my lens says max aperature 3.5-6.3 . is it 3.5 or 6.3 ?


sglion

New Member
Dec 11, 2009
47
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0
#1
Hi,

My lens says this:

max. aperture: 3.5-6.3
min. aperture: 22

This is a 18-250 mm lens.

So is the max aperture 3.5 or 6.3
Why 2 values in max aperture ?


Thanks,
 

Oct 31, 2009
158
0
0
#2
Hi Bro
from my understanding (i'm a newbie),
3.5 is the max aperture when u use the wide angle
6.3 is the max aperture when you zoomed in all the way
 

sglion

New Member
Dec 11, 2009
47
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0
#3
Oh.

Thanks.
Now got it.
 

mimik07

New Member
Oct 13, 2009
1,331
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East
#4
In short, it means max aperture for 18mm is f/3.5 and that for 250mm is f/6.3

Hi,

My lens says this:

max. aperture: 3.5-6.3
min. aperture: 22

This is a 18-250 mm lens.

So is the max aperture 3.5 or 6.3
Why 2 values in max aperture ?


Thanks,
 

AnsQ

New Member
Mar 21, 2006
1,012
2
0
Melbourne
www.flickr.com
#5
your lens is not a fixed aperture lens.

at 18mm, its biggest aperture is f3.5.
when you zoom to 250mm, the biggest aperture you can use is f6.3.

that is the reason why there are 2 max aperture numbers.
 

night86mare

Deregistered
Aug 25, 2006
25,541
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0
www.pbase.com
#7
and in between it might be f/4.0, f/5.6, accordingly. :)

this is because of the lens design.
 

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