Go Back   Steve's Digicams Forums > Digital Cameras (Point and Shoot) > Kodak

Thread Tools Search this Thread
Old Jul 14, 2005, 12:33 PM   #1
Senior Member
Join Date: Jun 2005
Posts: 188

To Kodak:
I been useing PASM mode and my Camera Kodak DX6490
will not go to f/2.8, the lowest it will go is f/3.7 Isnt it supposted
to go from f/2.8 to f/8 ? if so why wont it go to f/2.8 in Manual. I
have lost a lot of shots because of this, it's very frustrating. I have tried in 'S' useing Shutter sppeds of 1/1000 to 1 sec and even in 'A' it will only go to f/3.7 so my question is how do I get it to goto f/2.8 ?

Answer From Kodak:
The lens on the DX6490 camera will only open up to f/2.8 on full wide
angle. As you zoom the lens must close the aperture to f/3.7 at full
telephoto zoom. This is typical of standard zoom lenses.
TechJD is offline   Reply With Quote
Sponsored Links
Old Jul 14, 2005, 1:50 PM   #2
Senior Member
DGehman's Avatar
Join Date: Mar 2005
Posts: 319

Don't want to squash your complaint, because I like a good crab as much as anyone, but...

that said...

you're up against optical engineering here. The Kodak guy said "standard" zoom lenses, meaning those under $1000. Aberration (purple fringing and probably bluriness around the edges) would haunt you if the whole zoom range stayed at f/2.8.

Consider, too, that the exposure difference between f/2.8 and f/3.7 (f/4) is 1 stop or 1 EV value. Your 1-stop underexposed pictures should be editable to bump up their exposure and/or brightness/contrast.

The shot below is a composite oftwo - the background is taken at what my DX7630 says is one stop underexposed, like taking a scene at f/3.7 instead of f/2.8. The inset (red border) is what Kodak says is correct exposure... overexposed slightly to my taste. Anyway, a bit of editing can brighten up 1 stop, no problem.

Attached Images
DGehman is offline   Reply With Quote
Old Jul 14, 2005, 8:16 PM   #3
Senior Member
Join Date: Jun 2005
Posts: 188

thats fine for normal photos with out addons
but I have a addon thats about 10" long, thats lowering my stops of light
it's a 5.5X Tokina
and when I try to shoot animals closeup
they come out dark sometimes
cause I have to use a shutter speed of atleast 1/90 to keep it from
bluring when they move, and while tryin to take a photo of a
humming bird forget it, you better be around 1/700 to 1/1000
I tried it in "S" and they come out real dark cause it only goes to A3.7
where A2.8 might give me a photo I could lighten up and be saveable

maybe when I finelly get a real good 2X I might be able to get a photo

TechJD is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 3:35 PM.