Does long exposure NR effect RAW files?
I have taken a few long exposure pictures ( > 2 sec) with my A200 in RAW mode and there are a few hot pixels showing up. I have the long exposure noise reduction option turned on and I thought that should subtract a dark frame and remove any hot pixels. Does this only apply to JPEGs, or should the RAW files be affected too?
A200, Sony DT 18-70mm, Tamron 70-300mm Di Macro, Minolta 50mm f/1.4
http://bryantakespictures.blogspot.com/
http://www.flickr.com/brdavids

Hey man, it's funny you should ask because every time I look through my long exposure pics in Lightroom, some of the shadows look like they may contain noise, but when I click on it to zoom in (it animates to zoom in,) the noise disappears in the zoomed in version and it's replaced by some approximated color and luminance values that throws off the gradient in the entire picture. It's hard to explain, but it's so far only been visible on raw files. But then again, once I started to do long exposure shots, I stopped shooting in jpg. Regardless of the ugly gradient, I haven't had a single hot pixel on my A200. I'd try it out and see if it would make a difference; from what I've experienced, there isn't a single bit. Then again, that's just me; I could be completely wrong.
--Kiran
Sony Alpha 200, 18-70mm kit lens, 50mm f/1.7, 70-210 f/4 beercan (as of 07/05, whooo!!!)
I've taken a lot of long exposures with my a350, and I always find a dozen or so small but solid blue and red dots. Exposures of 1-5 minutes, ISO 100 ( I do a lot of night photography). I know this has happened in RAW and I'm pretty sure in JPEG too.
Sony A350
Sony 18-70mm 3.5-5.6, Sigma 15mm 2.8, Minolta 75-300mm 4.5-5.6, Minolta 50mm 1.7
"Nice photo, You must have a good camera."
"Nice song, you must have a good guitar."
http://www.calebest.com
Thanks for the replies. I guess there's not much I can do about it other than cloning (or ignoring)?
Wait, they let you do shutter speeds lower than 30 seconds on the other alphas?
--Kiran
Sony Alpha 200, 18-70mm kit lens, 50mm f/1.7, 70-210 f/4 beercan (as of 07/05, whooo!!!)
Yes, when you put the A200 in "M", and then change the shutter speed one notch past 30s, the shutter speed will change to "bulb".
A200, Sony DT 18-70mm, Tamron 70-300mm Di Macro, Minolta 50mm f/1.4
http://bryantakespictures.blogspot.com/
http://www.flickr.com/brdavids
Lightroom will reduce noise automatically if its the hot pixel noise from long exposure. I discovered this when taking some night shots with noise reduction turned off. The 100% zooms are the only true view of the image.
The older I get the better I used to be.
Not related to hot pixels, but I've been using Sony's Image Data Converter software for processing my RAW files, and I've been reluctant to spend the money on Lightroom. Is it worth it? Anything major that Lightroom can do and Sony's software can't do?
A200, Sony DT 18-70mm, Tamron 70-300mm Di Macro, Minolta 50mm f/1.4
http://bryantakespictures.blogspot.com/
http://www.flickr.com/brdavids
I hate sounding like an ad (which is what I do from all my posts about editing in Lightroom,) but from what I read about sony's software, it doesn't seem to be enough, so, I'll install it right now and give you feedback.
--Kiran
Sony Alpha 200, 18-70mm kit lens, 50mm f/1.7, 70-210 f/4 beercan (as of 07/05, whooo!!!)
Hi Bdavids,
The main differences between Photoshop Lightroom and the Sony software is in the workflow and speed of use. Lightroom is much quicker when selecting images, assigning keywords and performing general edits. Perhaps one of the biggest benefits is the fact that Lightroom is non-destructive in it's editing- make a mistake and it is easy to revert back to a different state. Also one can create several different versions of an image for a small amount of disk space- you could have differing crops or maybe a B+W image.
If you are unsure then you could always download the free, 30 day trial and see what you think. That way if you don't like it, or think it's worth the upgrade it's cost you nothing.
HTH
Andrew
Andrew
Head Waiter: AlphaMountWorld.com
Thanks for the tip. I'll download the trial, but I'm worried I might like it and then I'll have to buy it. I'm taking a trip to southern Utah in about a month, so speed and workflow improvements sound pretty nice for going through the hundreds of pictures I'm sure to come home with.
A200, Sony DT 18-70mm, Tamron 70-300mm Di Macro, Minolta 50mm f/1.4
http://bryantakespictures.blogspot.com/
http://www.flickr.com/brdavids
Hey man,
It took me ages for some reason to install the stuff on the disc. I copied a raw file on my desktop and played around with it. Honestly, if there's one thing I hate about lightroom, it's the fact that it doesn't preserve the settings that I used on my camera to shoot a specific image (the contrast, color and sharpness,) and it resets it after opening it. However, since it's non-destructive, the file in windows explorer looks normal, but not in lightroom. With that said, this might be a pretty good thing to add to my workflow, even though it may add a few minutes to see if I like the photo shot in the settings on camera or if I wanna start over from scratch with that edit.
Regardless, like Andrew said, the non-destructive editing is the best part about it and I can link you to free Adobe tutorials teaching you how to use it, and it's from Adobe, so, ain't no piratin' going on. Anyway, I hope you try it out and add to any other differences that I haven't covered so anyone who's reading can stay keep up with this. Hope that helps.
--Kiran
P.S.
A really cool lightroom blog by matt kloskowski:
www.lightroomkillertips.com
Adobe Video Workshop:
http://www.adobe.com/designcenter/video_workshop/
Sony Alpha 200, 18-70mm kit lens, 50mm f/1.7, 70-210 f/4 beercan (as of 07/05, whooo!!!)
I've been fiddling with the Lightroom trial a bit and I think I like it. The biggest difference, aside from the non-destructive editing is the fact that you can do everything in one program. With the Sony software you have to organize and rate the images using Image Data Lightbox (which is slow and likes to crash in Vista) and then edit/convert the RAW files using Image Data Converter. I'm not sure about the interface yet, but I just started using it.
Lightbox Pros (Compared to Image Data Converter):
- Much faster
- Non-Destructive editing
- More control over exposure, color, sharpening, etc.
- Option to convert to DNG format
- Easier to apply previous processing
- Doesn't crash (hasn't yet, at least)
- Handles large batches of RAW files better
- Cropping/Straightening options
- Chromatic aberration removal
Cons:
- I like the side-by-side view in Image Data Lightbox, which I don't immediately see the ability to do in Lightroom, although I haven't looked too hard yet
- Cost (compared to free Sony software)
- Haven't come across anything else that bothers me yet
A200, Sony DT 18-70mm, Tamron 70-300mm Di Macro, Minolta 50mm f/1.4
http://bryantakespictures.blogspot.com/
http://www.flickr.com/brdavids