long exposure layer blending


sfoto100

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Nov 29, 2009
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#1
hi

anyone tried long exposure with layer blending before?

i think it should be possible in theory...

pls kindly share your thoughts...
 

night86mare

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#4
hi wk

tks.. wanna save $ on nd grad.. hahaha...
but to be honest, not that much of an outlay is required for nd grad -

ring x 1 at most $15,
filter holder x 1 at most $20
filter tianya x 1 at most $15

$50 is definitely a significant sum, but it pales in comparison to the amount of money anyone spends on other photographic equipment.

of course, it depends on your own personal evaluation - whether you are willing to spend the time to slowly layer blend everything - it is not easy... even after increasing the processing time through shortcuts, i still can spend around 20 minutes to layer blend a straightforward photo (i.e. something at sunset that usually requires 3 photos - rocks, water, sky), and that is assuming that it is a single shot (not pano). for city scenes it will take even longer. i say, $50 is a small price to pay to help reduce occurences of having to layer blend... but that's just my take. you have to make your own decisions, i'm just offering my pov. :)
 

Sep 17, 2008
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#5
haha yea picked up that trick to do layer blending from the mags u provided. yes its possible and the effects are quite stunning too
 

sfoto100

Senior Member
Nov 29, 2009
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#6
but to be honest, not that much of an outlay is required for nd grad -

ring x 1 at most $15,
filter holder x 1 at most $20
filter tianya x 1 at most $15

$50 is definitely a significant sum, but it pales in comparison to the amount of money anyone spends on other photographic equipment.

of course, it depends on your own personal evaluation - whether you are willing to spend the time to slowly layer blend everything - it is not easy... even after increasing the processing time through shortcuts, i still can spend around 20 minutes to layer blend a straightforward photo (i.e. something at sunset that usually requires 3 photos - rocks, water, sky), and that is assuming that it is a single shot (not pano). for city scenes it will take even longer. i say, $50 is a small price to pay to help reduce occurences of having to layer blend... but that's just my take. you have to make your own decisions, i'm just offering my pov. :)
hi wk

tks alot

i see... i didn't do as much landscape as you... i will take your advice seriously... i am considering hitech gnd.. which cost quite a bit... ;p


i am amazed that you can balance your sky and ground using one tianya... don't you also need to blend exposure when the DR is too high?

and another question is how can one use gnd for city scenes? i thought we can only use it when the horizon is straight?


tks alot for your kind advice :)
 

night86mare

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#7
glad the mags were useful, allen. maybe when you have digested the information, you can pass it to other friends who are interested in photography. :)

sfoto - if need be, i will do exposure blending, but more important is that you understand the quality of light, then will make a lot of things easier for you. i have a strong preference for a particular sort of lighting... riotvan will know what that is.. :)

in photoshop, as long as the details are there and you have obtained optimal exposure, you can easily use layers blending options like multiply/screen to balance out exposure, that will be a lot quicker than doing bona fide exposure blending - not to mention you may have movement issues. :)
 

sfoto100

Senior Member
Nov 29, 2009
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#8
glad the mags were useful, allen. maybe when you have digested the information, you can pass it to other friends who are interested in photography. :)

sfoto - if need be, i will do exposure blending, but more important is that you understand the quality of light, then will make a lot of things easier for you. i have a strong preference for a particular sort of lighting... riotvan will know what that is.. :)

in photoshop, as long as the details are there and you have obtained optimal exposure, you can easily use layers blending options like multiply/screen to balance out exposure, that will be a lot quicker than doing bona fide exposure blending - not to mention you may have movement issues. :)
i see... i never try multiply/screen before... i use take two shots, and use brush...

have u tried gnd + 10 stop nd before? if so, that means u got to align your gnd first, then take it out, fix 10 stop nd, then place gnd back right?

i saw posts about Lee big stopper being cooler than b+w 10 stops... and it is better they claimed..

it puzzled me, why cooler color is better?

do u think using rear gelatin nd will produce good IQ when compared to screw in 10 stop nd or big stopper?

sorry for all these noob questions from a newbie
 

ErrikWong

New Member
Jul 10, 2010
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#9
I've tried doing a city shot before with moving traffic and I found the part of matching/masking the light streams to be the most tedious. But that was before I had my 4-stop ND filter... planning to give it a try sometime soon with human traffic perhaps...
 

night86mare

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#11
the nd110 warms the picture, along with the nd400.

for rear gelatin, like i mentioned to someone else before, good luck, you can't see to compose, you have to precompose, remove the mount and mount the gelatin pack near the sea/water... :bsmilie: like using nd110 already not ley chey enough, still want to do such things.
 

sfoto100

Senior Member
Nov 29, 2009
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#12
the nd110 warms the picture, along with the nd400.

for rear gelatin, like i mentioned to someone else before, good luck, you can't see to compose, you have to precompose, remove the mount and mount the gelatin pack near the sea/water... :bsmilie: like using nd110 already not ley chey enough, still want to do such things.
ya hor... remove mount, then will move camera a bit...

anyway i doubt the gelatin filters can perform well compare to the glass nd... but i am just guessing only... bcos i got no proof...
 

night86mare

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#13
i think even if they perform on par, the problems with using them in the field would far outweigh the benefits (i.e. money saved)
 

pinholecam

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Staff member
Jul 23, 2007
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#14
glad the mags were useful, allen. maybe when you have digested the information, you can pass it to other friends who are interested in photography. :)

sfoto - if need be, i will do exposure blending, but more important is that you understand the quality of light, then will make a lot of things easier for you. i have a strong preference for a particular sort of lighting... riotvan will know what that is.. :)

in photoshop, as long as the details are there and you have obtained optimal exposure, you can easily use layers blending options like multiply/screen to balance out exposure, that will be a lot quicker than doing bona fide exposure blending - not to mention you may have movement issues. :)
Pardon for asking, but what do you mean by optimal exposure?
thks
 

Sep 17, 2008
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#15
Pardon for asking, but what do you mean by optimal exposure?
thks
erm. to me it will be bright enough to see all the details, including sky, blurred sea etc:think:

for me i'll do 5 exposures. one for sea, next for horizion, then for clouds. the other 2 will be inbetween.

then must layer mask+ layer blending for me
 

Sep 17, 2008
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#16
glad the mags were useful, allen. maybe when you have digested the information, you can pass it to other friends who are interested in photography. :)

sfoto - if need be, i will do exposure blending, but more important is that you understand the quality of light, then will make a lot of things easier for you. i have a strong preference for a particular sort of lighting... riotvan will know what that is.. :)

in photoshop, as long as the details are there and you have obtained optimal exposure, you can easily use layers blending options like multiply/screen to balance out exposure, that will be a lot quicker than doing bona fide exposure blending - not to mention you may have movement issues. :)
yep i'll still hold on to them for a while then i'll pass it on;) thanks loads
 

ovaltinemilo

Senior Member
Sep 12, 2009
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Sin jia Po lah
#17
erm. to me it will be bright enough to see all the details, including sky, blurred sea etc:think:

for me i'll do 5 exposures. one for sea, next for horizion, then for clouds. the other 2 will be inbetween.

then must layer mask+ layer blending for me
If TS is trying out, maybe lesser no .of exposures would be easier..but do look out not to have a final photo with only gray tones... contrast should be present to make the photo look natural..
:) my 2cents.
 

night86mare

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#19
Pardon for asking, but what do you mean by optimal exposure?
thks
where the histogram is pushed as far right as possible without highlights being blown.

with proper use of gnd, assuming there is sufficient strength, you should be seeing a very "healthy" histogram with details filled up across the entire horizontal axis. the trouble is that not every scene will correspond to this description, so it is really case by case.


that is best case scenario. usually when i can't do that (mainly because my tianya gnd only has one strength), then i will do layer blending.
 

pinholecam

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Jul 23, 2007
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#20
where the histogram is pushed as far right as possible without highlights being blown.

with proper use of gnd, assuming there is sufficient strength, you should be seeing a very "healthy" histogram with details filled up across the entire horizontal axis. the trouble is that not every scene will correspond to this description, so it is really case by case.


that is best case scenario. usually when i can't do that (mainly because my tianya gnd only has one strength), then i will do layer blending.
Thanks for explaining.
Yeah, I was curious about how to get the histogram could be even, esp in situations where it is not a bell curve.
Thanks for the insights, on when to consider layer blending. :)
 

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