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eow

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Jun 22, 2004
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Dear friends, pls advice as i'm going thru my lenses today
i found some white spot inside the the minolta 75-300mm f/4.5-5.6 lens which i got during last sitex


had check and confirmed all my other lenses are clean and spotless even for those i bought
2nd hand.
Q1. The lens when not in used had been kept in the dry cabinet all these while..did anyone kena the same case before?

the spot gather only at the plastic part of the body the glass is cleaned though
 

GENO

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Jul 31, 2004
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that is new right? u got keep in dry box anot?
 

Del_CtrlnoAlt

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Feb 15, 2003
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eow said:
Dear friends, pls advice as i'm going thru my lenses today
i found some white spot inside the the minolta 75-300mm f/4.5-5.6 lens which i got during last sitex


had check and confirmed all my other lenses are clean and spotless even for those i bought
2nd hand.
Q1. The lens when not in used had been kept in the dry cabinet all these while..did anyone kena the same case before?

the spot gather only at the plastic part of the body the glass is cleaned though
nice crystal there.... maybe ask timberwolf wanna exchange anot...
 

eow

Senior Member
Jun 22, 2004
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yes bro it kept in the the electrical dry cabinet when not in used..
other lenses kept in the same cab is clean though..
it came togther with my cam and kit lens
 

hazta

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Jul 17, 2005
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He has mentioned itz been kept in dry cabi.

Anywayz.. dat looks bad bro.. :what: At least e glass r ok.. :)
 

GENO

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eow said:
yes bro it kept in the the electrical dry cabinet when not in used..
other lenses kept in the same cab is clean though..
it came togther with my cam and kit lens
can it be water gotten in? did u shoot once in the rain before and got rain drops which u did not clean away? that day at suntec, is the fugus there?
 

eow

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Jun 22, 2004
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the uv filter is kept on at all time bro
just like to check with fellow 75-300mm users...do u guys have these prob too?
 

limkopi

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Aug 31, 2004
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Nope. Got mine during Comex... Still looking fine & clean despite it being out of my dry box during the past couple of rainy weeks (yes, I know it's not a recommended practice).
Guess u had tough luck...
 

eow

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Jun 22, 2004
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sigh ... a trip to the kmsc tmr
 

AncientMariner

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Dec 1, 2004
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eow said:
sigh ... a trip to the kmsc tmr
Hell, just as I am comptemplating getting a couple more new Minolta lenses.
Guess I will put a hold until you find out what it is and what caused that.
Would really appreciate your feedback. Tks.
 

eow

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Jun 22, 2004
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AncientMariner said:
Hell, just as I am comptemplating getting a couple more new Minolta lenses.
Guess I will put a hold until you find out what it is and what caused that.
Would really appreciate your feedback. Tks.
no prob will update u guys
 

dominator

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Mar 7, 2005
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noy fungus, looks more like the clear coat coming off.
 

eow

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Jun 22, 2004
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just check again 'it' stay still even i shake it
going out soon to have it check at kmsc
 

ldft

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Nov 15, 2005
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Can't confirm from the photo, but if it is only appearing on the plastic, it might be an issue called blooming. Let me try to explain. When plastic or rubber is moulded, there are certain chemicals added in to control the hardening or setting of the material. If this compound is not properly mixed, or the amount used is not quite correct, after a while this stabilizing material will slowly ooze out, and typically form a whitish powdery coating on the surface.

So if it is a powdery it's probably blooming, if it is more crystal like, than, sorry, have no idea. Hope this helps.
 

TME

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Jan 19, 2002
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eow, is that whitish stuff on your filter or front element of the lens? I notice that your filter is still on the lens?
 

sulhan

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May 11, 2002
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Hiee...

It look like a tarnishing of the or "peeling of paint form the black flare cutting black surface.
These parts may have been black painted and maybe peeled off due to some workmanship...

Worst thing i could think of...is the "glue" that is used to bond the 2nd + 3rd element degraded....
From the diagram form catalogue (pg16).......the 1st element is single...the 2nd+3rd is joined to formed an achromatic doublet...

rgds,
sulhan
 

Zerstorer

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Jul 8, 2002
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Nothing to worry about. It's just degradation of the inner lining. I have it in ALL of my old minolta lenses.
 

eow

Senior Member
Jun 22, 2004
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Hello Bros Idft,sulhan,zerstorer,Tme and those who advise earlier
Just came back went to the kmsc today the tech just cfm it not fungus..and the powdery stuff is actually the lubricants as it does not affect the lens hence no servicing needed :)
 

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