July 31, 2014, 04:53:20 AM

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Messages - K-amps

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16
Being in my late teens in the 80's and witnessing how the DAC's in the CD players would go from  16 to 18 to 20 to 24 etc. every 2-3 years, then the sampling frequency even faster than that....

Apologies for the stupid question in advance:

What's the huge deal with this 14bit wall in Digital Photography? Why can't they make an 16 bit processor and give us 16 stops of DR.... ?



Beyond a certain point, it makes no sense - for example, measurements and analysis by various folks on the web put the capacity of the 5D Mark II's sensor at about 59,000 electrons (ISO 100). That's fewer than the maximum number of different positions achievable with 16 bits. If you can't record 16 bits worth of different electron values, why would you use 20?

Thanks. Again I am no expert, but perhaps they would use 16 or 20 bits for similar logic that the CD player manufacturers used, i.e. larger bit depth converters are more linear in certain bit depths... i.e. offset the data stream from the sensor by 2 bits and then encode/decode. If for nothing else, it might be less noisy maybe. I don't know... just thinking out aloud. I would feel visual acuity is more sensitive than auditory... so why doesn't this have the (marketing) traction that audio component manufacturers had. In the end it was a Sony idea of using direct stream as opposed to a ladder process that satisfied the most die hard audiophiles...

How does 59k electrons convert to 14 bit and what influences the # of electrons. Do EXMOR's do more than 59k electrons?


17
Since the Solution is pseudo crowd sourced, so should be the training manuals or reviews etc. Once I have the basics, I'd be happy to write instructions on the 2 things I would like to use it for, focus and exposure bracketing. EWP, thank in advance for your volunteering for this.

best regards,

18
Do you guys know if ML does Focus bracketing (very helpful for Macro for example).

Yes, I know. Yes, ML does it.

Btw concerning easy installation: There is an implicit reason for this not being 110% advertised, next to the devs hating to write docs: If you cannot install ML with the current procedure you most likely won't be happy with it, it's not completely "works out of the box" and does need some getting into.

Id be happy to work on docs over the summer.  July timeframe.  Would need a path to get additional info on some functions and settings.  I'll drop you an email in private and we can see where we are and where we want it to go.

Extremely kind of you !

19
Being in my late teens in the 80's and witnessing how the DAC's in the CD players would go from  16 to 18 to 20 to 24 etc. every 2-3 years, then the sampling frequency even faster than that....

Apologies for the stupid question in advance:

What's the huge deal with this 14bit wall in Digital Photography? Why can't they make an 16 bit processor and give us 16 stops of DR.... ?


20
You guys are awesome..... Like Cayenne, I too wanted a easy install guide (preferably with screenshots and sugar on top).  Eastwind's is a great start... makes me almost consider doing it.

Do you guys know if ML does Focus bracketing (very helpful for Macro for example).

21
I didn't find a thread for this unloved lens, so I started one: All shots downloaded form facebook since I don't have access to originals right now, so they were heavily compressed....


22
5D MK III Sample Images / Re: 5D MK III Images
« on: April 29, 2014, 09:16:34 AM »
Statue of female commander Sheppard of Mass Effect game (Mange edition).
70-200mm IS II @ 135mm f/5.6, 2 430 EX flashes with color gels.
Obviously focused on the hand ;).

Love it

23
5D MK III Sample Images / Re: 5D MK III Images
« on: April 29, 2014, 09:15:25 AM »
Here's "Smiley" (named Smiley for what appear to be rows of teeth on his jawline)

First image Smiley....second image Smiley with distracting nearby "scenery" that almost caused me to miss the shot!  ::)  ;D

In the second one, you finally got the subject in focus. 

24
5D MK III Sample Images / Re: 5D MK III Images
« on: April 29, 2014, 09:09:44 AM »
I took the 300mm f/2.8L II to a fashion show in the local mall to practice how it worked with the 5D3.

1/400 sec, f/3.2, ISO 400, uncropped. (yes, I accidentally bumped the back wheel at f/3.2 instead of f/2.8).
WB is adjusted due to horrible lightning.

This kind of magical shot I see with the 70-200mk. II, the 200 F2 and the 300 mk.ii they are superb lenses...!

25
Lenses / Re: Canon 300mm f2.8is II with 2.0x teleconverter III
« on: April 16, 2014, 02:28:06 AM »
The photo attached was taken with a 5D2.  AF was at least good, I don't have a whole ream of comparison data with other lenses but I could keep up with birds of prey circling.

Jim

Nice shot of Patrick Stewart. Sorry to go off track a bit; I notice the camera struggling to reproduce rich reds. Same thing happens in my 5d3, when I shoot red flowers, the reds bleed over. If I try and fix in post, the shot looks desaturated, if I only reduce red then it looks weak but I regain some textural detail... correcting the red back to proper saturation and I lose textural detail. Anyone else notice this? till this point I thought it was limited to me only...

26
There is something lacking in the feather detail on all three examples. It makes the bird seem lifeless. Is that bird a
Norwegian Blue?

That's just the sensor in the SX50 showing its age...

27
Buyer beware:

I got a 70-200 2.8ii  refurb. It was as sharp as a new one, although the new one was perhaps sharper. I kept the new one since it was same price as refurb ($1999)

I for a 24-70 2.8ii refurb; It was not even close to a new 24-70 in sharpness that I had sampled earlier ... I sold it at a loss and got a Sigma 24-105 ART. A new 24-70 is sharper than the Sigma but I don't make money off this hobby so for now Sigma is ok for me.

There is a reason some lenses are returned and refurbished (or not). It is up to you to decide if you will get lucky or not.

28
Animal Kingdom / Re: Your best animal shots!
« on: March 01, 2014, 11:12:47 AM »
Photo of an iguana, shot during a vacation in Mexico last October

60D, 70-200 f/4 IS @ 200mm, f/4, 1/250s, ISO 200

Sublime! Just beautiful.

29
Animal Kingdom / Re: Your best animal shots!
« on: February 27, 2014, 05:53:16 AM »
Couple of shots from my recent trip to Tanzania, we were up near the Mara River on the Kenyan Border hoping to see the Wildebeest Migration Crossing the Mara, Loads of Wildebeest but we were about a week early for the Crossing unfortunately.

Getting a little Bored with seeing thousands of Wildebeest doing nothing but eat Grass we started heading to a series of Grass Fires on the Serengeti, ended up the most exciting part of the trip, keeping out of the Fire ourselves and taking Images of Animals confused by the Flames and Smoke.

Absolutely breathtaking shot of Wildebeest by the fire....

What lens did you use for the deer?

30
Photography Technique / Re: Photography fail moments !!!
« on: February 10, 2014, 08:41:06 AM »
We had a friend and his family leaving town so we threw them a farewell party. the last part was Mr. Photographer, needed to take a group shot. So I set the cap on a tripod, hit the timer to 10 secs, hit the shutter and ran to join the group.... had all the folks smiling or making weird faces.... after a while, when the shutter would not go off... we began to lose our expressions and they became a mix of funny face going to "whats going on" sort of face....

So I ran back to the cam, only to discover I had set the mode to "Video".  :-[
 
Needless to say one of the best 20 second videos we gave them as a momento.  ;)

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