Print from Airliners.net discussion forum
http://www.airliners.net/aviation-forums/aviation_photography/read.main/378303/

Topic: Canon Eos7D RAW
Username: stef247
Posted 2013-01-19 01:17:19 and read 3548 times.

Hello,

Does somebody can tel me if this is a issue on the Canon 7D, if you photograph in RAW with a iso of 100 there is mutch noise on the picture.
Because I planning a new body to replace my 40D, but I'm not convinced this is the best option for me.
All helps are welcome  

thanks in advance.

Kind regards,

Stef

Topic: RE: Canon Eos7D RAW
Username: shufflemoomin
Posted 2013-01-19 01:41:26 and read 3540 times.

I use a 7D and an original 5D. I notice no noise issues at ISO 100 on the 7D. I'm primarily a concert photographer and happily use the 7D at 3200 & 6400. Of course you'll get some noise at those ISOs, but it's nothing lightroom or Dx0 can't sort out. ISO 100 is totally fine. You'll find the 7D an excellent step up from the 40D. It's the best cropframe Canon currently offers, in my opinion.

Topic: RE: Canon Eos7D RAW
Username: ckw
Posted 2013-01-19 02:36:05 and read 3526 times.

I would say the 7D can be a bit noisy, even at 100 ISO - I found there was always some 'texture' in blue skies. Also it is very intolerant of the slightest underexposure - if you try and correct this in post, shadows get very noisy.

I found the key was to a) be very careful with exposure and b) apply a little luminance noise suppression in ACR when processing the RAWs.

Of course, the very large file also means that often you will be reducing the image in size for the final version which both reduces noise and improves sharpness.

But the 7D is a bit odd - while at 100 ISO it can't produce the silky images of an original 5D, once you go above 800 ISO it begins to show its worth. Obviously shots at 3200 & 6400 will show some noise, but until the 5D3 came along, it was probably your best bet for high ISO shooting.

You also have to look at the entire package. The AF is very good and the ergonomics were a real step forward for Canon. A real joy to use compared to the 40D or similar models.

Cheers,

Colin

Topic: RE: Canon Eos7D RAW
Username: Silver1SWA
Posted 2013-01-19 09:17:50 and read 3472 times.

I agree with everything Colin said. The 7D, on the pixel peeping level will look noisy at low ISOs compared to the 40D but in the real world, it's not an issue as long as you get the exposure right. For airliners.net, you'll probably need to apply small amounts of noise reduction in LR or ACR to avoide a noise/grain rejection in the sky. My workflow involves moving the luminance slider to 15-20 as the first step for every shot taken at ISO 100-400.

If you primarily shoot aviation and don't get wildly creative with processing, the 7D is just fine. However if you also enjoy different types of photography that involve a more creative processing style like HDR or processing that involves popular filter sets from Nik software (for example), it won't take long before image quality begins to break down compared to files from some other cameras out there.

Topic: RE: Canon Eos7D RAW
Username: coninpa
Posted 2013-01-20 14:16:07 and read 3360 times.

There is always noise in a RAW file, even at 100 ISO. It's the purpose of editing software to eliminate it properly. The built-in camera software does it for you if you shoot JPEG. I personally shoot in RAW and use Camera Raw (available in PS and Lightroom). The recent versions are really good at noise reduction without affecting too much the photo.

Topic: RE: Canon Eos7D RAW
Username: KFLLCFII
Posted 2013-01-20 17:59:53 and read 3335 times.

Keep in mind that the individual pixel size on the 7D is actually smaller than that found on the 40D, which is what allows it to have almost twice the amount of megapixels (18.0) than the 40D (10.1) for the same physical sensor size. In other words, the 7D has a greater "pixel density", but this comes as a consequence: Each pixel (since smaller) cannot "tolerate" the same amount of light as the 40D before filling up and losing color clarity...inducing noise faster. But the impressive high-ISO capability of the 7D only goes to show it has better internal noise-handling qualities at high ISO between the sensor and the memory card...Which is not to say the raw data sent from the sensor to the internal processor may not be as impressive as that of the 40D (only the folks at Canon would know), but of course, it's what is sent to the memory card that counts for us anyway.

Here's a good read on this topic: Pixels Are Like Cupcakes. Let Me Explain.

Topic: RE: Canon Eos7D RAW
Username: ckw
Posted 2013-01-21 01:16:51 and read 3302 times.

I think Canon made a mistake with the 7D - if they'd made it, say 12mp or maybe even 15 it would have been a killer camera. Unfortunately by squeezing those extra pixels in they produced a good camera with an issue. But I guess for marketing purposes the numbers rule.

Cheers,

Colin

Topic: RE: Canon Eos7D RAW
Username: braby
Posted 2013-01-21 01:41:47 and read 3296 times.

I have a 7D and a 50D, when shooting side by side and processing for here I find that the 7D requires a little noise reduction whereas the 50 doesn't require any. However as stated in previous post's it's easy to remove, I previously used Canon's own DPP and now use Lightroom and both of these are easy enough to set up noise reduction when importing your photo's.
I think the 7D is a great camera feels so much better in my hands than any previous canon camera I have owned I have been able to use it at it's highest iso setting to get some images that otherwise would have been lost to me granted they wouldn't get on here or be published but i shoot for myself first and foremost.

Topic: RE: Canon Eos7D RAW
Username: Dubi
Posted 2013-01-22 23:11:04 and read 3212 times.

7D has noise issues. In dark areas. And if you clean noise with Photoshop etc., you must know HOW, WHERE and WHY. Best practice is to compensate for EV by +1/2 or +1 stop on the camera itself if background is the sky, before you take a photo. Then is much easier in Photoshop to compensate in minus.
BTW if at least half of scene in the viewfinder is the bright sky, and you have strong shadows then, you can always comfortably compensate for +1EV.

[Edited 2013-01-22 23:45:57]

[Edited 2013-01-22 23:55:52]


The messages in this discussion express the views of the author of the message, not necessarily the views of Airliners.net or any entity associated with Airliners.net.

Copyright © Lundgren Aerospace. All rights reserved.
http://www.airliners.net/