D750: not happy with lowlight focus..

[ThatCamFan]

"I also see that some photos are just a little off in sharpness on the focus point. ( especially at 1.4)"

Are you trolling? at 1.4 NOTHING will be sharp, period. The focus area is so tiny you won't get the focus correct.

 

[Tharaphita]

Here is a photo from a few days ago. Focussed on the infants eye. Not too happy about sharpness.

No sharpening, raw to jpg.

I like the framing and the moment But sharpness is off there. Seems like the lens front focused. Looks like there is sharp area between baby's face and right fist on shirt. Is it Art series 50? if it is, it should be sharp at 1.4

 

[bvd]

Here is a photo from a few days ago. Focussed on the infants eye. Not too happy about sharpness.

No sharpening, raw to jpg.

I like the framing and the moment But sharpness is off there. Seems like the lens front focused. Looks like there is sharp area between baby's face and right fist on shirt. Is it Art series 50? if it is, it should be sharp at 1.4

no it's not the Art version.

 

[bvd]

"I also see that some photos are just a little off in sharpness on the focus point. ( especially at 1.4)"
Are you trolling? at 1.4 NOTHING will be sharp, period. The focus area is so tiny you won't get the focus correct.

Not trolling, just ignorant I guess, ready to learn. Thanks for that info.

 

[Dimitris Mitrovgenis]

Good answer Rick. It amazes me the questions that some people ask. It shows basic lack of understanding of basic photographic principals. Next someone will complain that their camera can't focus on flying bats (and yes they move faster than kids) in a dark cave.:-D

 

[grazuncle]

Here is a photo from a few days ago. Focussed on the infants eye. Not too happy about sharpness.

No sharpening, raw to jpg.

I like the framing and the moment But sharpness is off there. Seems like the lens front focused. Looks like there is sharp area between baby's face and right fist on shirt. Is it Art series 50? if it is, it should be sharp at 1.4

no it's not the Art version.

... mine is not as good as it was, unsupported. i.e bracing myself against something solid.. door frame or resting elbows on something.

Is this lens soft wide open as it's not the Art version..?

I'd try a good target (contrasty) in the same light, tripod with release/timer and various apertures; Then make a judgement on where the problem lies.. you, the lens, camera, all of them? etc

Give it a chance to see if sharp is possible with that particular kit in that light.

Post something with those criteria..

We're here to help you

 

[StillLearning]

Hi,

great camera, all has been said. However focussing in low light is not that good on my d750.

I find that it still hunts for focus even when the room is dimly lit. I also see that some photos are just a little off in sharpness on the focus point. ( especially at 1.4)

i am using a 24.70 2.8/ sigma 50 1.4

Don't want to blame the camera hope its something i am doing wrong. or expecting too much.

Lots of photos are nice and sharp though..

i tried af S and af C. i was under the impression this camera ' could see in the dark' or is this with the assisting light on?

Any tips would be great.

thanks

Bart

Post some samples. I get good shots at 12800 but they won't be as good as ISO 100 for sharpness. Is the 24-70 a Nikon or Sigma. I have noticed focusing with my Sigma 35 isn't at right on in focus indoor lighting where outdoors it is right on. even in early dawn light.

My Sigma 35 Art works fine in all lights.

That's good for you. Mine is just a little off with the D810 and the D750. probably not noticeable in normal viewed picture but this one (was) my sharpest lens. Now my other lenses that cover the 35mm range look slightly better. Still looks great on the D7100 and D700. But the D700 is long gone to get the D810. Hoping for a firmware update to the Sigma Art. Last update was before the D810 and D750 were introduced. It still can be used outdoors just not my go to lens for indoors anymore.

 

[Dyun27]

Here is a photo from a few days ago. Focussed on the infants eye. Not too happy about sharpness.

No sharpening, raw to jpg.

Look where your focus falls. It's sharpest on the baby's sleeve. Either you moved while you were taking the photo or the lens is front-focusing just slightly. At f/1.4 I wouldn't expect perfectly sharp focus. It generally just doesn't happen. Stop down to f/1.8 or f/2.8 if you want more DOF.

--

Dream Source Studio

Explore Dream Source Studio’s 2,110 photos on Flickr!

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[MPA1]

Swap it for a Sony A7s which apparently will focus in almost no light!

 

[Dyun27]

an other one. This is the sharpness i get i think i have to be happy with . SOOC, RAW, no sharpness applied, little crop.

focused on the front eye near the nose.

With some sharpness applied it looks good to me...

attached full jpg.

Same case I described in the previous photo. Focus is sharpest on the baby's sleeve. Maybe some fine-tuning is in order. At f/1.4 the DOF is just so tiny, it's going to be very difficult to nail focus every time even with a fine-tuned lens.

--

Dream Source Studio

Explore Dream Source Studio’s 2,110 photos on Flickr!

www.flickr.com

 

[Dimitris Mitrovgenis]

an other one. This is the sharpness i get i think i have to be happy with . SOOC, RAW, no sharpness applied, little crop.

focused on the front eye near the nose.

With some sharpness applied it looks good to me...

attached full jpg.

Same case I described in the previous photo. Focus is sharpest on the baby's sleeve. Maybe some fine-tuning is in order. At f/1.4 the DOF is just so tiny, it's going to be very difficult to nail focus every time even with a fine-tuned lens.

--
https://www.flickr.com/photos/jpivkova/

The outer points get confused very very easily. Was it with the centre one?

Can somebody post a sharp picture indoors preferably high ISO?

--
500px.com/dimitrismitrovgenis

 

[MPA1]

an other one. This is the sharpness i get i think i have to be happy with . SOOC, RAW, no sharpness applied, little crop.

focused on the front eye near the nose.

With some sharpness applied it looks good to me...

attached full jpg.

Same case I described in the previous photo. Focus is sharpest on the baby's sleeve. Maybe some fine-tuning is in order. At f/1.4 the DOF is just so tiny, it's going to be very difficult to nail focus every time even with a fine-tuned lens.

--
https://www.flickr.com/photos/jpivkova/

Yes - MF using a camera with focus peaking is probably the way to go for a shot like this at f1.4.

--
Another Godless Atheist for Peace and World Harmony

 

[vbuhay]

Laslo,

Like it or not you just invented a category of (newbie) questions in these forum, "Flying Bat Question", which from here on will be known as FBQ with its TLA (Three Letter Acronym)....and you invented it - LOL.

 

[Andrew 3]

In the two samples you provided I see you're at ISO 800 and 220. Are you purposefully trying to shoot at 1.4 for effect? I personally don't care for only part of someone's face in focus when shooting portraits. I'd suggest stopping it down a bit. f2 - f2.8 for baby alone or f4 and a bit with more than one person, depending where they're at in the focal plane. You have more than enough ISO headroom to work with.

 

[Laslo Varadi]

It might be helpful to see what problems you are having with the D 750 and how other cameras you have had do a better job under similar circumstances. As I said you can't take an action shot under extreme low light. That is why they make flash guns.

 

[Laslo Varadi]

I was afraid of that!!

 

[Dimitris Mitrovgenis]

Laslo,

Like it or not you just invented a category of (newbie) questions in these forum, "Flying Bat Question", which from here on will be known as FBQ with its TLA (Three Letter Acronym)....and you invented it - LOL.

Let's be a bit open minded.Lets forget tracking for minute. My 2nd D750 can not give me a sharp picture that satisfies when I shoot indoors dim light 1/160 F2.8 ISO 8000.I can say that this is low light.Other cameras gave me good results.I don't want to say which brand because some will thinking that I am trolling.

Under this light intensity, what you suggest?I have 3 g-series Lenses 28,50,85 and 1.8.I used these lenses stopped down to 2.8 but got worst pictures than the zoom lens I was using from the previous camera.

 

[Dimitris Mitrovgenis]

It might be helpful to see what problems you are having with the D 750 and how other cameras you have had do a better job under similar circumstances. As I said you can't take an action shot under extreme low light. That is why they make flash guns.

 

[Dimitris Mitrovgenis]

It might be helpful to see what problems you are having with the D 750 and how other cameras you have had do a better job under similar circumstances. As I said you can't take an action shot under extreme low light. That is why they make flash guns.

--
Laslo
http://www.digitalexpressionsphotography.com

I can not get this kind of performance under the same lighting. I thought that these lenses will give me very good performance. Do I need a better lens to get this kind of performance? I know that in Canon land you have to get the 24-70 to get this performance. This is from 5D mk III and 24-70 2.8 II.





And this the best try so far with a bit higher ISO D750. This is 1/250 f2.0 and 12800 ISO.It looks very good but it is really difficult to get the shots.

Shots are ACR auto white balance.Camera Standard





--
500px.com/dimitrismitrovgenis

 

[masiguy]

Laslo,

Like it or not you just invented a category of (newbie) questions in these forum, "Flying Bat Question", which from here on will be known as FBQ with its TLA (Three Letter Acronym)....and you invented it - LOL.