Hi Fred,
This is just a hypothesis, but I would guess that non-IF, non-FREE
lenses have elements fixed with relation to each-other, so there is no
air movin between the glass surfaces. IF and FREE lenses do have
elements moving WRT others, so there is also air-flow, and thus an
influx of dust.
Hi,
On 12 Nov 2002 at 21:41, Bojidar Dimitrov wrote:
This is just a hypothesis, but I would guess that non-IF, non-FREE
lenses have elements fixed with relation to each-other, so there is no
air movin between the glass surfaces. IF and FREE lenses do have
elements moving WRT others, so there
2) How do you deal with dust, and how do you store and protect your
lenses?
I buy foam lined hard cases for all my gear (photo, video and audio) and cut
them to match the gear. Store them in there, label the outside and you know
where everything is.
They travel well (especially flying), are
the assembly and the film plane?
-Original Message-
From: Sas Gabor [mailto:sas.gabor;fornax.hu]
Sent: 13 November 2002 09:58
To: [EMAIL PROTECTED]
Subject: Re: Dust in Lenses
Hi,
On 12 Nov 2002 at 21:41, Bojidar Dimitrov wrote:
This is just a hypothesis, but I would guess
It is my hypothesis that telephotos (except IF ones, of course) tend
to exchange more air while focusing back and forth (with their
usually longer helicoids) than do most wide angles, and so they end
up sucking in more dust. ;-)
Unfortunately, FA135/2.8 FA*200/2.8 are IF, and they still suck
I think it is best to put them in a plastic bag as soon as you buy them new,
seal the bag and never take them out anymore:-)
On the other hand, if you really insist using them, how much is this dust
effecting the quality of your photographs? Is it really an issue?
After this issue was brought
Somehow the 43 is pretty dust resistance. Mine is clean too even
it is my most used lens for the last 3 years. FA24 2nd. FA77/1.8
F/FA135/2.8 are dust suckers.
It is my hypothesis that telephotos (except IF ones, of course) tend
to exchange more air while focusing back and forth (with their
It is my hypothesis that telephotos (except IF ones, of course) tend
to exchange more air while focusing back and forth (with their
usually longer helicoids) than do most wide angles, and so they end
up sucking in more dust. ;-)
Unfortunately, FA135/2.8 FA*200/2.8 are IF, and they still suck
in a ~very~ dusty place), and that
much (or most) of the internal dust in many lenses is picked up
while focusing and/or zooming.
Many lenses suck air in, as well as push air out, of course,
whenever the internal air volume changes during focusing and/or
zooming. Unless the air passes through some
On 9 Nov 2002 at 22:25, Fred wrote:
I personally feel that some dust in unavoidable in many lenses, that
it is not usually picked up in a lens during storage (unless perhaps
the lens is sitting unprotected in a ~very~ dusty place), and that
much (or most) of the internal dust in many lenses
On Saturday, November 9, 2002, at 08:30 PM, Chris Niesmertelny wrote:
I'm completely disappointed. Most of my lens collection is suffering
from a
very fine coating of internal dust. I don't have an expensive
collection
but it is fairly complete from 24mm to 200mm, and thankfully my 43mm
screwmount lenses.
Chris
Fred said:
I personally feel that some dust in unavoidable in many lenses, that
it is not usually picked up in a lens during storage (unless perhaps
the lens is sitting unprotected in a ~very~ dusty place), and that
much (or most) of the internal dust in many lenses
The integrated red filter has a piece of dust at the center.
How do I clean it?
Hey, guys, why is everybody so upset over a little dust? If it isn't
starting fungus (which can be checked by a loupe most of time), I
wouldn't worry about dust. Even about a speckle of black pain inside
the
[EMAIL PROTECTED] writes:
However, I don't think I've ever seen a single lens that is perfectly clean
inside.
There was a Pentax shooter, a retired Nikon Rep from Washington DC (I think),
who gave an interesting commentary to the list a couple of years ago. I
don't know if anyone saved
14 matches
Mail list logo
