Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Sony Alpha dSLR / Konica Minolta dSLR, Sony SLT

Reply
 
Thread Tools Search this Thread
Old Apr 3, 2012, 3:42 AM   #11
Senior Member
 
Marawder's Avatar
 
Join Date: Oct 2010
Location: Geneva, SWITZERLAND
Posts: 677
Default



__________________
Sony α
dSLR-A580
Minolta AF 35-70mm f/4
Sony DT 50mm f/1.8 SAM

Tamron SP AF 17-50mm f/2.8 XR Di-II LD
Tamron SP AF 70-300mm f/4-5.6 Di USD XLD
Marawder is offline   Reply With Quote
Old Apr 3, 2012, 3:44 AM   #12
Senior Member
 
Marawder's Avatar
 
Join Date: Oct 2010
Location: Geneva, SWITZERLAND
Posts: 677
Default



__________________
Sony α
dSLR-A580
Minolta AF 35-70mm f/4
Sony DT 50mm f/1.8 SAM

Tamron SP AF 17-50mm f/2.8 XR Di-II LD
Tamron SP AF 70-300mm f/4-5.6 Di USD XLD
Marawder is offline   Reply With Quote
Old Apr 3, 2012, 4:00 AM   #13
Senior Member
 
Marawder's Avatar
 
Join Date: Oct 2010
Location: Geneva, SWITZERLAND
Posts: 677
Default

The noise is most evident in shadows and areas of consistent color, showing artifacts and an unpleasent graininess.

I didn't do a lot of noise reduction because I was losing detail and images started looking mushy, lacking contrast and depth.

But on every image I applied a value of 30 Color Noise Reduction in Camera Raw.
Luminance Noise Reduction was set between 5 to 15, depending on the shot.
__________________
Sony α
dSLR-A580
Minolta AF 35-70mm f/4
Sony DT 50mm f/1.8 SAM

Tamron SP AF 17-50mm f/2.8 XR Di-II LD
Tamron SP AF 70-300mm f/4-5.6 Di USD XLD
Marawder is offline   Reply With Quote
Old Apr 3, 2012, 7:46 AM   #14
Senior Member
 
TCav's Avatar
 
Join Date: Sep 2005
Location: Washington, DC, Metro Area, Maryland
Posts: 13,572
Default

Noise is almost always pixels being brighter than they should be. Therefore, noise mostly only appears in darker areas. In addition, noise is almost indistinguishable from detail and texture, both to the unaided eye and to noise reduction techniques. Where noise is most evident is in darker, out-of-focus areas where there's no "detail" except that created by the noise.



The amount of noise in the horse's coat is the same as in the out-of-focus woodgrain in the background, but the detail of the horse's coat hides the noise. Notice also that noise is more evident in the darker wood than in the lighter wood and the beige steel panels.

Noise happens. Always. What changes is the conditions under which we notice it. At high ISOs, errant pixels are amplified more than inerrant pixels, so the difference between the errant and inerrant pixels becomes more noticeable.
__________________
  • The lens is the thing.
  • 'Full Frame' is the new 'Medium Format'.
  • "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.

Last edited by TCav; Apr 3, 2012 at 7:50 AM.
TCav is offline   Reply With Quote
Old Apr 4, 2012, 10:56 AM   #15
Senior Member
 
Tullio's Avatar
 
Join Date: Jan 2006
Posts: 7,370
Default

Very usable IMO. Most shots can be cleaned up fairly easy.
__________________

Tullio
Tullio is offline   Reply With Quote
Old Apr 4, 2012, 11:14 AM   #16
Senior Member
 
TCav's Avatar
 
Join Date: Sep 2005
Location: Washington, DC, Metro Area, Maryland
Posts: 13,572
Default

But if you clean up the noise, you'll also lose detail. I'll keep the detail and suffer through some noise.
__________________
  • The lens is the thing.
  • 'Full Frame' is the new 'Medium Format'.
  • "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.
TCav is offline   Reply With Quote
Old Apr 4, 2012, 11:21 AM   #17
Senior Member
 
Tullio's Avatar
 
Join Date: Jan 2006
Posts: 7,370
Default

It depends. I'm not suggesting applying aggressive amounts of NR. With some mild NR, the loss in details may not be very noticeable unless the image is greatly cropped.
__________________

Tullio
Tullio is offline   Reply With Quote
Old Apr 4, 2012, 12:13 PM   #18
Senior Member
 
Marawder's Avatar
 
Join Date: Oct 2010
Location: Geneva, SWITZERLAND
Posts: 677
Default

Quote:
Originally Posted by Tullio View Post
Very usable IMO. Most shots can be cleaned up fairly easy.
I already cleaned up the chroma noise. And applied a +5 luminance noise reduction.
Like TCAV, I can live with noise in most circumstances, detail is more important.

But for night shots, I'd definitely NOT use an ISO bigger than 800.
__________________
Sony α
dSLR-A580
Minolta AF 35-70mm f/4
Sony DT 50mm f/1.8 SAM

Tamron SP AF 17-50mm f/2.8 XR Di-II LD
Tamron SP AF 70-300mm f/4-5.6 Di USD XLD
Marawder is offline   Reply With Quote
Old Apr 4, 2012, 12:40 PM   #19
Senior Member
 
Join Date: Feb 2006
Location: California
Posts: 2,299
Default

Not nearly as good as the $6,000 D4. That post you are referring to (the basketball shots), the out of the camera shots are incredibly clean. For the A35 and any other camera you could convert them to black and white and they would be useable.

But in a pinch it's nice to have the option. I think 8X10 is pushing it though.
__________________
A-mount
E-mount
Canon S95
lomitamike is offline   Reply With Quote
Old Apr 4, 2012, 1:40 PM   #20
Senior Member
 
TCav's Avatar
 
Join Date: Sep 2005
Location: Washington, DC, Metro Area, Maryland
Posts: 13,572
Default

I've seen the A55 do pretty well at up to ISO 1600. I can't think of a reason for your A35 not to do as well.
__________________
  • The lens is the thing.
  • 'Full Frame' is the new 'Medium Format'.
  • "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.
TCav is offline   Reply With Quote
 
Reply


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 8:49 PM.