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wilco
Joined: 15 Mar 2009
Posts: 135
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 Posted: Mon Jun 08, 2009 9:17 pm Post subject: dust in the lens |
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wilco wrote:
Hi,
I got my Tamron SP 300mm f5.6 today. There is a speck of dust in the middle elements. Will it affect the output? I have not received the Tamron adaptall adapter for Nikon yet.
I was a bit upset after I saw the dust in the lens. I paid US$110 from ebay UK site. |
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Gus Helios
Joined: 10 Feb 2009
Posts: 144
Location: Cali
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| Posted: Mon Jun 08, 2009 9:24 pm Post subject: |
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Gus Helios wrote:
My guess is no... it should not be a problem.
The only dust I have ever had an issue with is a macro lens that has some dust on the rear element... When I stop that lens down to F18 or more for greater DOF on the macro shots... I see the dust as a tiny blur in the shot.
But I have never noticed any issues from small dust particles on the middle or front elements of a lens... I think the middle and front elements are just too far away from the sensor to be a real issue.. Just my experience
ps are you a fan of the band wilco?
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Nothing a shot a jack and some George Jones can't fix - Gus |
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wilco
Joined: 15 Mar 2009
Posts: 135
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| Posted: Mon Jun 08, 2009 10:25 pm Post subject: |
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wilco wrote:
Thanks for your reply. No I am not a fan of the band wilco  . Probably my english teacher since he gave me this name. |
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aoleg
Joined: 22 Feb 2008
Posts: 1387
Location: Berlin, DE
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| Posted: Tue Jun 09, 2009 1:53 am Post subject: Re: dust in the lens |
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aoleg wrote:
| wilco wrote: |
Hi,
I got my Tamron SP 300mm f5.6 today. There is a speck of dust in the middle elements. Will it affect the output? I have not received the Tamron adaptall adapter for Nikon yet.
I was a bit upset after I saw the dust in the lens. I paid US$110 from ebay UK site. |
Dust? Are you serious? It's always present in old lenses. I don't have a single used lens without dust, weatherproofed Canon L's being the exception. If you don't have haze, mold or fungus inside, loose dust particles are completely normal and won't affect anything (unless that's severe dust that covers significant parts of a lens surface, of course, in which case you'll start losing contrast).
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rawhead
Joined: 09 Feb 2009
Posts: 1525
Location: Boston, MA
Expire: 2014-04-29
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| Posted: Tue Jun 09, 2009 3:37 am Post subject: |
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rawhead wrote:
There is a whole range of "dust" specks. Real dust specks, the tiny stuff that you can sort of see when the light hits it right, will probably have minimal impact. Larger "specks" of junk, usually black, and very visible when looking through regardless of the light, might have a bigger chance of affective the image.
Easiest way to test it yourself is to shoot at a white wall, blue sky, etc. stopped all the way down (that's when effects are most prnounced).
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Sony α7R, Pentax 67II, Kiev-60, Hasselblad 203FE, 903SWC, Graflex Norita 66, Mamiya M645 1000s, Burke & James 8x10, Graflex Pacemaker Speed Graphic (4x5 and 3x4), Century Graphic (2x3), R.B. Graflex Seried D, Rolleiflex SL66E, Rolleiflex 2.8C Xenotar, Mamiya C330f, a few M42, six P6, three OM, four Hasselblad, two Pentax 67, two Mamiya 645, one Noritar, and a sprinkle of EF. Oh, and an Aero Ektar and Leica Noctilux |
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djmike
Joined: 01 Apr 2009
Posts: 930
Location: Taiwan
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| Posted: Tue Jun 09, 2009 3:53 am Post subject: |
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djmike wrote:
| rawhead wrote: |
There is a whole range of "dust" specks. Real dust specks, the tiny stuff that you can sort of see when the light hits it right, will probably have minimal impact. Larger "specks" of junk, usually black, and very visible when looking through regardless of the light, might have a bigger chance of affective the image.
Easiest way to test it yourself is to shoot at a white wall, blue sky, etc. stopped all the way down (that's when effects are most prnounced). |
Yep, actually all my used lenses from bidding market have dust insides but I have not seen any "unacceptable" result yet but the dust in my DSLR chip.
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DSLR: Canon 400D
SLR: Nikon FM2 + Canon A-1 + Canon AE1-P + Praktica MTL-5B + Pentax Spotmatic F + Fujica ST801 + Voigtlander Bassematic + Voigtlander Vito + Rollei 35S + Rolleiflex SL35 ME + Canon QL17 GIII + Olympus Pen EE-3
Lenses
M42: CZJ Flektogon 35/2.4 + CZJ Flektogon Zebra 35/2.8 + CZJ Pancolar 50/1.8 + CZJ Sonnar 135/3.5 + CZJ Tessar 50/2.8 Chrome + Pentacon 135/2.8 + Pentacon 50/1.8 + SMC Takumar 50/1.4 + SMC Takumar 55/2 + SMC Takumar 135/3.5 + Fujinon 55/1.8 + Jupiter-9 85/2 + Jupiter-37A 135/3.5 + Helios 44-6 58/2
Nikor: Nikkor 50/1.4 + Nikkor 28/3.5 + Nikkor 35-105 Zoom + 36-72 Series E Zoom
Canon: Canon FD + 28/2.8 + 50/1.8 + Canon 35-105 Macro Zoom
Other: Rollei Planar HFT 50/1.8
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M. Valdemar
Joined: 14 Nov 2008
Posts: 93
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| Posted: Tue Jun 09, 2009 11:33 am Post subject: |
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M. Valdemar wrote:
Even a LOT of dust will have absolutely no effect on your images. It's nonsense.
http://www.lensrentals.com/news/2008.10.30/front-element-scratches |
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dof
Joined: 04 Feb 2009
Posts: 339
Location: Southern California
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| Posted: Tue Jun 09, 2009 10:21 pm Post subject: Re: dust in the lens |
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dof wrote:
| wilco wrote: |
Hi,
I got my Tamron SP 300mm f5.6 today. There is a speck of dust in the middle elements. Will it affect the output? |
No. |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Tue Jun 09, 2009 10:37 pm Post subject: |
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Attila wrote:
I have a Planar 85mm with huge scratch in central like broken glass also not effect image quality.
Image quality is effect only if surface covered well, like haze, incredible lot fungus etc.
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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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pirius
Joined: 28 May 2009
Posts: 133
Location: SoFla
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| Posted: Wed Jun 10, 2009 4:51 am Post subject: |
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pirius wrote:
I have a Planar 50 1.7 with scratches on the coating all over the rear element. I can only see the effect when I compare shots at 100% against a mint copy - and often I like the scratched version better because portraits looks smoother without loss of that magic 3D look.
I've recently read a book called "Taming your gremlin". The author says there is an evil creature sitting inside each of us and trying to make us suffer for insignificant reasons. I think that's where all this anxiety comes from - and it results in great bargains popping up on eBay sometimes. "...There is a speck of dust inside the lens..." and the final price goes down 50%. I love it! |
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