Low light autofocus inconsistencies...

A

aced19

Senior Member
Don't know. The only other thing is try to bump your iso up and see what happens.
I have a D7000 with 85 1.8, 50 1.8, and 80-200 2.8 with no issues at all in low light.
But I haven't tried shooting at iso 100 with 1/2 or 1/3 of sec shutter speed.
Something tells me it's the long exposure at low iso. Why I don't know.
I will have to test my camera out and see what happens.
 
P

pedroj

Senior Member
alfaholic said:
Nothing. :) Tried all AF modes, but the problem persist.
Click to expand...

It seems you are not getting anything here to fix your problem...Take them to a Nikon repairer...

YOU say most Nikons have an AF problem well mine does not...

I checked the net and found that most of the problems were user technique...
 
A

alfaholic

Banned
Thabk you. I will take it to Nikon tomorow, that is for sure, just trying to find out am I crazy or something is wrong.
Some people said I am expecting too much from my gear, but if I can not focus at low light with 1.8 lens than why did I paid 2000€ for all this when my wife's P310 works briliantly sharp in all condition for 10 times less money.

I said many people with D7k and 35mm have this problem, I am glad your camera works well, but you do not have 35mm f1.8 G and my other lensea focus very well in low light.
 
P

pedroj

Senior Member
alfaholic said:
Thabk you. I will take it to Nikon tomorow, that is for sure, just trying to find out am I crazy or something is wrong.
Some people said I am expecting too much from my gear, but if I can not focus at low light with 1.8 lens than why did I paid 2000€ for all this when my wife's P310 works briliantly sharp in all condition for 10 times less money.

I said many people with D7k and 35mm have this problem, I am glad your camera works well, but you do not have 35mm f1.8 G and my other lensea focus very well in low light.
Click to expand...

Another that doesn't remember what they write...

Your words OK..."Many people are complaining about this, not just with D7000, but with all other cameras."
This statement here says...BUT WITH ALL OTHER CAMERAS....And no I don't have a 35mm F1.8 it doesn't fit in with what I do
 
R

RON_RIP

Senior Member
I would be interested to learn how many D7000 members consistently use AF-A and how many use AF-S. I am beginning to wonder if AF_S is better for the landscapes and flowers that I primarily shoot. I could understand being in AF-A for objects that might suddenly move, like flowers on a windy day but otherwise I am not sure I should generally be using that mode. And it seems that AF-C is more useful for sports or moving animals. I would sure like your thoughts on this issue.
 
A

aced19

Senior Member
alfaholic said:
Nikon official dealer calibratedy camera.

I used timer, of course. :)
You can see focus point mostly behind the subject, there is no motion blure.
Click to expand...

I downloaded your pics and looked at them. A couple in there was dead on and nothing wrong with them.
So this tells me when you used the timer you moved the camera.
You have to press the shutter to start the timer. When shooting that low of a shutter speed and at 1.8, you can breath on it and it will be out of focus. So touching the shutter caused this. Depending on what AF mode you used ( AF-S, AF-C, AF-A) the camera refocused.

I could be wrong here, but I think that's your problem.
 
A

alfaholic

Banned
I am sorry, but you are wrong. :)
I am using AF-S so there is no refocus. There is not camera movement at all. The subject is more than 2 meter away, so if I moved the camera while pressing the shutter, it moved about 2 microns, but that not happened. :)

My camera is at the service now. I am ready to accept that this is a normal thing, but then I will sell my 35mm, or my D7000.
If I get more than 90% out of focus shots in light lower than strong sunlight and strong black and white contrast, something is really wrong, me or my gear. :)
 
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A

aced19

Senior Member
If you still have your camera and didn't take it in today. Try shooting in interval timer.
Just take 3-5 shots and see what the pictures look like.
Page 155 of your manual.
The reason is the lens will autofocus before each shot.
 
A

alfaholic

Banned
I just picked up my D7000 and 35mm from Nikon, they calibrated autofocus on the lens, the camera is OK.
I need more time to see if there is some differences or just placebo, but I think it is better now.
 
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