Date   

How to clean sensor

Roni Beraha
 

Hi there.

I am seeing different approaches with different dits when they clean the sensors.

Some say to use plastic air blower, some say you have to use greenclean, some use greenclean stick to clean, some object to that.

So what should be the approach?

Regards,

Erol Roni Beraha
Focuspuller
Istanbul


Re: How to clean sensor

Daniel Gurzi
 

The unfortunate answer that it depends. There are some considerations to be made product to product and type of cleaning.

Product Considerations:
Are you cleaning the sensor, the shutter, the IR filter?
Does the camera have a rotating ND filter wheel?
How is the sensor cavity sealed?

Essentially, a blower is great to get dust and such out of the sensor area, as long as there is no risk of blowing it further toward the sensor, this is what happened with the C300 mk1, and the Alexa Mini. So for those you have to meticulously pick out each piece with a cotton tip applicator. 

I would recommend having at your disposal some cotton tips, Roscoe lens tissues, and then figure out which cleaner you like, there are lots of them, but most of them are basically rubbing alcohol and water. 

So the first step is to get rid of the dust and loose stuff. Then get in and scrub for any grease. And then do a final swipe layer to get rid of any streaks and residue. And there are times when you might have to go over the same sensor or element several times to make sure it's pristine. 

Daniel Gurzi
Biz Dev @ Kitsplit
Rental House Manager for 12 years in NYC


Re: How to clean sensor

Bill Reiter
 

We developed a product that helps address this issue. Our Air Flex cleaning kit uses food grade CO2 with a choice of output nozzles to control air burst pressure. We find that an inert, no moisture content, not harmful to sensors or optics additive content and no unhealthy content for humans, is a great approach. 
Not trying to market this here but people love it. We can send the specs to anyone interested. Hope this helps. Bill Reiter. Pro Video & Film Equipment Co. providfilm@...


Re: How to clean sensor

Richer, Steve
 

I sure don’t agree with using the word “scrub” when it comes to cleaning any optics outside of a clean room environment.

We use blowers, brushes, and swabs, in that order. I have anyone touch the glass with swabs as an absolute last resort. Especially with Amira’s or Alexa Mini’s. The cover glass is very delicate and prone to scratching easily.

I prefer the Visible Dust blower, which supposedly has a charge which helps lift dust off the surface. If that doesn’t work, we use the Arctic Butterfly. Again, when it spins it imparts slight charge in hope that any contaminant will lift off easier.

The VDust Plus is a good liquid to use with swabs, and their 1.0 swabs are made for full frame sensors. I tell people to use a swab once, then throw it away. If you reuse, you risk picking up dirt and scratching the glass.

I’m sure I sound like an ad for Visible Dust, but I’ve tested every cleaning product I can get my hands on...which has been a lot over the years.

Best,

Steve

 

ignature_457954919

Steve Richer

Camera Technician

NFL FILMS

NATIONAL FOOTBALL LEAGUE

E: steve.richer@...

 

 


Re: How to clean sensor

Daniel Gurzi
 

Thanks, Steve. I should have clarified. It's "scrubbing" proportional to working with delicate elements. But there are times when you see a grease smudge and anything less than a firm hand with a soft applicator won't do it, and then once it's removed, you go back to the blow and swab to clean up the residue.

I stay away from brushes as I find that many people re-use them and don't store them properly, so a piece of dirt or sand gets into the brush and then you get these awesome circular scratches all over your elements. Saw it happen on a set of Master Primes years ago. Each element was a separate "incident" for the insurance company, which meant 7 deductibles...it was not pretty. 

Daniel Gurzi
Biz Dev @ Kitsplit


Card write error

Roni Beraha
 

Hi there.

In our shoot today, in the middle of a take, alexa mini stopped recording and this warning appeared 'card reliability at risk. Please back up the data and erase the disk.'

So we changed the card. Everything that was recorded was there.

After that everything went smoothly until it happened again with a different card.

Any explanations are welcomed.

Best regards

Erol Roni Beraha
Focuspuller
Istanbul


Re: Card write error

Greg Taylor
 

Hi Erol,

I had this happen to me a couple months ago. We were shooting down in Florida with the Amira. While I know you were shooting with the Alexa, it’s possible the incidents are related. 

What seemed to be happening for me was that the battery mount plate was slightly loose and when you would get tired and set down the camera to rest, it would put just enough pressure on the battery or connection to have a brief lapse of power.  When the camera booted back up sometimes this screen would pop up. I recall once when I was still rolling on a long long take, the producers started talking about the next scene and we set down the cameras to stretch. Camera had to reboot and same warning screen popped up. Being the last shot of the show and no cards around, late at night, I had to just keep going on the same card. No issue or lost data but scary as all get out. I’d advise to check the connections and screws holding the battery in place. Again, just what was happening to us with another camera by the same lovely Arri Group. Maybe the lesson is to never set down your camera, but that thing gets heavy with a big Canon zoom. Maybe your battery voltage got just a tid bit too low. 

On a side note, I’ve seen this sort of issue seemingly come from buffering problems when a card write speed is slower than the data flowing in. Worth a check even though it was on Canon cameras. 

Good luck ,

Greg Taylor
Currently visiting snowy Montreal 
Director of Photography & Co-founder Backpacker Films, LLC
--


On Dec 12, 2017, at 8:00 AM, Roni Beraha <eroniberaha@...> wrote:

Hi there.

In our shoot today, in the middle of a take, alexa mini stopped recording and this warning appeared 'card reliability at risk. Please back up the data and erase the disk.'

So we changed the card. Everything that was recorded was there.

After that everything went smoothly until it happened again with a different card.

Any explanations are welcomed.

Best regards

Erol Roni Beraha
Focuspuller
Istanbul


Re: Card write error

tobias@...
 

Hi Erol,
your issue reads as something that ocurred to me almost a year ago. Despite the fact that a loose power connection will always kill the main power to the camera itself and therefore obviously a take. I understood that your Mini was still powered when it cut the take, correct? Nevertheless back to my case: I called up Arri Service for assistance. They held a programming glitch responsible for the recording stop. The next SUP solved the issue. At the end they could not really figue out the circumstances directly. They assumed a certain and even simple combination of personal user settings must have caused it.
After updating the software it never happened again. That was three SUPs ago. You should save a log file then upgrade the Mini and your wireless remote system (just in case too) to the newest SUP which is 5.1. If all that fails please contact Arri Service in Munich (+49.89.38092121) and send them the log file.
I hope it will help.
All the best,
Tobias

Tobias Sebastian Kownatzki
1st AC

tobias@...
http://www.imdb.com/name/nm1310441/


Re: How to clean sensor

Mako Koiwai <mako1foto@...>
 

First step should always be filtered air:

https://www.amazon.com/gp/product/B003BYEXVY/ref=oh_aui_search_detailpage?ie=UTF8&psc=1



makofoto, s. pasadena, CA


Card write error

Roni Beraha
 

The camera has been sent to Arri. I will share the details of the outcome.

Thank you for your inputs

Regards

Erol Roni Beraha
Focuspuller
Istanbul


Re: Card write error

Nathan Armstrong
 

Did this issue involve 256GB Lexar cards? Purchased recently?

I had one go bad on a shoot a month ago. Also I spoke to another DIT who was on a shoot with five new cards, and all five failed. Seems like Lexar may have had a bad batch recently.

Nathan Armstrong
DIT
Minneapolis, MN


Re: How to clean sensor

Vincent Taroc
 

Hi Bill,
 
Do you have a link to that product?
 
Vince
(Who will remember to sign with his full name, job/title, and location in the future)


Sent from Yahoo Mail for iPhone

On Wednesday, December 6, 2017, 7:28 AM, providfilm via Groups.Io <providfilm@...> wrote:

We developed a product that helps address this issue. Our Air Flex cleaning kit uses food grade CO2 with a choice of output nozzles to control air burst pressure. We find that an inert, no moisture content, not harmful to sensors or optics additive content and no unhealthy content for humans, is a great approach. 
Not trying to market this here but people love it. We can send the specs to anyone interested. Hope this helps. Bill Reiter. Pro Video & Film Equipment Co. providfilm@...


TVLogic 055A oled VS SmallHD 702 Bright

Lorand Marton
 

Hello,


Please share opinions, but from a 1st AC's perspective
Which one would you choose and why?

A) 055A Oled TV Logic
B) 058W TV Logic
C) Small HD 702 Bright
D) Transvideo Starlite RF (for the Alexa SXTW)

I have to come up with the best solution for cam op / dop , 1st AC, and Director's monitor

I believe that 055A would be best for the DoP; 058 for 1st AC and the Starlite RF for the Director.
The company already bought a SmallHD, but have no clue about it when it comes to pulling focus on it, so I'd like to avoid it, or have it for the Director.

Let me know if you guys recommend other setups.

Cheers,

Lorand Marton,

Assistant Camera / Junior 
romania / eu


Re: TVLogic 055A oled VS SmallHD 702 Bright

Art Adams
 

Most of my assistants prefer TV Logic for the high bright function and the focus assist, which is apparently better than some other monitors.

OLEDs are generally gorgeous but not very bright, so not great for outdoor focus. I do prefer OLED for myself, but assistants hate them (unless they're 17" and the assistant has a FIZ).

DPs and assistants are looking for very different things.

--
Art Adams
Director of Photography
San Francisco Bay Area


Card write error

Roni Beraha
 

They were indeed.

The cards have been changed as well.

Regards

Erol Roni Beraha
Focuspuller
Istanbul


Re: TVLogic 055A oled VS SmallHD 702 Bright

Emmanuel SUYS
 

Hi Lorand,

After testing most monitors during shoots and comparing again recently
whilst at IBC, I decided to go for the Transvideo Stargate 7".  It's
well built, extremely straightforward and simple to use through a series
of dedicated buttons. The quality of the screen is excellent for judging
focus. The right tool for the right job.

My 2 cents
Manny, Beyrouth Lebanon

On 21/12/17 00:18, Lorand Marton wrote:

Let me know if you guys recommend other setups.
-- 1st Asst Cinematography - 1st Asst Kinematografie - 1er Asst
Photographie Cinématographique *16-35-HD-HiSpeed *HiSpeed Operator
*Digital On Set Supervision *bvk-SSFV *European based *Mobil
+491608036889 *emmanuel at suys.de *Cinematography Mailing List
Moderator - CML


Re: TVLogic 055A oled VS SmallHD 702 Bright

Andy Hoehn
 

Please share opinions, but from a 1st AC's perspective
Which one would you choose and why?

A) 055A Oled TV Logic
B) 058W TV Logic
C) Small HD 702 Bright
D) Transvideo Starlite RF (for the Alexa SXTW)

I’ve owned and used a TV Logic 071 for several years. It’s a bit heavy but works well.

I recently purchased a SmallHD 702 Bright and it works very well for pulling focus. Besides being very bright, off axis viewing is very good and I like the zoom feature for critically focusing.

That being said, I most often use my 17 inch Sony OLED with my Preston when pulling focus on a digital show.

Andy Hoehn
First Assistant Camera
Atlanta, GA


Re: TVLogic 055A oled VS SmallHD 702 Bright

Lorand Marton
 

Thanks Art for your thoughts, my dillema is regarding the other 2 products, the smallhd 702 was already bought by the company so i have to find the best use for it (probaboy it will be assigned to the director, but then again having the sxtw, thought that the transvideo's starlite rf (with wireless integrated would be better choice for a portable director's monitor, which is also oled pannel)

The question remains open as follows:

1)Has anyone used the Transvideo Starlite RF out there? If yes, how are interferences? Is it lagging? How about in door use etc.
2) how do you feel regarding the smallhd 702 bright, from a 1stAC's perspective? MI'm guessing that most of the seasoned DoP's would prefer the 055A from TV logic instead of small hd (though, they are the same price, and yes, even myself would trade in the bigger, brighter pannel for the smaller 5inch tv logic)

On Dec 21, 2017 05:26, "Art Adams" <art.cml.only@...> wrote:
Most of my assistants prefer TV Logic for the high bright function and the focus assist, which is apparently better than some other monitors.

OLEDs are generally gorgeous but not very bright, so not great for outdoor focus. I do prefer OLED for myself, but assistants hate them (unless they're 17" and the assistant has a FIZ).

DPs and assistants are looking for very different things.

--
Art Adams
Director of Photography
San Francisco Bay Area


Re: TVLogic 055A oled VS SmallHD 702 Bright

Stu McOmie
 

My 702 has broken a number of times - the build quality is awful, but it is decent for focus. I prefer the peaking tool to the focus assist tool with the SmallHD software.
The Starlite is a very nice monitor all round, but the screen seems a little soft to me in comparison to others, so not so great for pulling focus.

I'd agree with 055A for the DP, 058 for AC and either Starlite RF or the SmallHD (+receiver) for director.

Stu McOmie
AC
Norwich/London, UK


Re: TVLogic 055A oled VS SmallHD 702 Bright

MARK FOERSTER
 

Let me know if you guys recommend other setups.

I bought the 702 bright and it’s real nice and bright - but if you set the Pluge to 5%, you have to back the backlight off so much that the monitor is not really showing you wysiwyg.
I was kinda disappointed in that as I’m still shooting and exposing/grading in-camera for many clients - due to my disappointment in log grading (that’s another rant)
However if youre shooting log/raw and just over laying a LUT then actual precision of exposure is not as important say a stop up or down. It’s great + you gots all the scopes etc.



Mark Foerster csc
Foerster Productions
Toronto
905 922 5555