Post your 9 or 10 stop ND photos

MalVeauX wrote in post #17927119
Actually, ultrawide angles will do that, even with gentle movement, add to it that it was a 191 seconds (over 3 minutes) and you will get very dramatic blur. Notice it blurs the most towards the edges of the ultrawide where the subject moving through several arc degrees are greater (hence more blur) than the center most points where the change in clouds over arc degrees are not much, so they are hardly blurred. This is why ultrawides blur so nicely at close range and around the edges of the frame, even in short periods of time. Add a bunch of time, and you get dramatic blur.

Very best,

Thank you MalVeaux for detailed explanation.

Haida PRO II Slim 10 Stop

20 seconds:

IMAGE LINK: https://flic.kr/p/EPSk​j7

IMAGE LINK: https://flic.kr/p/E3Yb​nZ

Lovely colours Martin!

xpfloyd wrote in post #17927026
Excellent!

Ursyn wrote in post #17927112
Top-notch image. I assume that clouds were moving really fast to give such an effect.

MalVeauX wrote in post #17927119
Superb!

Actually, ultrawide angles will do that, even with gentle movement, add to it that it was a 191 seconds (over 3 minutes) and you will get very dramatic blur. Notice it blurs the most towards the edges of the ultrawide where the subject moving through several arc degrees are greater (hence more blur) than the center most points where the change in clouds over arc degrees are not much, so they are hardly blurred. This is why ultrawides blur so nicely at close range and around the edges of the frame, even in short periods of time. Add a bunch of time, and you get dramatic blur.

Very best,

Thanks guys

Fantastic looking shots guys!

Here is one I took this morning.

IMAGE LINK: https://cothronphotogr​aphy.smugmug.com …97-160308-XL.jpg&lb=1&s=A

10 stop haida stacked 64 times? to get me a 5 minute shot

IMAGE LINK: https://flic.kr/p/EVXN​9C

IMAGE LINK: https://flic.kr/p/ETCK​E4

I'm curious what you're achieving by stacking vs just taking a long exposure?

I read about this today but haven't had chance to try it out yet, looks like an interesting concept though.

http://digital-photography-school.com …sure-with-photo-stacking/

JohnPh wrote in post #17928529
I read about this today but haven't had chance to try it out yet, looks like an interesting concept though.

http://digital-photography-school.com …sure-with-photo-stacking/

Thanks for that link.

One thing the article does not touch on is gaps. I've done star trail stacking and even in continuous mode there's still a fraction of a second between shots that results in small gaps in the star trail. Wouldn't there be a similar issue with this type of stacking? How would you manage that?

theague wrote in post #17928547
Thanks for that link.

One thing the article does not touch on is gaps. I've done star trail stacking and even in continuous mode there's still a fraction of a second between shots that results in small gaps in the star trail. Wouldn't there be a similar issue with this type of stacking? How would you manage that?

There are issues if there are significant gaps, such as 30 seconds between a set of clouds. It works great on things that are continuous (like water). But it can be hard on very prominent shaped clouds if you miss a few gaps due to whatever. The method uses averages/mean of the images via opacity layers (it's just automated). So if you miss a few gaps, there will be significant data loss and when you do the layers, it will show up. If it's still pleasing to the eye, that's the real question.

The difference between using a single long exposure and several short exposures comes down to noise recovery, and comes down to recovering from error (doing a single 5 minute exposure for example, or longer, has some serious consequences if something happens and you miss your overall shot in a moment where light isn't lasting long enough to do a re-do; such as a bumped tripod, slipped joint, ground giving way slowly, etc). Using shorter subs gives you the ability to have an error, and it not matter nearly as much, as you just miss some data, not the whole image.

Worth a try if you're trying to avoid using lots of ND filters stacked up and want to go the digital route. Granted, when you make an image this way, it's software manipulation of several exposures. It's not just a single photo--that matters to some people. It also means a lot more actuation on your shutter, if you care about that. For extremely long exposures, it's a more friendly method to do it.

Very best,

theague wrote in post #17928524
I'm curious what you're achieving by stacking vs just taking a long exposure?

much much smoother water (much longer exposures to mimmick a 16 stop ND), shooting at optimum settings as opposed to F22 to get desirable shutter speeds.

the files are sooo clean after blending them via stack.

here's a 16 stop firecrest

IMAGE LINK: https://flic.kr/p/DSGk​cq

IMAGE LINK: https://flic.kr/p/EG73​tT

thank you all for the info, I've learned something new today

So when you do these stacks I assume you have to turn off the long exposure noise reduction feature? Is that right?

Mesmer wrote in post #17928808
So when you do these stacks I assume you have to turn off the long exposure noise reduction feature? Is that right?

Probably,

I use long exposure noise reduction on my 5D because it's an old noisy sensor at this point, and 30 second exposures get it noisy real fast. Thankfully LENR works well enough that I can do a 2 minute exposure (single exposure) with literally no noise, so that old tech works really well. For stacks, this is not an issue if gaps are not an issue--so moving water, will not be an issue. It could be an issue for sporadic clouds though. Or things like that, where there are significant differences per frame, if there are delays.

I'm about to start my work week, but I will do some tests with an old 5Dc with LENR on, and do stacks of 30 second subs in unideal conditions to see if it matters enough. I'll do a 2 minute single exposure to compare it to perhaps. All depends on the light.

Very best,

Looking forward to your test images. That's something I'd love to see and will keep an eye on this thread.