super "noisy" pictures!!

kenxo · 28th November 2008

Hi all again, its the super newbie kenxo again

I just came back from the barrage, yeah, its 3.30 in the morning and never felt so compelled to ask for answers again to my new found hobby. I do not know why, but my pictures appears SO GRAINY, especially at the black (darker parts), the picture's not clear or crips, despite me setting ISO to just 100. Settings for the below picture is F7.1 Speed of 5 sec and ISO of 100 using my a300. After i took the picture, i could even notice the GRAINS on my LCD (which is that bad), is it a technical fault or is it some settings that i have so ignorantly set.Do advise...

ps i am trying to post a sample of the picture, but i cant seem to do it on this thread.

Rashkae · 28th November 2008

There's a possibility you set your DRO pretty high maybe?

Anyway, there's a sticky in the Newbie's Corner about forum FAQs. One of them is how to post pictures.

simranjits · 28th November 2008

Use neat image on your images should fix the noise.

pipo999 · 28th November 2008

Originally Posted by simranjits

Use neat image on your images should fix the noise.

most likely true but does not take away the root cause of it ..

weishengg · 28th November 2008

Originally Posted by simranjits

Use neat image on your images should fix the noise.

lol, i use neat image too, but i find noiseware to be a little more effective at keeping the details.
http://www.imagenomic.com/nwpg.aspx

toader · 28th November 2008

Disable DRO like wad Rashkae wrote.

Rashkae · 28th November 2008

Ok, I've taken a look at the pictures, and they're not noisy actually. In fact, for a 30 second exposure, they're very clean. The main thing that I noticed is that they are slightly blurred, most likely because you are shooting at f/20, where lens diffraction kicks in. I suggest reducing your aperture to f/11 or so instead. You'll then also be able to reduce the required exposure time.

kenxo · 28th November 2008

many thanks for all your inputs...appreciate them, i will try again, on another not too sleepy nite

Rashkae · 28th November 2008

Originally Posted by kenxo

many thanks for all your inputs...appreciate them, i will try again, on another not too sleepy nite

If you still have problems, let us know, we'll meet up in the evening and help you get better shots

TME · 29th November 2008

I would suggest don't shoot at smaller than f/16... for most lenses diffraction softening occurs at around f/16 with f/16 being acceptable... I tend to shoot at f/8 or f/16
.

28th November 2008	#1
kenxo New Member Join Date: Aug 2008 Posts: 10	super "noisy" pictures!! Hi all again, its the super newbie kenxo again I just came back from the barrage, yeah, its 3.30 in the morning and never felt so compelled to ask for answers again to my new found hobby. I do not know why, but my pictures appears SO GRAINY, especially at the black (darker parts), the picture's not clear or crips, despite me setting ISO to just 100. Settings for the below picture is F7.1 Speed of 5 sec and ISO of 100 using my a300. After i took the picture, i could even notice the GRAINS on my LCD (which is that bad), is it a technical fault or is it some settings that i have so ignorantly set.Do advise... ps i am trying to post a sample of the picture, but i cant seem to do it on this thread.

28th November 2008	#2
Rashkae Senior Member Join Date: Nov 2005 Posts: 8,267	Re: super "noisy" pictures!! There's a possibility you set your DRO pretty high maybe? Anyway, there's a sticky in the Newbie's Corner about forum FAQs. One of them is how to post pictures. __________________ Alpha

28th November 2008	#3
simranjits Deregistered Join Date: Apr 2008 Posts: 359	Re: super "noisy" pictures!! Use neat image on your images should fix the noise.

28th November 2008	#6
toader Member Join Date: Jul 2008 Posts: 59	Re: super "noisy" pictures!! Disable DRO like wad Rashkae wrote. __________________ Father Earth is sick.Care for him & let him recuperate, OR, come up with a cure to restore his form.

28th November 2008	#7
Rashkae Senior Member Join Date: Nov 2005 Posts: 8,267	Re: super "noisy" pictures!! Ok, I've taken a look at the pictures, and they're not noisy actually. In fact, for a 30 second exposure, they're very clean. The main thing that I noticed is that they are slightly blurred, most likely because you are shooting at f/20, where lens diffraction kicks in. I suggest reducing your aperture to f/11 or so instead. You'll then also be able to reduce the required exposure time. __________________ Alpha

28th November 2008	#8
kenxo New Member Join Date: Aug 2008 Posts: 10	Re: super "noisy" pictures!! many thanks for all your inputs...appreciate them, i will try again, on another not too sleepy nite

29th November 2008	#10
TME Senior Member Join Date: Jan 2002 Location: Clementi Posts: 6,188	Re: super "noisy" pictures!! I would suggest don't shoot at smaller than f/16... for most lenses diffraction softening occurs at around f/16 with f/16 being acceptable... I tend to shoot at f/8 or f/16 .