DVX100 or DVX102? high altitude, low temps?

S

sol

Member
Hi,
I currently use the dvx102 and am preparing to hire 2 dvx100's for an international shoot at high altitude at possibly very low temperatures.

I have 2 main questions.
1. Firstly - what improvements were made to the dvx100 thereby it being known thereafter as the dvx102?


2. Secondly, does anyone have any experience using the dvx100 at high altitude (4000 + meters above sea level) or in low temperatures (0 degrees celcius)?

If so can you please outline any issues experienced which were good and most importantly not so good.

Many thanks to all
Sol
 
First - I've never heard of the DVX102 (maybe that's the European version)???

Second - At those temps I bet you would need some type of warm enclosure for the camera to keep it at a proper operating temperature.

45229245.jpg


I'd recommend something like THIS as a minimum.

45229675.jpg


Third - 4000 meters = approx 13,000 feet! Damn man, what mountain are you climbing?
 
There is an improvement with cine settings, focus adjustment, sync issue is fixed although creating a buzzing sound with the headphones, different color... I believe it is called dvx100a and i am not sure what other features have been added i own the first series dvx... represent...
 
Thanks for the replies,
Yes it is a PAL version DVX102A

Do you know where I may find out more info about the improvements?
What do you know about the Focus Adjustment and sync issues in the DVX100. For this shoot Cine settings are not too important.
Our crew is travelling Peru and a couple of other Sth American locales.

Yes we are taking rain jackets but perhaps the portabrace is the best option. I will need to access the obvious controls. Do you use one of these with dvx100?

Thanks
Sol
 
Sorry, don't have much use for a rain slicker here in Las Vegas....:laugh:
I've heard here from others that have used it and like it.

[size=-1]Peru?? Machu Picchu??? sounds cool...........[/size]
 
wow thats a lot of mega pixels! Very interesting thread.
How high before All video cameras are completely useless at "high" altitudes?
Thanks again
Sol
 
I've seen VIDEO from Machu Picchu that's at 8,000ft so I know video is ok that high.... Come to think of it, they shoot video aboard the space shuttle & space station in orbit so maybe thisiswells is just messing with ya.....
 
The CCD pixels get "clogged" with cosmic dust. It is well documented. You are SOL.
Better to shoot on FILM at high altitudes, or VIDEO will look awful.

When a cosmic-ray particle hits a CCD pixel it causes an increase in charge which is indistinguishable from the arrival of photons. These spurious signals are usually (though not always) confined to a single pixel. Cosmic-ray hits appear as a set of pixels with intense values sparsely scattered over the CCD frame. Typically an exposure of a few minutes might have about a hundred cosmic-ray hits. The location of the hits within the chip is random. If several frames of the same target object or flat field have been acquired (for example to avoid saturation, see above) then the cosmic-ray hits will occur at different positions in each frame and it is possible to detect and remove them by comparing corresponding pixels in the different images and rejecting those with aberrantly large values.
Click to expand...

http://www.starlink.rl.ac.uk/star/docs/sc5.htx/node17.html
 
"makes sense, I guess the shuttle and space station are properly shielded...."

THey have a bigger budget than we do :)
 
sol said:
1. Firstly - what improvements were made to the dvx100 thereby it being known thereafter as the dvx102?
Click to expand...
No improvements. The designation DVX102 is designed to track gray-market imports. I believe the 102 was a Chinese-only model, so if someone outside China has a 102, then they know for sure that they are using a gray-market model.

I'm not 100% sure that the 102=China, but I think it was China where that model# was used.
 
Cosmic rays?! OK, I believe they have an effect, but I've shot video at 10,000 feet (Costa Rica)-no problem.

Now that I think of it, I think I've shot video on an airplane at 35,000 feet, still no problem, and trust me, they aren't shielded...

However, I'm also into CCD imaging with telescopes. There things might get interesting, since the shutter is kept open for many minutes (possibly). Maybe you'll get a few frames with a stray pixel being affected in video?

I don't believe the cosmic ray issue.

Edited:

(OK, I just bothered clicking on the link he included in an earlier post. As I surmised, it is an issue in astrophotography. )

Now I know it isn't an issue in video. Yea, if you are at very high altititudes and you start doing exposures that last many seconds or minutes on *each* frame then you might see something. You won't notice if you do normal video!

-Jerry
 
I've seen a documentary of someone who climbed Everest that was obviously video and not film. And the final shot from the top too!
 
Alright, alright, alright.... the gig is up. thisiswells and I were just giving the newb a hard time for cross-posting. There's no issue with the cosmic rays....:laugh:
Welcome to the club Sol.
 
Barry_Green said:
No improvements. The designation DVX102 is designed to track gray-market imports. I believe the 102 was a Chinese-only model, so if someone outside China has a 102, then they know for sure that they are using a gray-market model.

I'm not 100% sure that the 102=China, but I think it was China where that model# was used.
Click to expand...


If that is so, that means your 24pa footage will be off sync with your recorded sound. If i remember correctly, sound has a two frame lead over video. That could be easily fixed in post by sliding the audio track to the right two frames...
 
I know guys who do skydiving videos, and the videos all look fine. Usually they go up to 13,500ft, but some jumps go as high as 25,000ft. No pressurization, but the cameras stay reasonably warm in the planes.
 
There's NO difference betrween a DVX100A and a 102A, other than the print on the body of the camera. And, Barry, it's not the chinese model (that's the 103), it's the Au/NZ model. As for the cosmic dust, I keep a box in my drawer at work, it's always useful for a practical joke, especially the pink flavour...
 
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