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cheve
Joined: 31 Mar 2009
Posts: 182
Expire: 2011-12-06
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 Posted: Wed Oct 28, 2009 3:02 am Post subject: should I try to clean this |
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cheve wrote:
All,
I have found the a round faint impression behind the front glass of the lens(as shown below). I think it is oil or grease from one of the inner tubes inside the lens barrel; but I am not sure. Should I try to clean it or just leave it alone?
thanks for looking,
Cheers
_________________
Adaptall-2: 17/3.5(51B),80-210/3.8-4(103A),60-300/3.8-5.4(23A) C/Y: CZ 35-70/3.4,RMC Tokian 80-200/4.5
EXk: Topcor Re Auto 35/2.8(broken),135/3.5, Steinheil Culminar 135/4.5 Leitz-R: 50/2,90/2,180/4,180/3.4,Angenieux 35-70/2.5-3.3
M42: pentacon 135/2.8,135/2.8(preset),Super-Takumar 55/1.8,Meyer-Optik 50/1.8 FD: Voigtlander 125/2.5 SL
K: smc 50/1.2, porst 55/1.2, Takumar(Bayonet) 135/2.5 Minolta: rokker 58/1.4,58/1.2 nikkon: Nikkor H Auto 300/4.5
OM: 21/2,21/3.5,28/3.5,50/1.2,300/4.5,500/8,35-70/3.6, viv 17/3.5,viv 28/1.9,viv 135/2.3
Rollei: Voigtlander Color-Ultron 55/1.4 AR T: Tele-Astranar 135/3.5
EF: 30/1.4(Sigma),50/1.8,28-70L,80-200L,24-105L,70-300DO,18-200OS(Sigma)
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Excalibur
Joined: 19 Jul 2009
Posts: 5017
Location: UK
Expire: 2014-04-21
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| Posted: Wed Oct 28, 2009 7:28 am Post subject: |
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Excalibur wrote:
****Should I try to clean it or just leave it alone?****
Well I turned the brightness to max and can see something like Saturn's rings?
But the common answer to these sort of questions is:- If you are happy with the results in your shots then don't bother. But if you are competent at taking a lens apart for cleaning, then why not...... anyway the important lens elements for smears, fungus etc are the back ones.
_________________
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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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Wed Oct 28, 2009 12:40 pm Post subject: |
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Attila wrote:
| Excalibur wrote: |
****Should I try to clean it or just leave it alone?****
Well I turned the brightness to max and can see something like Saturn's rings?
But the common answer to these sort of questions is:- If you are happy with the results in your shots then don't bother. But if you are competent at taking a lens apart for cleaning, then why not...... anyway the important lens elements for smears, fungus etc are the back ones. |
+1 touch only if necessary and you able to finish it well.
_________________
-------------------------------
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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cheve
Joined: 31 Mar 2009
Posts: 182
Expire: 2011-12-06
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| Posted: Wed Oct 28, 2009 1:12 pm Post subject: |
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cheve wrote:
| Excalibur wrote: |
****Should I try to clean it or just leave it alone?****
Well I turned the brightness to max and can see something like Saturn's rings?
But the common answer to these sort of questions is:- If you are happy with the results in your shots then don't bother. But if you are competent at taking a lens apart for cleaning, then why not...... anyway the important lens elements for smears, fungus etc are the back ones. |
thanks for the pointer, Excalibur, I will check my shots per your suggestion. I can take things apart, but putting the parts back together would be a whole new adventure:-).
Sadly, I think my new toy(ie. this lens) may have other issue -- I think somebody had taken the lens apart before and did not put it back together correctly. This lens is a zoom and it appears that the focus distance does not agree with the distance markers on the lens barrel -- at least on the wide-end. I will do some more test to confirm.
Cheers,
Cheers,
_________________
Adaptall-2: 17/3.5(51B),80-210/3.8-4(103A),60-300/3.8-5.4(23A) C/Y: CZ 35-70/3.4,RMC Tokian 80-200/4.5
EXk: Topcor Re Auto 35/2.8(broken),135/3.5, Steinheil Culminar 135/4.5 Leitz-R: 50/2,90/2,180/4,180/3.4,Angenieux 35-70/2.5-3.3
M42: pentacon 135/2.8,135/2.8(preset),Super-Takumar 55/1.8,Meyer-Optik 50/1.8 FD: Voigtlander 125/2.5 SL
K: smc 50/1.2, porst 55/1.2, Takumar(Bayonet) 135/2.5 Minolta: rokker 58/1.4,58/1.2 nikkon: Nikkor H Auto 300/4.5
OM: 21/2,21/3.5,28/3.5,50/1.2,300/4.5,500/8,35-70/3.6, viv 17/3.5,viv 28/1.9,viv 135/2.3
Rollei: Voigtlander Color-Ultron 55/1.4 AR T: Tele-Astranar 135/3.5
EF: 30/1.4(Sigma),50/1.8,28-70L,80-200L,24-105L,70-300DO,18-200OS(Sigma)
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Excalibur
Joined: 19 Jul 2009
Posts: 5017
Location: UK
Expire: 2014-04-21
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| Posted: Wed Oct 28, 2009 9:16 pm Post subject: |
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Excalibur wrote:
****This lens is a zoom and it appears that the focus distance does not agree with the distance markers on the lens barrel -- at least on the wide-end. I will do some more test to confirm.***
Zooms are complicated, some guys just seem to be clever in taking them apart.....but not me and I end up with some handy screws and a magnifying glass.
_________________
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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indianadinos
Joined: 06 Jul 2008
Posts: 1310
Location: Toulouse, France
Expire: 2011-12-05
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| Posted: Wed Oct 28, 2009 10:15 pm Post subject: |
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indianadinos wrote:
Hi,
| cheve wrote: |
Sadly, I think my new toy(ie. this lens) may have other issue -- I think somebody had taken the lens apart before and did not put it back together correctly. This lens is a zoom and it appears that the focus distance does not agree with the distance markers on the lens barrel -- at least on the wide-end. I will do some more test to confirm.
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Be careful: the zoom lenses (at least the old ones, cannot be sure for the new AF ones) change the focal point when you change the focal length (maybe you have noticed this when focusing first and zooming later). The distance scale, thus, may be correct for a given focal length and not for the whole range ...
Cheers
_________________
Please visit my blogs Shooting with a Pentax K10D / FF Visions
Takumar: 24/3.5, 28/3.5, 35/2, 35/3.5, 50/1.4, 55/1.8, 85/1.8, 105/2.8, 120/2.8, 135/3.5, 150/4, 200/4
Pentax-K: M28/2.8, K28/3.5, M50/1.4, A50/1.7, M50/4 Macro, K85/1.8, K105/2.8, K135/2.5, M200/4, M70-150/4
Zeiss: Flektogon 20/2.8, 20/4, 35/2.4, 35/2.8, Tessar 50/2.8, Pancolar 50/1.8, Biotar 58/2, Sonnar 135/3.5, Sonnar 180/2.8
Meyer: Primagon 35/4.5, Domiplan 50/2.8, Oreston 50/1.8, Primoplan 58/1.9, Trioplan 100/2.8, Orestor 100/2.8, Orestor 135/2.8
Schacht/Steinheil: Travenar 90/2.8, Travenon 135/4.5, Quinar 135/2.8, Quinar 135/3.5
Russian: MIR 37B, Industar 50/3.5, Helios 44M & 44M-2, Jupiter 37A
P6: Flektogon 50/4, Biometar 80/2.8, Orestor 300/4
Nikkor: Nikkor-O 35/2, Micro 55/3.5, Nikkor-S 50/1.4, Nikkor-Q 135/2.8
Fuji: EBC 28/3.5, EBC 55/3.5 Macro, EBC 135/2.5
Misc Lenses: Kiron 105/2.8 Macro, Tamron SP90/2.5
... and a few other Vivitar, Tamron, Sigma and Soligor lenses ...
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cheve
Joined: 31 Mar 2009
Posts: 182
Expire: 2011-12-06
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| Posted: Thu Oct 29, 2009 2:05 am Post subject: |
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cheve wrote:
indianadinos, thanks. I did not know that the distance scale may only be good for a given focal length. The lens in question is Tamron SP 60-300mm which I believe is relatively modern. I will test more over the weekend -- but it looks like I will have a new paper weight in my collection.
Cheers,
_________________
Adaptall-2: 17/3.5(51B),80-210/3.8-4(103A),60-300/3.8-5.4(23A) C/Y: CZ 35-70/3.4,RMC Tokian 80-200/4.5
EXk: Topcor Re Auto 35/2.8(broken),135/3.5, Steinheil Culminar 135/4.5 Leitz-R: 50/2,90/2,180/4,180/3.4,Angenieux 35-70/2.5-3.3
M42: pentacon 135/2.8,135/2.8(preset),Super-Takumar 55/1.8,Meyer-Optik 50/1.8 FD: Voigtlander 125/2.5 SL
K: smc 50/1.2, porst 55/1.2, Takumar(Bayonet) 135/2.5 Minolta: rokker 58/1.4,58/1.2 nikkon: Nikkor H Auto 300/4.5
OM: 21/2,21/3.5,28/3.5,50/1.2,300/4.5,500/8,35-70/3.6, viv 17/3.5,viv 28/1.9,viv 135/2.3
Rollei: Voigtlander Color-Ultron 55/1.4 AR T: Tele-Astranar 135/3.5
EF: 30/1.4(Sigma),50/1.8,28-70L,80-200L,24-105L,70-300DO,18-200OS(Sigma)
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cheve
Joined: 31 Mar 2009
Posts: 182
Expire: 2011-12-06
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| Posted: Thu Oct 29, 2009 2:11 am Post subject: |
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cheve wrote:
| Excalibur wrote: |
| ...some handy screws and a magnifying glass. |
I need some magnifying glass. So there is the option of turning this potential paper weight of mine to something more useful -- I like that idea. 
_________________
Adaptall-2: 17/3.5(51B),80-210/3.8-4(103A),60-300/3.8-5.4(23A) C/Y: CZ 35-70/3.4,RMC Tokian 80-200/4.5
EXk: Topcor Re Auto 35/2.8(broken),135/3.5, Steinheil Culminar 135/4.5 Leitz-R: 50/2,90/2,180/4,180/3.4,Angenieux 35-70/2.5-3.3
M42: pentacon 135/2.8,135/2.8(preset),Super-Takumar 55/1.8,Meyer-Optik 50/1.8 FD: Voigtlander 125/2.5 SL
K: smc 50/1.2, porst 55/1.2, Takumar(Bayonet) 135/2.5 Minolta: rokker 58/1.4,58/1.2 nikkon: Nikkor H Auto 300/4.5
OM: 21/2,21/3.5,28/3.5,50/1.2,300/4.5,500/8,35-70/3.6, viv 17/3.5,viv 28/1.9,viv 135/2.3
Rollei: Voigtlander Color-Ultron 55/1.4 AR T: Tele-Astranar 135/3.5
EF: 30/1.4(Sigma),50/1.8,28-70L,80-200L,24-105L,70-300DO,18-200OS(Sigma)
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