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Messages - Don Haines

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331
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.

332
Now that's a "Big White" !

333
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.....

334
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....

335
Animal Kingdom / Re: Show your Bird Portraits
« on: November 12, 2014, 09:59:12 PM »
Chickadees and nuthatches, my favourite birds to photograph.

336
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...

337

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...

338
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.....


339
Quote
......
– Records 2K with 16,000 frames per second.

So a 7D2 at 2K 60Hz video cranks out 440Mbytes per minute.... At 16000 fps that becomes 117,333Mbytes per minute or a mere 1,956Mbytes per second. My 32Gbyte CF card would hold 16.3 seconds worth of video....

I think I need a bigger card :)



340
Wedding Photography / Re: Tough LARGE group photo
« on: November 11, 2014, 10:04:17 PM »
When you shoot a panorama... do you stand at one point and pivot or do you move parallel with the subject/wall?

I've done both, but I'm not sure if there is a preferred method when photographing something like this.

Ok, I gots a total noob question to ask, having never done anything like this shot.

Could this have been shot as a pano?  Is that ever a good technique for these wide group shots?

Nooblet minds want to know.

I took a group shot of 20 kids... and that was tough, because they move without knowing it... so a hand is here... and then it is here... it is just a big pain... not to mention, I don't think the focal length was the issue... but the lighting...

I decided one day to try and take a panorama shot of the inside of my gazebo. The cats moved.
I machined myself a 90 degree bracket so I could mount the camera in portrait orientation, with lots of adjustment so that I could center the lens over the pivot point and slide the whole thing back/forth to get the pivot point under the focal point (gets rid of parallax). I mount the arrangement on a LEVEL tripod and start from there.

341
Wedding Photography / Re: Tough LARGE group photo
« on: November 11, 2014, 09:24:18 PM »
Ok, I gots a total noob question to ask, having never done anything like this shot.

Could this have been shot as a pano?  Is that ever a good technique for these wide group shots?

Nooblet minds want to know.

I took a group shot of 20 kids... and that was tough, because they move without knowing it... so a hand is here... and then it is here... it is just a big pain... not to mention, I don't think the focal length was the issue... but the lighting...

I decided one day to try and take a panorama shot of the inside of my gazebo. The cats moved.

342
7D MK II Sample Images / Re: Anything Shot with a 7D MII
« on: November 11, 2014, 05:56:22 PM »
getting ready for the next DR discussion/argument/mud-slinging event :)

All shot with a 70-200F4IS lens.

343
Wedding Photography / Re: Tough LARGE group photo
« on: November 11, 2014, 05:12:55 PM »
Ok, I gots a total noob question to ask, having never done anything like this shot.

Could this have been shot as a pano?  Is that ever a good technique for these wide group shots?

Nooblet minds want to know.

People move.... sometimes a lot and you have them showing up in two places....

344
7D MK II Sample Images / Re: Anything Shot with a 7D MII
« on: November 10, 2014, 10:43:50 PM »
more playing with high ISO in poor light... I hope to get out in the sunshine tomorrow...

345
Portrait / Re: Selfie.
« on: November 10, 2014, 08:31:55 PM »
Now, My turn, dear friend Sanj.
Thanks,
Surapon
I love the first picture.... you look so serious :)

and the fourth picture.... is that the EOS 2D ? ? ? ? ? (check the strap in the reflection :) )

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