Takumar, Tamron SP
PB 35mm SLR: Praktica BX20 with Prakticar, Tamron SP
See my Flickr photos at http://www.flickr.com/photos/manualfocus-g |
|
| Back to top |
|
|
lulalake
Joined: 22 Apr 2007
Posts: 943
Location: Near Austin Texas
|
| Posted: Sun Aug 02, 2009 1:29 am Post subject: |
|
|
| Shrek wrote: | | Katastrofo wrote: | So what is all this hoopla about purple fringing in California?
Interesting thread... |
Haha very good!
Jules - yes I do use photoshop. But I took a load of shots of seagulls recently with a blue sky background, and found that I couldn't remove the fringing without making the sky go grey. Perhaps I should have used the colour replacement tool. Either way, it sucks!
I'll post some examples up as soon as the sun comes out, with and without UV filter. The filter certainly helped produce much better photos with my Tammy SP 60-300! |
I have a great piece oif software that I will send you. I've used it for years and it gives total control over what you want messed with, however, my computer is in pieces at the mopment and it will take a few weeks to get it to you.
Hang in there.
Jules
_________________
The optomist thinks that this is the best of times to be living. The pessimist thinks that that might be true! |
|
| 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
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ
Search
Memberlist
Usergroups
Rss feed
Register
Profile
Log in to check your private messages
Log in
