Multiple exposures 18 in total for long exposure effect

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creative edge
creative edge Senior Member • Posts: 1,607
Multiple exposures 18 in total for long exposure effect
7

I used to use in camera multiple exposures in camera with my D850 and recently found that the Pentax 645z is capable of multiple in camera exposures. Actually the D850 only goes up to 10 exposures where the Pentax goes way beyond the 10 max of the D850.
Here is one from my recent trip with the family to the Smoky Mountains. These image is of the musical fountain at Pigeon Forge. 
Image taken with the 28-45, 18 images about 15 seconds apart in order to get rid of the crowds. It was extremely busy and crowded.

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Nikon D850 Pentax 645Z
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super_claret Regular Member • Posts: 302
Re: Multiple exposures 18 in total for long exposure effect

creative edge wrote:

I used to use in camera multiple exposures in camera with my D850 and recently found that the Pentax 645z is capable of multiple in camera exposures. Actually the D850 only goes up to 10 exposures where the Pentax goes way beyond the 10 max of the D850.
Here is one from my recent trip with the family to the Smoky Mountains. These image is of the musical fountain at Pigeon Forge.
Image taken with the 28-45, 18 images about 15 seconds apart in order to get rid of the crowds. It was extremely busy and crowded.

Wow, brilliant shot.  Is this an automated feature on the Pentax...does it handle exposure too?  Would be great if this could be done on the GFX100.

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creative edge
OP creative edge Senior Member • Posts: 1,607
Re: Multiple exposures 18 in total for long exposure effect

super_claret wrote:

creative edge wrote:

I used to use in camera multiple exposures in camera with my D850 and recently found that the Pentax 645z is capable of multiple in camera exposures. Actually the D850 only goes up to 10 exposures where the Pentax goes way beyond the 10 max of the D850.
Here is one from my recent trip with the family to the Smoky Mountains. These image is of the musical fountain at Pigeon Forge.
Image taken with the 28-45, 18 images about 15 seconds apart in order to get rid of the crowds. It was extremely busy and crowded.

Wow, brilliant shot. Is this an automated feature on the Pentax...does it handle exposure too? Would be great if this could be done on the GFX100.

thank you, yes it is automated. You decide on the number of exposures the type of blending mode and the interval between shots. I would focus and set exposure with live view and then just trip the shutter. As soon as it was over, live view would come back on telling me it was complete. I like the Pentax implementation better than the Nikon version.

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super_claret Regular Member • Posts: 302
Re: Multiple exposures 18 in total for long exposure effect

creative edge wrote:

super_claret wrote:

creative edge wrote:

I used to use in camera multiple exposures in camera with my D850 and recently found that the Pentax 645z is capable of multiple in camera exposures. Actually the D850 only goes up to 10 exposures where the Pentax goes way beyond the 10 max of the D850.
Here is one from my recent trip with the family to the Smoky Mountains. These image is of the musical fountain at Pigeon Forge.
Image taken with the 28-45, 18 images about 15 seconds apart in order to get rid of the crowds. It was extremely busy and crowded.

Wow, brilliant shot. Is this an automated feature on the Pentax...does it handle exposure too? Would be great if this could be done on the GFX100.

thank you, yes it is automated. You decide on the number of exposures the type of blending mode and the interval between shots. I would focus and set exposure with live view and then just trip the shutter. As soon as it was over, live view would come back on telling me it was complete. I like the Pentax implementation better than the Nikon version.

Does it give you a RAW file or JPEG?  I have an Olympus EM1 mk2 and the live composite mode is interesting, although I’ve never used it to its full potential...this gives a RAW file.

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creative edge
OP creative edge Senior Member • Posts: 1,607
Re: Multiple exposures 18 in total for long exposure effect

super_claret wrote:

creative edge wrote:

super_claret wrote:

creative edge wrote:

I used to use in camera multiple exposures in camera with my D850 and recently found that the Pentax 645z is capable of multiple in camera exposures. Actually the D850 only goes up to 10 exposures where the Pentax goes way beyond the 10 max of the D850.
Here is one from my recent trip with the family to the Smoky Mountains. These image is of the musical fountain at Pigeon Forge.
Image taken with the 28-45, 18 images about 15 seconds apart in order to get rid of the crowds. It was extremely busy and crowded.

.

Wow, brilliant shot. Is this an automated feature on the Pentax...does it handle exposure too? Would be great if this could be done on the GFX100.

thank you, yes it is automated. You decide on the number of exposures the type of blending mode and the interval between shots. I would focus and set exposure with live view and then just trip the shutter. As soon as it was over, live view would come back on telling me it was complete. I like the Pentax implementation better than the Nikon version.

Does it give you a RAW file or JPEG? I have an Olympus EM1 mk2 and the live composite mode is interesting, although I’ve never used it to its full potential...this gives a RAW file.

you end up with a raw file

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JimKasson
JimKasson Forum Pro • Posts: 29,592
Re: Multiple exposures 18 in total for long exposure effect

super_claret wrote:

creative edge wrote:

I used to use in camera multiple exposures in camera with my D850 and recently found that the Pentax 645z is capable of multiple in camera exposures. Actually the D850 only goes up to 10 exposures where the Pentax goes way beyond the 10 max of the D850.
Here is one from my recent trip with the family to the Smoky Mountains. These image is of the musical fountain at Pigeon Forge.
Image taken with the 28-45, 18 images about 15 seconds apart in order to get rid of the crowds. It was extremely busy and crowded.

Wow, brilliant shot. Is this an automated feature on the Pentax...does it handle exposure too? Would be great if this could be done on the GFX100.

You can do it with the GFX 100 by using an intervalometer and merging with median blending in post.

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creative edge
OP creative edge Senior Member • Posts: 1,607
Re: Multiple exposures 18 in total for long exposure effect

JimKasson wrote:

.

Wow, brilliant shot. Is this an automated feature on the Pentax...does it handle exposure too? Would be great if this could be done on the GFX100.

You can do it with the GFX 100 by using an intervalometer and merging with median blending in post.

I find doing it in camera to be much faster and gives the same result

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JimKasson
JimKasson Forum Pro • Posts: 29,592
Re: Multiple exposures 18 in total for long exposure effect

creative edge wrote:

JimKasson wrote:

.

Wow, brilliant shot. Is this an automated feature on the Pentax...does it handle exposure too? Would be great if this could be done on the GFX100.

You can do it with the GFX 100 by using an intervalometer and merging with median blending in post.

I find doing it in camera to be much faster and gives the same result

It may  be faster, but it does not give the same result as median blending.

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Greg7579
Greg7579 Forum Pro • Posts: 10,846
Re: Multiple exposures 18 in total for long exposure effect
1

JimKasson wrote:

creative edge wrote:

JimKasson wrote:

.

Wow, brilliant shot. Is this an automated feature on the Pentax...does it handle exposure too? Would be great if this could be done on the GFX100.

You can do it with the GFX 100 by using an intervalometer and merging with median blending in post.

I find doing it in camera to be much faster and gives the same result

It may be faster, but it does not give the same result as median blending.

I am fascinated by this and what a great image! You learn something every day here on this Board, and Jim forgot more yesterday than I'll ever know.

I am probably embarrassing myself here, but how does this remove the crowds? I of course understand merging and blending in PS, but not sure I understand the median blending. I guess I could study that in PS without asking here. And I guess I could Google the intervalometer instead of embarrassing myself here and admitting I don't know what one is.

I want to try this at night in SE Asia. Is there any other benefit to multiple shots here besides the removal of the crowds? How are the crowds removed?

Edit 2 minutes later: I just Googled Intervalometer and it said this on the first sentence:

"An Intervalometer is an important device that should be part of your camera gear. "

That's enough for me. I'm buying one. Which one do I get. Now … What does it do....

Google Google Google.... I'm Googling now.....

Happy New Year!  I'm hung-over this morning.  Big party last night in the condo.....

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super_claret Regular Member • Posts: 302
Re: Multiple exposures 18 in total for long exposure effect

Greg7579 wrote:

JimKasson wrote:

creative edge wrote:

JimKasson wrote:

.

Wow, brilliant shot. Is this an automated feature on the Pentax...does it handle exposure too? Would be great if this could be done on the GFX100.

You can do it with the GFX 100 by using an intervalometer and merging with median blending in post.

I find doing it in camera to be much faster and gives the same result

It may be faster, but it does not give the same result as median blending.

I am fascinated by this and what a great image! You learn something every day here on this Board, and Jim forgot more yesterday than I'll ever know.

I am probably embarrassing myself here, but how does this remove the crowds? I of course understand merging and blending in PS, but not sure I understand the median blending. I guess I could study that in PS without asking here. And I guess I could Google the intervalometer instead of embarrassing myself here and admitting I don't know what one is.

I want to try this at night in SE Asia. Is there any other benefit to multiple shots here besides the removal of the crowds? How are the crowds removed?

Edit 2 minutes later: I just Googled Intervalometer and it said this on the first sentence:

"An Intervalometer is an important device that should be part of your camera gear. "

That's enough for me. I'm buying one. Which one do I get. Now … What does it do....

Google Google Google.... I'm Googling now.....

Happy New Year! I'm hung-over this morning. Big party last night in the condo.....

This article explains it Greg

https://photoshoptrainingchannel.com/remove-tourists-stack-mode/

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Greg7579
Greg7579 Forum Pro • Posts: 10,846
Re: Multiple exposures 18 in total for long exposure effect

super_claret wrote:

This article explains it Greg

https://photoshoptrainingchannel.com/remove-tourists-stack-mode/

Wow!  I gotta try this.  Fantastic!.  How come it didn't remove that moving water and Ferris wheel?

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JimKasson
JimKasson Forum Pro • Posts: 29,592
Median vs average

Greg7579 wrote:

I am probably embarrassing myself here, but how does this remove the crowds?

Consider one pixel of a four images. One has part of a person in it. The other three does not. Say the part of the person is pure, bright red (255,0,0). Say the same place where the person is not is middle grey (127, 127,127). The median of the four frames is (127,127, 127). It's as if the person were never there.

In camera systems use averaging, because median processing is too computationally expensive. The average value for the above pixel is (159, 127,127). A red ghost of the person remains.

Jim

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creative edge
OP creative edge Senior Member • Posts: 1,607
Re: Median vs average

here is one done in camera using 20 exposures, 18 seconds apart. This place was really crowded as it is a big tourist attraction during Christmas Time.
I have used both ways in camera and median using smart objects in photoshop and saw very little difference if any. 
I have used in camera to reduce noise and to remove people (as long as they are not sitting in the same spot during all of the exposures )

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AudiiDudii Contributing Member • Posts: 530
Re: Median vs average

JimKasson wrote:

Greg7579 wrote:

I am probably embarrassing myself here, but how does this remove the crowds?

Consider one pixel of a four images. One has part of a person in it. The other three does not. Say the part of the person is pure, bright red (255,0,0). Say the same place where the person is not is middle grey (127, 127,127). The median of the four frames is (127,127, 127). It's as if the person were never there.

In camera systems use averaging, because median processing is too computationally expensive. The average value for the above pixel is (159, 127,127). A red ghost of the person remains.

For the benefit of those who don't already know this, median blending is also great for reducing the amount of noise in long-exposure photos for the same reason it works to eliminate people ... two stones / one bird!  Or something like that...

JimKasson
JimKasson Forum Pro • Posts: 29,592
Re: Median vs average

JimKasson wrote:

Greg7579 wrote:

I am probably embarrassing myself here, but how does this remove the crowds?

Consider one pixel of a four images. One has part of a person in it. The other three does not. Say the part of the person is pure, bright red (255,0,0). Say the same place where the person is not is middle grey (127, 127,127). The median of the four frames is (127,127, 127). It's as if the person were never there.

In camera systems use averaging, because median processing is too computationally expensive. The average value for the above pixel is (159, 127,127). A red ghost of the person remains.

I did the math wrong in the last paragraph. The average value is (159,95,95).

Sorry.

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Greg7579
Greg7579 Forum Pro • Posts: 10,846
Re: Median vs average

JimKasson wrote:

JimKasson wrote:

Greg7579 wrote:

I am probably embarrassing myself here, but how does this remove the crowds?

Consider one pixel of a four images. One has part of a person in it. The other three does not. Say the part of the person is pure, bright red (255,0,0). Say the same place where the person is not is middle grey (127, 127,127). The median of the four frames is (127,127, 127). It's as if the person were never there.

In camera systems use averaging, because median processing is too computationally expensive. The average value for the above pixel is (159, 127,127). A red ghost of the person remains.

I did the math wrong in the last paragraph. The average value is (159,95,95).

Sorry.

I know Jim, but don't worry about it.

I picked up on that simple math error within 5 seconds but I didn't want to say anything because we have to stick together here on this Board.  I just let it slide.....

😁

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howardfuhrman Veteran Member • Posts: 4,134
Re: Multiple exposures 18 in total for long exposure effect

Very impressive photo!!!!!

creative edge
OP creative edge Senior Member • Posts: 1,607
Re: Multiple exposures 18 in total for long exposure effect

howardfuhrman wrote:

Very impressive photo!!!!!

thank you Howard

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Velocity of Sound
Velocity of Sound Contributing Member • Posts: 937
Re: Median vs average

This makes sense.  I don't think I'd ever seen it done before.

The technique I've seen a few times has been people using a very strong ND filter and then taking a very long exposure.  If the light is too strong, or perhaps if the crowds are too thick, then you just end up with that "crowd in motion" effect.  But otherwise, it also seems to cancel out crowds.  A really nice example (that I now can't find to link to; I believe it was from Jonas Rask) was taken in one of those Japanese bamboo pathways.  It looked empty, but the photographer said that there were actually a few people strolling by - the long exposure just made them not have much impact on the photo.

It seems taking multiple exposure would probably yield a superior result - it just needs some more processing time.  I'll have to experiment with it; I'd be interested to see how it handles things like motion of leaves in the wind.

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