November 23, 2014, 01:52:26 PM

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Messages - Don Haines

Pages: [1] 2 3 ... 231
1
I have used CF tripods down to -55C with no problems. I just came back in after using one for some night sky pictures at -19C.... No problems.

And yes, slip your gear into a plastic bag before you come in to protect it from condensation... That's what I did and after 5 minutes the outside of the bag is soaked and as far as I can tell, it is dry inside.

-55c! where is that? i've been -30c in far north china and that was damn cold so cold my nikon at the time started to struggle to fire after 3 or 4 hours out doors not to mention how fast the batteries drained. and my eye lids kept freezing shut...
in Resolute, NWT, Canada....not that it gets cold in the winter, but we kept the 4X4 in a garage that was heated to -40C......
wow that is cold how do your cameras go in those temps?
take it out of the pelican case, snap a few shots, and back in....then back into the building to slowly warm up before you open the case.....
I also had brought my old Olympus OM-1 that can be left in the cold and still works! I only had the film break once....

2
I have used CF tripods down to -55C with no problems. I just came back in after using one for some night sky pictures at -19C.... No problems.

And yes, slip your gear into a plastic bag before you come in to protect it from condensation... That's what I did and after 5 minutes the outside of the bag is soaked and as far as I can tell, it is dry inside.

-55c! where is that? i've been -30c in far north china and that was damn cold so cold my nikon at the time started to struggle to fire after 3 or 4 hours out doors not to mention how fast the batteries drained. and my eye lids kept freezing shut...
in Resolute, NWT, Canada....not that it gets cold in the winter, but we kept the 4X4 in a garage that was heated to -40C......

3
I have used CF tripods down to -55C with no problems. I just came back in after using one for some night sky pictures at -19C.... No problems.

And yes, slip your gear into a plastic bag before you come in to protect it from condensation... That's what I did and after 5 minutes the outside of the bag is soaked and as far as I can tell, it is dry inside.

4
Technical Support / Re: 7D mark II battery drain
« on: November 22, 2014, 05:33:15 PM »
Just got back from a road trip.....shot 404 pictures over 11 days (mostly in the rain) and the change on the battery is down to about a quarter... Gps is off. Not quite the battery life of the 60D, but certainly much better than the OP.

There was a lot of playing with the menus and a lot of looking at pictures on the screen, so that probably explains some of the loss of battery power.....

5
Software & Accessories / Re: compact hard case?
« on: November 20, 2014, 10:04:09 AM »
Hi all,

Last season i did not take my dslr when i went skiing, but this year i want to have it with me.
As I really don't want to damage it in case of a fall, i'm searching for a (hard) case to fit my 70d with attached 24mm or 40mm pancakes, as i don't really want to take the sigma 17-70 because of the total size.

I was thinking to get something like a semi-hard case, like the ones for compact cameras or portable hard-drives, of course one that would fit the 70d (if there is such thing).

Do you have any suggestions?
How do you take your dslr for skiing?

Thanks
The gold standard are the Pelican cases.

http://www.pelican-case.com/photincas.html

They also have the storm line which has much easier to operate latches.... browse through the website and see what fits your needs...

6
Landscape / Re: Miscellaneous
« on: November 20, 2014, 08:17:07 AM »
This is a perfect example of atmospheric distortion....

It is a picture taken at 600mm across the Bay of Fundy (NS Canada) of a lighthouse 18 kilometers away on a very gusty day.

7
Software & Accessories / Re: Adobe Lightroom 5.7 Now Available
« on: November 19, 2014, 10:48:46 AM »
Downloaded
installed
works on 7D2 RAW files

I am happy :)

8
Photography Technique / Re: Game Ranches for photography
« on: November 19, 2014, 08:32:10 AM »
If you are in Eastern Ontario, Canada..... I suggest "the crazy cat lady's cat ranch" where you can photograph cats in their natural environment and doing such exciting things as sleeping, bringing down prey (the wiley cat kibble), and stalking the elusive red dot.... And outside you can photograph the rare chickadee eating sunflower seeds from the wooden boxes that hang from trees and the squirrels that sit below waiting for seeds to fall off.

It's the same thing as photographing animals in captivity, just taken to a bit more ridiculous of a level.

9
Now that's a "Big White" !

10
Animal Kingdom / Re: Show your Bird Portraits
« on: November 13, 2014, 10:44:38 AM »


The photo doesn't include the cloth bellows that now helps to hide the lens as it protrudes hanging from the gimbal.  Maybe these shots will encourage someone to do something similar - it's a lot of fun up there!!

Jack

Hi Jack,

mmm, this gives me some ideas for a setup in the garden as I'm just busy to do some changes over there.
I have a small hunting blind for the yard... with a power cord for the space heater, a comfy chair, and a 2" thick slab of hard foam under it. It is almost time to set it up again for the winter.....

11
If the sensor moved instantly from one colour to the next, you are only reading the light for a colour a third of the time. This would cancel out having the sensor pixels three times larger. What happens in the real world is that you will have time elapsed while you move from one place to another and the light is wasted while the move is going on..... you now have less usable light than before.

and where does the lens not in use go when it is not in use..... it is still physically present and blocking something else.... or if you move the sensor, same problem..... and you have reduced the amount of usable light by another factor of 3.....

You would be creating a system that was mechanically complex and would decrease the amount of usable light by at least 2 stops... a complex system that would eat batteries like popcorn...

You're not really losing light.  In a standard Bayer-masked sensor, the exposure is taken once and each pixel is covered by a dedicated color patch (R, G, or B) on the color filter array (CFA).  The demosaicing process then interpolates the color values for the neighboring pixels.  With co-site sampling (what this technology is called), each pixel is exposed three times at 1/3 the duration of what would be used in the standard implementation.  In that standard implementation, you're really throwing away 2/3 of the spectrum (ok, not exactly since the transmission curves of the three color patches aren't perfect and non-overlapping), and thus 2/3 of the light.  Co-site sampling collects effectively the same amount light, when you consider summing across multiple pixels.

http://en.wikipedia.org/wiki/Color_co-site_sampling  (Most of the images used in that are from Zeiss.)

Ahhhhhh.....

I misunderstood....

Do you know if anyone has tried to make a sensor with microprisms instead of microlenses? That would seem to me as an interesting way to use more of the incident light....

12
Animal Kingdom / Re: Show your Bird Portraits
« on: November 12, 2014, 09:59:12 PM »
Chickadees and nuthatches, my favourite birds to photograph.

13
Animal Kingdom / Re: Show your Bird Portraits
« on: November 12, 2014, 09:50:55 PM »
Male and female Mallard Duck in a sea of geese...

14

As Coldhands points out, your suggestion that moving something the size of a sensor at 16 kHz is proven false by existing technology. 


Is/are there one or more words missing from the above sentence? ???

No.  Is/are there one or more words you were expecting to see, but don't?  ???
This whole thing is a joke..... a scam.... trolling.....

What you will do with a movable sensor at 16Khz is to drain batteries quickly and shake the sensor apart.

If the sensor moved instantly from one colour to the next, you are only reading the light for a colour a third of the time. This would cancel out having the sensor pixels three times larger. What happens in the real world is that you will have time elapsed while you move from one place to another and the light is wasted while the move is going on..... you now have less usable light than before.

and where does the lens not in use go when it is not in use..... it is still physically present and blocking something else.... or if you move the sensor, same problem..... and you have reduced the amount of usable light by another factor of 3.....

You would be creating a system that was mechanically complex and would decrease the amount of usable light by at least 2 stops... a complex system that would eat batteries like popcorn...

15
EOS Bodies - For Stills / Re: Possibly ok after dropped?
« on: November 12, 2014, 01:55:35 PM »
I believe that the hall will have insurance bundled in as part of the rental agreement, but that the insurance is for damages to the hall and liabilities (guest slipped and hurt themselves). It seems doubtful to me that it would cover damages to your gear, but you never know until you ask.....


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