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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Removing lens during shot

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MIKE TESTIN

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Has anyone tried this trick. Is it safe for the sensor?
 
It's been used on one feature shot on RED that I know of.
 
David Lynch likes to do this. (Ref. Lost Highway)

But he doesn't shoot Red. He's into the PD150.
 
This may apply. I've worked in digital capture for the past eight years for still, and removing a lens to clean the sensor is a tricky thing. You are likely to get more dirt/dust that you originally had. Here is a trick I used. I would find a bath room, hopefully one with a shower, and turn on the showers COLD water, and let run for a few minutes. This will help remove some of the airbourne dust. Make sure power is off, as a powered up sensor will attract dust like a magnet. Then I used Sensor Swabs, made especially for digital sensor and Eclipse cleaning solution. Wet the swab, but not dripping wet, wipe swap across sensor in on direction, then turn sensor over to unused side, and wipe in opposite direction. If you need more cleaning, DO NOT USED SAME SWAB GET A NEW ONE. I'm told the the sensor is the same in the Canon 5D digital camera. You can buy swabs to match that sensor size, they are a bit pricey.

http://www.pictureline.com/products/14255/Digital_Survival_Sensor_Swab_Kit_Type_2_-_Eclipse/

If you are just changing lenses, power down and find the least dusty place and swap lenses quickly. Should you get dust, see above.
 
I don't think he wants to clean the OLPF during a shot, I believe he wants to remove the lens for artistic purposes.
 
Ive done it before accidentally during a take 3 weeks ago, was changing from a 17mm to a 50mm but forgot it was running. I just had a look at it then, it defocus' and whites out to pure solid white that's about it.

I would post the video but it was of a semi naked actress lol - so cant.

Andi.
 
profoto said:
This may apply. I've worked in digital capture for the past eight years for still, and removing a lens to clean the sensor is a tricky thing. You are likely to get more dirt/dust that you originally had. Here is a trick I used. I would find a bath room, hopefully one with a shower, and turn on the showers COLD water, and let run for a few minutes. This will help remove some of the airbourne dust. Make sure power is off, as a powered up sensor will attract dust like a magnet. Then I used Sensor Swabs, made especially for digital sensor and Eclipse cleaning solution. Wet the swab, but not dripping wet, wipe swap across sensor in on direction, then turn sensor over to unused side, and wipe in opposite direction. If you need more cleaning, DO NOT USED SAME SWAB GET A NEW ONE. I'm told the the sensor is the same in the Canon 5D digital camera. You can buy swabs to match that sensor size, they are a bit pricey.

http://www.pictureline.com/products/14255/Digital_Survival_Sensor_Swab_Kit_Type_2_-_Eclipse/

If you are just changing lenses, power down and find the least dusty place and swap lenses quickly. Should you get dust, see above.
Click to expand...

If this works for you, fine, but I much prefer electrostatic cleaning which leaves no residue.

Rather than wet swabs, a Arctic Butterfly is much, much safer and 100% effective. It's a snap to use and takes only a few seconds.

Good shooting and best regards,

Leo
 
USlatin said:
I want to see it too
Click to expand...

Time to watch Lost Highway. It's quite a film.

From an interview with Lynch:

Were there new things that you tried in terms of cinematography that you hadn't tried before?

Yes. I never pulled the lens out to defocus something. We developed this thing we called "whacking" where Pete [Deming, the D.P.] and the guys would pull the lens, and then reseat it, and then pull it again.

What would the effect of that be?

Extreme defocusing and jiggling. It's beautiful. I wanted something really out of focus. They cranked the focus ring and it still wasn't out of focus enough so I said to Pete, "That's not good enough" and he said, sort of joking, "All we can do is pull the lens." Then it got really beautiful.​


manuelwenger said:
would love to see how Lynch removes the lens from the PD150 while shooting ;))
Click to expand...

Haha! well the "lens whacking" was in his pre-PD150 days. :bleh:
 
I see, so not removing it, just unseating and reseating it. I could see how this would be pleasing.
 
Leo Ticheli said:
If this works for you, fine, but I much prefer electrostatic cleaning which leaves no residue.

Rather than wet swabs, a Arctic Butterfly is much, much safer and 100% effective. It's a snap to use and takes only a few seconds.

Good shooting and best regards,

Leo
Click to expand...

I'd have to say the wet cleaning does work, and does not leave a residue. I've been working with the larger chip cameras (39mp), with 6X4.5 size sensors (1.5 larger than 35mm frame), and wet cleaning is the way to go, beside I'm not a fan of dry brushes dragging across the sensor, you are just moving dust around, not really removing it. One factor I have to remember, in motion picture the dust will not be as much a factor, but in still, each frame is closely viewed, so cleaning may be more critical.

Also removing the lens with camera powered will attract dust to the sensor.
 
Christopher Grant Harvey said:
What effect does this achieve?
Click to expand...

Removing the lens during a shoot can provide a number of effects depending on how you choose to do it.

By removing the lens and holding it (a lightweight lens!) a short distance in front of the mount you can get a defocus effect that can be similar to a macro shot along with being able to alter the focus plane like a tilt/shift lens. Being hand-held often introduces a very "organic" shake into these effects that can really give a feel/look that can I can only describe as "Lynchian"! (Adjective error... My words have failed me!)

Used appropriately it can be a real mood enhancer!

On top of the above effects light can leak from the gap between the lens and the mount onto the film plane. This light is from outside of the light cone from the lens and can provide some amazingly odd flare effects.

It is a purely creative in-camera effect and will probably take many attempts/takes to get what the shoot needs.

But use this technique with extreme care as damage can occur to both camera and lens if one is not careful.

JohnF
 
Nils J. Nesse said:
Haha! well the "lens whacking" was in his pre-PD150 days. :bleh:
Click to expand...

Well when you call it lens whacking it starts to sound like a possibility. BTW, I added the film to the top of my blockbuster Queue now. It better be more than some beautiful cinematography. :watsup:

What if you had a super low shutter speed, I guess you wouldn't white out and still get the insane defocus look... this must be a fun look.


Could someone find me a link to the electrostatic cleaning solution? I would love to be sure I am looking at the same one being used for Red with success.

JohnF said:
Removing the lens during a shoot can provide a number of effects depending on how you choose to do it.

By removing the lens and holding it (a lightweight lens!) a short distance in front of the mount you can get a defocus effect that can be similar to a macro shot along with being able to alter the focus plane like a tilt/shift lens. Being hand-held often introduces a very "organic" shake into these effects that can really give a feel/look that can I can only describe as "Lynchian"! (Adjective error... My words have failed me!)

Used appropriately it can be a real mood enhancer!

On top of the above effects light can leak from the gap between the lens and the mount onto the film plane. This light is from outside of the light cone from the lens and can provide some amazingly odd flare effects.

It is a purely creative in-camera effect and will probably take many attempts/takes to get what the shoot needs.

But use this technique with extreme care as damage can occur to both camera and lens if one is not careful.

JohnF
Click to expand...


Ohhh.... I see... this sounds fun! :devil:
 
Hey Leo, which arctic butterfly are you using. Is it the 1.6 crop factor model?
 
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