iso invariance

Yet another article where the math/information theory doesn't line up with their conclusions. Yes, ISO invariance works, but no, you will not get the same information out if your information density is different. I.e. if all I did was change the ISO but kept the same setting otherwise, the lower

ISO invariance asto experiment

Last night after Neowise sank into the haze I spent some time playing with astrolandscapes on Mary's Peak (west of Corvallis). I did an experiment with the sigma 35/1.4 on the K-3ii aimed at an interesting part of the milky way, astrotracer at 10 seconds, f/1.4, slow shutter NR (darkfield

Re: ISO invariance

On Sun, Jan 29, 2017 at 5:28 PM, Mark Roberts <postmas...@robertstech.com> wrote: > John wrote: > >>On 1/29/2017 11:38 AM, Mark Roberts wrote: >>> Larry Colen wrote: >>> >>>> My gut feeling is that ISO invariance isn't so much doing the >>

Re: ISO invariance

John wrote: >On 1/29/2017 11:38 AM, Mark Roberts wrote: >> Larry Colen wrote: >> >>> My gut feeling is that ISO invariance isn't so much doing the >>> amplification in software, but rather it is closer to having a "perfect >>> amplifier".

Re: ISO invariance

On 1/29/2017 11:38 AM, Mark Roberts wrote: Larry Colen wrote: My gut feeling is that ISO invariance isn't so much doing the amplification in software, but rather it is closer to having a "perfect amplifier". Rather like that "perfectly spherical elephant" beloved o

Re: ISO invariance

Larry Colen wrote: >My gut feeling is that ISO invariance isn't so much doing the >amplification in software, but rather it is closer to having a "perfect >amplifier". Rather like that "perfectly spherical elephant" beloved of physics professors. -- Mark Rober

Re: ISO invariance

t; My gut feeling is that ISO invariance isn't so much doing the amplification > in software, but rather it is closer to having a "perfect amplifier". > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net >

Re: ISO invariance

My gut feeling is that ISO invariance isn't so much doing the amplification in software, but rather it is closer to having a "perfect amplifier". -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visi

Re: ISO invariance

If I remember correctly, there was a discussion on the list related to the color rendering in low light and ISO invariance. I don't rember all the arguments, but I have two factors in mind that may affect the colors. But first, - just in case: have you checked that both the temperature

Re: ISO invariance

differences are. The histogram actually goes to the right at about the same spot. On Fri, Jan 27, 2017 at 5:28 PM, Larry Colen <l...@red4est.com> wrote: Gonz wrote: Ok. I've done some experiments to test this whole ISO invariance subject, which some ascribe almost mythological healing

Re: ISO invariance

oma...@gmail.com> wrote: > Ok. I've done some experiments to test this whole ISO invariance > subject, which some ascribe almost mythological healing powers to > underexposed images. I'll reveal one pair of experimental images > after I have my methodology down. Hence this post. The

Re: ISO invariance

re than >> the stated 14 bits, that way they can multiply at will and have plenty >> of room for the dark regions to come out. > > > I think that what real world iso invariance means to me is that I have a lot > more latitude to under expose by dialing the ISO down, so as n

Re: ISO invariance

that what real world iso invariance means to me is that I have a lot more latitude to under expose by dialing the ISO down, so as not to blow out highlights, and similarly I don't have to worry about shooting at a higher ISO, within a reasonable range. I don't think it means I can go around

Re: ISO invariance

Did you see the updated image. I think that 4 or 5 stops will show some amount of banding, but not enough to make much of a difference. Its when you have maybe 7-10 stops where you should notice a massive difference. If the whole theory that is being bandied about were true, i.e that the

Re: ISO invariance

I just did a set of my front yard with the K-3. Oops, bracketing starts at 400 rather than 100, but it's still about the same. I can't help but wonder if there is something about the way your version of lightroom processes images. Gonz wrote: I still like the better exposed image though,

Re: ISO invariance

That should be 4 stops difference in ISO. On 1/27/2017 5:54 PM, Gonz wrote: Ok. I've done some experiments to test this whole ISO invariance subject, which some ascribe almost mythological healing powers to underexposed images. I'll reveal one pair of experimental images after I have my

Re: ISO invariance

O1600: >>>> >>>> https://www.flickr.com/photos/66982297@N02/32559204535/in/dateposted-public/ >>>> >>>> +4 compensation at ISO 100: >>>> >>>> https://www.flickr.com/photos/66982297@N02/32179978780/in/dateposted-public/

Re: ISO invariance

t; https://www.flickr.com/photos/66982297@N02/32559204535/in/dateposted-public/ >>> >>> +4 compensation at ISO 100: >>> >>> https://www.flickr.com/photos/66982297@N02/32179978780/in/dateposted-public/ >>> >>> The colors are where the extreme

Re: ISO invariance

he right at about the same spot. >> >> >> On Fri, Jan 27, 2017 at 5:28 PM, Larry Colen<l...@red4est.com> wrote: >>> >>> >>> Gonz wrote: >>>> >>>> Ok. I've done some experiments to test this whole ISO invariance >

Re: ISO invariance

, Larry Colen<l...@red4est.com> wrote: Gonz wrote: Ok. I've done some experiments to test this whole ISO invariance subject, which some ascribe almost mythological healing powers to underexposed images. I'll reveal one pair of experimental images after I have my methodology down. Hence thi

Re: ISO invariance

, 2017 at 5:28 PM, Larry Colen<l...@red4est.com> wrote: Gonz wrote: Ok. I've done some experiments to test this whole ISO invariance subject, which some ascribe almost mythological healing powers to underexposed images. I'll reveal one pair of experimental images after I have my metho

Re: ISO invariance

-public/ The colors are where the extreme differences are. The histogram actually goes to the right at about the same spot. On Fri, Jan 27, 2017 at 5:28 PM, Larry Colen <l...@red4est.com> wrote: > > > Gonz wrote: >> >> Ok. I've done some experiments to test this whole ISO i

Re: ISO invariance

Gonz wrote: Ok. I've done some experiments to test this whole ISO invariance subject, which some ascribe almost mythological healing powers to underexposed images. I'll reveal one pair of experimental images after I have my methodology down. Hence this post. The results were so surprising

ISO invariance

Ok. I've done some experiments to test this whole ISO invariance subject, which some ascribe almost mythological healing powers to underexposed images. I'll reveal one pair of experimental images after I have my methodology down. Hence this post. The results were so surprising, that it made me

Re: K-1 and ISO invariance

Gonz wrote: The second set (k20) appears to be the wrong set. oops, It should be https://www.flickr.com/photos/ellarsee/albums/72157625430541230 or http://www.fluidr.com/photos/ellarsee/albums/72157625430541230 Igor might be interested in the set I accidentally sent:

Re: K-1 and ISO invariance

The second set (k20) appears to be the wrong set. On Sun, Jun 26, 2016 at 5:14 PM, Larry Colen wrote: > I've been exploring the K-1 and night photography lately. This set was shot > in the same place, on two different nights. The first night there was a half > moon that had

K-1 and ISO invariance

I've been exploring the K-1 and night photography lately. This set was shot in the same place, on two different nights. The first night there was a half moon that had risen a couple hours previously, the second night there was no light from the moon, but a lot more light from hwy 17 lighting