December 22, 2014, 11:39:02 PM

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Messages - raptor3x

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16

No. Definitely not. I have used the 7d for the past 5 years and know its sensor very well. There is no way on earth to produce this very image done by erez marom with a canon 7d from a single exposure, no matter how much you pull the sliders in post processing. Just no way.

MagicLantern DualISO...

17
For those that believe they can reproduce similar latitude to the Image discussed in this thread from single exposures from a Canon Sensor, I would be hugely interested to see some evidence, and I mean this in a positive sense, I would like to know just what I'm continuing to do wrong with my Canon gear that in a single exposure generally doesn't produce as much latitude as a single exposure on either the D800 (owned one of these as well) or the a7r.

It can be done using MagicLantern's DualISO feature, but not many people are willing to use that.

18

Personally, the large blotchy color left behind after your regular color noise reduction is what bugs me the most. There is very little that can clean that up nicely. If Adobe could fix their RAW engine to NOT produce that in the first place, then one of my biggest complaints about Canon RAW images would be gone. They still wouldn't have the dynamic range, but, at least the data would be cleaner. I don't really want to spend the couple hundred bucks on C1 Pro, as it's workflow doesn't seem as nice to me as Lightrooms, and it has a limited range of DSLR compatibility...but I may jut do that for the IQ.

I know exactly what you mean, this was the issue i had with the A7 at high ISO.  I'm not sure I saw anything like that in the 7D2 samples I played with but I'd need to check again.  Do you see this on the 5D3 as well or just 7D2 samples?

19
Lenses / Re: Review: Sensor Performance of the 7D Mark II
« on: December 07, 2014, 10:21:19 PM »
I guess I should give it a try. The Dual ISO does sound promising. I'm in the habit of frequently formatting my cards. Do you erase the old files from the EOS folder manually? Or do you keep ML on an SD card? I suppose I should visit the site and read the FAQ again.

In case you didn't see it, I did a comparison between a Sony A7 and a DualISO 5D3 a couple months ago.

20


I noticed a slight amount of something when I denoised the 6400 and 12800 images. Not sure what that is. Hopefully it is simply very early versions of the demosaicing support for the NX1 files in ACR/LR.


I have been testing out CaptureOne Pro. CaptureOne does seem to render a better quality noise with Canon files than LR does. I'm not going to say it's groundbreaking, but it doesn't seem to exhibit that horrid blotchy color noise that I loath so much in my Canon files with Lightroom. Sadly, C1 does not seem to have any support for Samsung cameras... :(


I am beginning to think now that Adobe's algorithms in Lightroom are indeed becoming rather dated. They don't render the data in the RAW files as well as they could be. I don't remember who asserted that in the past, but I think they may be right. Here's to hoping Lightroom 6.x gets a much-needed rewrite of the rendering pipeline, one that eliminates the color blotch with Canon files.


I did notice that LensRentals.com now has the NX1 on preorder:


http://www.lensrentals.com/rent/compact/samsung/samsung-nx1


Woo! Not sure that I'll have a chance to try it out before the end of the year, but I'm glad they have it. They have a number of lenses as well. I think I'd give the NX1 and the 16-50 a try at the very least...but since this is something I'm curious about as an alternative to a 7D II for birds, I may hold off until Samsung releases their 300mm f/2.8 lens first. One thing I did learn recently is there do not seem to be teleconverters for the NX line mount yet. That might be an issue for me...if I picked up the 300mm f/2.8 lens, I would want both 1.4x and 2x teleconverters, and not having them would probably be a deal breaker. Maybe if Canon lenses AF well on the NX1 with an adapter...but I suspect that wouldn't be the case for a while. :'(

I know they've had the NX1 up for pre-order for at least a month or two as I almost tried to order one for testing before an event I shot over the thanksgiving weekend.  As for the weird NX1 noise, I can definitely believe that it could have something to do with the LR conversion although I'm not quite sure how DPReview arrived at their DNG files.  The craziest part of those results to me is that before color noise reduction the NX1 definitely looks better but after you remove the color noise the 7D2 looks better, at least to my eye.  I don't think I've ever seen that happen before.  I've seen cameras become essentially equal after you remove the color noise but never swap positions like that.

21
Nice image...
Would be impossible with my 7D.

You could do it with MagicLantern's DualISO feature.

22
Lenses / Re: Yongnuo EF YN 50mm F/1.8
« on: December 07, 2014, 03:14:14 PM »
I'm surprised they didn't try to differentiate even a little bit by adding a metal mount.  This seems like just flat out IP theft.

23

Quote
I could therefore expose 'to the left', maintaining good detail in the light areas, and brighten the shadows in post processing without compromising quality and without the use of HDR, which would be difficult to do with the hard contrast in this scene.


I'm not sure why he thinks HDR would have been difficult.  This is basically an ideal scenario for using PS to merge multiple exposures into a 32-bit TIFF.

24
Lenses / Re: Review: Sensor Performance of the 7D Mark II
« on: December 06, 2014, 07:37:38 PM »

8k, stereo, HDR, 120fps, extreme wide gamut EVF might get close; not feasible now, but I'd imagine it will be in time

Anyway, in some ways even what can be done now (although hasn't yet) could make an EVF bring quite some pluses over an OVF for some types of shooting (one thing to keep in mind is that most stills are still taken as 2D not 3D and the 3D OVF can give one a rather different impression of what the 2D shoot will look like just due to that alone) although in other cases yeah I'm not sure it would cut it.

For me, the most exciting aspects of the EVF are that they should be able to make them obnoxiously large (OM-1 size or even larger) and that I can imagine the potential to make "mirror" blackout almost imperceptible.  I've been excited about the possibility of the gigantic VF ever since my first EVF in an ancient Canon S3 IS.

25
EOS Bodies - For Stills / Re: Tony wanted to switch to Nikon but Couldn't
« on: December 05, 2014, 05:34:44 PM »
After the release of the D810 Tony was ready to sell off all of his Canon gear and go to Nikon.  Then he found out that switching to Nikon required you to also buy Nikon lenses, which are just not as good.  So reluctantly he has to stay with Canon.  Amazingly it turns out that Canon lenses are hands down major winners head to head.  I guess the little extra DR couldn't overcome the lens issue.  This really amazes me that you would sell all of your stuff as new technology comes out not knowing what is going to come next. 

https://www.youtube.com/watch?v=Jva08HY6uLE

That's not quite what he said.  He said that there are certain lenses (most notably the 70-200ii) in the Canon lineup that are important to him that don't have an equal in the Nikon lineup; he does't make any sort of blanket comment about the Nikon lenses being not as good.

26
Lenses / Re: Review: Sensor Performance of the 7D Mark II
« on: December 05, 2014, 01:39:26 PM »

Interesting. Any chance you have the margin of error as you get up into the higher ISO settings? I'm curious to try this method out on some of the cameras I am interested in buying. I've heard from other astrophotographers that dark current on Sony Exmor sensors is the lowest they have ever seen, and they no longer bother with dark frames as a result. Some don't even bother with dithering, as they haven't seen reason to.

How do they deal with the amp noise at the frame edges? The A7 and both A7Rs I've owned all had pretty severe purple glow when you start pushing up the ISO and it seems like this would be a major problem without dark frames.


I've seen a faint amount of purplish noise in A7r images...across the whole frame though, and only when you stretch really heavily. I haven't seen much in the way of what I would call amp glow, though. Nothing like the amp glow I get with the 5D III anyway. I am not sure about the A7, I've heard it's worse with that camera. If it is amp glow or some other thermal signal, then yes, you would need darks to handle it. In the case of the 5D III, if it presents badly, I just crop a little tighter and exclude the worst of it (because its primarily along the right edge o the frame)...without regulating sensor temp, creating and integrating with darks becomes a major pain.

That's really interesting.  All three A7/A7R bodies I've owned have had significantly worse amp glow (the purple glow near the borders) than my 5D3.

27
Lenses / Re: Review: Sensor Performance of the 7D Mark II
« on: December 05, 2014, 12:27:46 PM »

Interesting. Any chance you have the margin of error as you get up into the higher ISO settings? I'm curious to try this method out on some of the cameras I am interested in buying. I've heard from other astrophotographers that dark current on Sony Exmor sensors is the lowest they have ever seen, and they no longer bother with dark frames as a result. Some don't even bother with dithering, as they haven't seen reason to.

How do they deal with the amp noise at the frame edges? The A7 and both A7Rs I've owned all had pretty severe purple glow when you start pushing up the ISO and it seems like this would be a major problem without dark frames.

28
Lenses / Re: New Lens Rental Business Model
« on: December 03, 2014, 08:36:04 PM »
It looks like the lenses are going to divided into two levels and the higher level is $225 a month.

29
But you're correct, in-viewfinder focus peaking is a game-changer for fast lenses and obsoletes a lot of fuss to phase-af with thin dof.

But as you just discovered, you have to use it to get an idea of the value, so unless Canon adds this to their own lineup die-hard Canon enthusiasts will never know: If Canon doesn't have it, it cannot be any good.

Focus peaking is nice in theory, but my experience with the Sony implementation is that it's accuracy is questionable for fast lenses, especially in low light/high ISO situations.

30
Third Party Manufacturers / Re: Samsung NX-1 Review
« on: December 03, 2014, 11:00:18 AM »
Anyway, I'll see how well it works once I am able to rent one. If it sucks horribly, well, so much for the NX1. :P

Definitely looking forward to your impressions.  If nothing else, Samsung seems to be the only mirrorless manufacturer (except maybe Olympus but to a lesser degree) that really gets it in terms of ergonomics.

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