changing lens

aaron001 · 30th October 2004

if you change lens with a fan blowing strongly from the rear of the camera(opposite from the lens mount opening), will it minimize dust going into the chamber or will there be a vacumn and draw in more dust? any engineering guru or someone with more common sense can comment?

also, i assume toilet is the lease dusty place in the home to change lens...?

Belle&Sebastain · 30th October 2004

Originally Posted by aaron001

if you change lens with a fan blowing strongly from the rear of the camera(opposite from the lens mount opening), will it minimize dust going into the chamber or will there be a vacumn and draw in more dust? any engineering guru or someone with more common sense can comment?

also, i assume toilet is the lease dusty place in the home to change lens...?

not true, indoors may be more dusty than you think, infact everywhere is dusty.

likefunyouare · 30th October 2004

i normally tilt the body down when changing lenses. it may lessen the dust from settling directly into the mirror.
dust on the cmos/ccd is a very common thing for dslrs. we shd be more concern changing to a suitable lens on the go to get a good shot rather than worry about dust getting into the sensor.

Kit · 30th October 2004

You are thinking too much. Just tilt your camera(mount facing downwards) when changing the lens.

rainman · 30th October 2004

The camera can tolerate a little bit of dust, just like we r breathing in billions of germs every sec...

Stereobox · 30th October 2004

agree with likefunyouare. was once asked by someone, why do i settle for using a zoom lens rather than changing lenses. i replied 'scared of dust' ... and then realised how silly i sounded.

reachme2003 · 30th October 2004

Originally Posted by Stereobox

agree with likefunyouare. was once asked by someone, why do i settle for using a zoom lens rather than changing lenses. i replied 'scared of dust' ... and then realised how silly i sounded.

agreed. paranoid about dust! use a OSIM water vacuum to suck all the dust from your camera body. he he!

justarius · 30th October 2004

Originally Posted by Stereobox

agree with likefunyouare. was once asked by someone, why do i settle for using a zoom lens rather than changing lenses. i replied 'scared of dust' ... and then realised how silly i sounded.

unless your lens is airtight, dust will be going in everytime you turn that zoom ring or use the autofocus...

smallaperture · 31st October 2004

Originally Posted by justarius

unless your lens is airtight, dust will be going in everytime you turn that zoom ring or use the autofocus...

Just like to add that it depends on the type of lens:

Type A: Constant length lens, for both zooming and focus (IF/RF) - very little dust gets in as there is no exchange of air during operation.

Type B: Length of lens extends when you zoom and focus - everytime you zoom, air is sucked in, and creates a lot of turbulences that kick up lots of dust inside that would settle on your sensor.

In general, the better designed lenses and the more expensive zooms and primes are of Type A. Also, Type A lenses tend to have their internal elements much cleaner after long use.

espn · 31st October 2004

Actually me worry more on getting the shot due to the time lag of changing len than worry about dust.

There's always something called photoshop

smallaperture · 31st October 2004

Originally Posted by espn

Actually me worry more on getting the shot due to the time lag of changing len than worry about dust.

There's always something called photoshop

Yeah, totally agree to that. In the wakeboard shoot, I was shooting the main show with a lens, but during some waiting time, wanted to shoot some sideshow, but lens far too long for it. It kind of take far too long to change lens. A Sigma 100-300 F4 would be ideal. Not yet Buy, Buy Buy la.

quekky · 1st November 2004

Originally Posted by smallaperture

Yeah, totally agree to that. In the wakeboard shoot, I was shooting the main show with a lens, but during some waiting time, wanted to shoot some sideshow, but lens far too long for it. It kind of take far too long to change lens. A Sigma 100-300 F4 would be ideal. Not yet Buy, Buy Buy la.

2 bodies with 2 different range of zoom will be ideal

efreedom2001 · 1st November 2004

Originally Posted by aaron001

if you change lens with a fan blowing strongly from the rear of the camera(opposite from the lens mount opening), will it minimize dust going into the chamber or will there be a vacumn and draw in more dust? any engineering guru or someone with more common sense can comment?

also, i assume toilet is the lease dusty place in the home to change lens...?

I don't know if the toilet is the least dusty place to change lens but if it is, take extreme care not to drop your lens into the you-know-what.

Witness · 1st November 2004

everywhere also dusty la...its a chance thing...if kena then too bad lo...i always change outdoors with no prob le...

jOhO · 1st November 2004

when i need to change lens, i dun have time to think about whether dust goes in.....

Diablo · 1st November 2004

For me, it depend on the situation.

If u are in a place where there's a breeze blowing, i would rather let the reflex mirror face to wind, than the rear element of my lens.

30th October 2004	#1
aaron001 Member Join Date: Sep 2004 Location: serangoon area Posts: 262	changing lens if you change lens with a fan blowing strongly from the rear of the camera(opposite from the lens mount opening), will it minimize dust going into the chamber or will there be a vacumn and draw in more dust? any engineering guru or someone with more common sense can comment? also, i assume toilet is the lease dusty place in the home to change lens...?

30th October 2004	#4
Kit Senior Member Join Date: Jan 2002 Location: Bukit Timah / Melbourne CBD Posts: 6,034	You are thinking too much. Just tilt your camera(mount facing downwards) when changing the lens. __________________ arkitectural photography http://arkitecturalphoto.1x.com/

1st November 2004	#14
Witness Senior Member Join Date: Mar 2004 Location: www.maverickatwork.com Posts: 6,768	everywhere also dusty la...its a chance thing...if kena then too bad lo...i always change outdoors with no prob le... __________________ w maverick.photography b maverick.blogging

30th October 2004	#3
likefunyouare Member Join Date: Oct 2002 Location: Bedok Posts: 142	i normally tilt the body down when changing lenses. it may lessen the dust from settling directly into the mirror. dust on the cmos/ccd is a very common thing for dslrs. we shd be more concern changing to a suitable lens on the go to get a good shot rather than worry about dust getting into the sensor.

30th October 2004	#5
rainman Member Join Date: Apr 2004 Location: In my own world Posts: 1,112	The camera can tolerate a little bit of dust, just like we r breathing in billions of germs every sec...

30th October 2004	#6
Stereobox Senior Member Join Date: Dec 2003 Location: Cocteau Twins Posts: 2,105	agree with likefunyouare. was once asked by someone, why do i settle for using a zoom lens rather than changing lenses. i replied 'scared of dust' ... and then realised how silly i sounded.

31st October 2004	#10
espn Deregistered Join Date: Dec 2002 Location: Planet Nikon Posts: 22,045	Actually me worry more on getting the shot due to the time lag of changing len than worry about dust. There's always something called photoshop

1st November 2004	#15
jOhO Moderator Join Date: Apr 2003 Location: Singapore Posts: 6,460	when i need to change lens, i dun have time to think about whether dust goes in.....

1st November 2004	#16
Diablo Member Join Date: Feb 2002 Posts: 209	For me, it depend on the situation. If u are in a place where there's a breeze blowing, i would rather let the reflex mirror face to wind, than the rear element of my lens.