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Braddanman
Joined: 13 Aug 2012 Posts: 94 Location: UK
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Posted: Sun Feb 24, 2013 9:18 pm Post subject: Sigma 24mm f2.8 Super-Wide II - Loose front element |
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Braddanman wrote:
Hi
Having read about the 28mm Mini-Wide in the Lens section it reminded me of my Super-Wide 24mm which I obtained about 9 months ago.
It had a bit of fungus in the front and I managed to open it up at the time and clean it nicely.
Gaining access to the front elements was simple. Use a friction tool to unscrew the name plate and then use a friction tool again to unscrew the retaining ring holding the front element. The three front elements are all stacked together with spacers and just lift out. However after putting it back together something was loose when shaking (not hard). It might have been like this before I took it apart but I hadn't noticed. I couldn't figure it out at the time so put it away.
I've just looked at it again and thought maybe I hadn't screwed the retaining ring down firmly enough. The ring was difficult to screw in and out smoothly and I noticed that the threads for this are away from the element so I applied a very small amount of lithium grease to the threads and I've certainly managed to screw it in more tightly. However there is still a small rattle. So using a lens cloth I gently pressed on to the front element to hold it in place and when shaking something is still loose. The spacers and elements all fit together logically so I don't think I've made a mistake putting it back together.
I gave it a quick test in the house and I can't notice any effects due to this but then I'm no expert when it comes to analyzing lens performance.
After all that preamble what I'd like to know is that maybe for this lens it's normal?? Or is this never normal for any lens??
Thanks
Last edited by Braddanman on Sun Feb 24, 2013 9:49 pm; edited 1 time in total |
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DigiChromeEd
Joined: 29 Dec 2009 Posts: 3462 Location: Northern Ireland
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Posted: Sun Feb 24, 2013 9:37 pm Post subject: |
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DigiChromeEd wrote:
I have the same lens and you will be glad to hear that mine has a slight rattle too when gently shaken. I have owned it from new and it has never been disassembled. _________________ "I've got a Nikon camera, I like to take a photograph" - Paul Simon |
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Braddanman
Joined: 13 Aug 2012 Posts: 94 Location: UK
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Posted: Sun Feb 24, 2013 9:48 pm Post subject: |
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Braddanman wrote:
Haa, that's good to know. Thanks for your quick response. Now I know that I'll have to take it our for a proper run as it's been languishing in it's box as a fixer but it seems there's nothing to fix.
The 28mm mini-wide is currently being praised highly in the lens section, how do you rate this lens? |
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DigiChromeEd
Joined: 29 Dec 2009 Posts: 3462 Location: Northern Ireland
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Posted: Sun Feb 24, 2013 10:08 pm Post subject: |
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DigiChromeEd wrote:
Braddanman wrote: |
Haa, that's good to know. Thanks for your quick response. Now I know that I'll have to take it our for a proper run as it's been languishing in it's box as a fixer but it seems there's nothing to fix.
The 28mm mini-wide is currently being praised highly in the lens section, how do you rate this lens? |
I like it a lot. The second best 24mm I have behind my Konica Hexanon AR 2.8/24. _________________ "I've got a Nikon camera, I like to take a photograph" - Paul Simon |
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kuuan
Joined: 14 Jan 2008 Posts: 4572 Location: right now: Austria
Expire: 2014-12-26
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Posted: Mon Feb 25, 2013 11:24 am Post subject: |
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kuuan wrote:
to make sure also check performance at infinity. in case the elements are not assembled correctly / tight enough performance at close focus may be fine but not so at infinity. _________________ my photos on flickr: https://www.flickr.com/photos/kuuan/collections |
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Excalibur
Joined: 19 Jul 2009 Posts: 5019 Location: UK
Expire: 2014-04-21
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Posted: Mon Feb 25, 2013 4:36 pm Post subject: |
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Excalibur wrote:
The Sigma 24mm is one of my favourite lens (for film) as the shots are always sharp.
_________________ Canon A1, AV1, T70 & T90, EOS 300 and EOS300v, Chinon CE and CP-7M. Contax 139, Fuji STX-2, Konica Autoreflex TC, FS-1, FT-1, Minolta X-700, X-300, XD-11, SRT101b, Nikon EM, FM, F4, F90X, Olympus OM2, Pentax S3, Spotmatic, Pentax ME super, Praktica TL 5B, & BC1, , Ricoh KR10super, Yashica T5D, Bronica Etrs, Mamiya RB67 pro AND drum roll:- a Sony Nex 3
.........past gear Tele Rolleiflex and Rollei SL66.
Many lenses from good to excellent. |
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guardian
Joined: 18 Mar 2009 Posts: 1749
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Posted: Tue Feb 26, 2013 2:17 am Post subject: |
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guardian wrote:
Regarding the Mini-wides:
I, too, have seen the recent positive comments. Earlier, which is to say some months back, comments were less positive. I have tried, therefore, to focus my acquisition efforts on the Mini-wide II lenses. The II's seem consistently to rate better. That said, I did just recently pick up a Mini-wide, but only because the price was very, very low. My Mini-wide II lens, with M42 mount and very clean, was not cheap.
On the rattle: This is going to sound disrespectful and I don't mean it that way. I certainly intend no disrespect whatsoever to other forum members, and this is only just MHO:
But a lens that rattles would be of concern to me. I would be even more concerned if I knew it was one of the lens elements moving about. If I owned a "rattler" I would try to find the cause and I would attempt to fix it. I don't own a Super-wide yet. They are very expensive. But I have my eye on one and if I win it you can be sure it will get the "shake test" first thing. |
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eduardo.berth@gmail.com
Joined: 19 Mar 2016 Posts: 4
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Posted: Sat Mar 19, 2016 11:25 pm Post subject: |
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eduardo.berth@gmail.com wrote:
I really need your help. I have just purchased this lens a days ago but had to open it in order to clean it but had the elements mixed when reassembling it. Can anyone help me letting me know the position of the back elements and separators? Thanks a lot! |
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