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Messages - RGF

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31
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 25, 2014, 01:58:41 AM »
Maybe the "new line of EF lenses" will be an expansion of DO offerings.
Maybe, but it seems unlikely.  He'd have been talking about extending a line, not dropping a cagey hint about something new.

Or could it refer to MF lenses?  Lenses which throw a larger image on the sensor?   :o

32
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: December 24, 2014, 01:03:47 PM »
Is there anyone willing to provide some mathematics as to why averaging let's say smaller pixels together with a S/N of 50 is better than less pixels (but bigger) with a S/N of 100?

Statistically, they are the same since the same number of photons are captured.

But the smaller pixels have two advantages.

First, they allow the photographer the option to "average" them and thus recover the lower resolution but lower noise image of the larger pixel sensor.  Or the photographer can choose to preserve the higher detail from the smaller pixels at the expense of higher noise.  With the larger pixels, that choice isn't available.

Second, modern noise reduction routines are far superior to simple "block averaging" at removing noise and preserving detail.  So, a higher-detail higher-noise (at the pixel level) image can result in an image that, after noise reduction, has both more detail and less noise than an image from a larger pixel sensor.

That's the whole point of images I posted and which I'll repeat here.  After final processing, the smaller pixels (on the left in the image below) produce and image with both better detail and lower noise even when exposed to the same light for the same period of time.



All true if you going to the same size image.  But if you consider both images at 100%, the S/N of the image with large photo sites with be better than the image (again at 100%) with smaller photo sites.

That was the point I was making.


33
EOS Bodies / Re: EOS 6D Mark II to Move Upmarket? [CR1]
« on: December 24, 2014, 12:43:50 PM »
I think the entire market will move up and the 6D M2 will move with it. I don't expect it will be repositioned within the Canon line up.

34
I use the grip about 2/3 of the time on my 5D M3.  I don't use when I want to go light.  I like the extra bulk and size of the grip, and vertical controls. I would never consider using a 3rd party grip; I hate fussing with equipment in the field.  Always seem to fail the worst time.  Not worth the minor savings in price - either in case of actual failure or worrying about failure.

35
EOS Bodies / Re: Poll: Most wanted new features for 5D Mark IV
« on: December 23, 2014, 12:35:40 AM »
Interesting that two competing features are chosen, both by about 50% of the respondents.  These are higher megapixels and the other is better low light noise.

Those don't compete.

For fixed sensor dimension, higher MP means smaller photo site size which leads to lower signal to noise.

No, it doesn't.  Not for the same sensor area.

I like to use this analogy.

Which way do you get more pizza, when you cut the 15" pizza into 8 slices or 12?

A photo site that is larger will have more signal.  For equivalent electronic noise, which is doubtful since the weaker signal will need more, statistic very clearly tell us that the S/N in the larger site will be lower.  The noise from the signal (number of photons reaching the site) is governed by the Poisson distribution and the variance is equal to the signal.  Noise is typically reports as the std dev which is the square root of the variance.  For if the signal is 10,000 the variance is 10,00 and the std dev is 100. S/N is 10,000 / 100 = 100.  If the area is 1/4 the size the signal will be ~ 2,500 with a variance of 2,500 and a std dev of 50.  S/N is 2,500 / 50 = 50.

Which S/N would you rather have, 100 or 50?

36
Lenses / Re: Which Canon Full Frame Camera is For You?
« on: December 23, 2014, 12:27:34 AM »
Nice review but I found the flashing traffic light behind very annoying at times. 

He failed to consider that the replacement cameras, which will NOT all come out at one time, will be (1) more (perhaps much more) expensive and (2) timing will probably be over the next 12-18 months. 


37
EOS Bodies / Re: Poll: Most wanted new features for 5D Mark IV
« on: December 22, 2014, 05:45:16 PM »
Interesting that two competing features are chosen, both by about 50% of the respondents.  These are higher megapixels and the other is better low light noise.

Those don't compete.

For fixed sensor dimension, higher MP means smaller photo site size which leads to lower signal to noise. 

38
EOS Bodies / Re: Poll: Most wanted new features for 5D Mark IV
« on: December 22, 2014, 11:40:39 AM »
Interesting that two competing features are chosen, both by about 50% of the respondents.  These are higher megapixels and the other is better low light noise.


39
Pricewatch Deals / Re: Greentoe
« on: December 18, 2014, 12:07:43 PM »
Has any one used Greentoe yet?  What type of discounts are available?

40
For years I used lithiums and an external quantum battery pack without problem.  I would burst shoot but really push the flash.

I suspect that if the flash is pushed very hard Lithium batteries could get very hot.  I find my imedion get hot when I charge them; I have not pushed them hard when shooting so not sure if they would get hot on discharge.

Bottom line (IMO - not an official statement from Canon - said in case some one follows my thoughts and has a bad results and then wants to sue me :)) don't push your flash unit to the point of exhaustion.

41

When I don't find buyers on a Google search, I'll meet them at a place such as Taco Bell, McDonald's, or in front of a police station.


Always insist on meeting someone in a busy public place.  My favorite is starbucks and I even buy a cup of joe so I am not occupying a seat without buying anything.

Of course, Micky-D works as does nearly any other public area - even library, bank, police station (!), ...My goal is for both parties to feel safe and that the deal is above board and honest.

42
This experience is precisely why I would like to see a way to Buy & Sell here on CR.  But I understand it's not easy for the mods, just more work.  And CR will have to deal with all the scammers/spammers/trash that having a selling forum attracts.

It's like every picnic draws unwanted insects and potential bad weather when all you wanted to do was enjoy the day with some tasty snacks and a good drink.  Sigh...   ::)

Fred Miranda has a buy/sell.  I haven't used it, I hang out here more, but it looks like it might work.

I have sold and bought a bit on FM.  Nice thing is no fees as % of item's price.  Single annual fee which is very reasonable (I think $29?).  Paypal if by credit card costs the seller 3% unless the seller tells the buyer to pay it.  Otherwise paypal friend which is checking account to checking account without any protection.

eBay after all fees, including paypal, is 12-13%.

I have only sold small items on cragslist -- too much spam for my tastes.  Occasionally sell to camera club members - that works well and lots of personal references.

43
Canon General / Re: Canon USA Addresses the Gray Market
« on: December 17, 2014, 12:10:10 PM »
Canon USA, UK, etc are their own P&L centres. Why should they cross subsidise via way of a warranty an item bought from another country. 

Simple answer: ONE company. ONE world. ONE global economy. Not only for Canon, companies, makers, sellers of products. But also for us, buyers, customers.  8)

We don't tell Canon in what countries to manufacture their products. Canon is in no position to tell us, their customers, where to buy their products - as long as they come from their factories. They should be grateful when we spend our money on their products rather than on those from competitors. It would be in Canon's own best interest to keep us, their customers as happy as they possibly can. That includes the very best aftersales service they can possible pony up and offer to us. For all their products, for all their customers, no matter where we live, work and purchase Canon products.

Fair is fair.

ONE company. ONE world. ONE global economy

Really???  Even within the US a company can set up different sales offices to sell to different regions plus a national accounts sales office.  Cost, P/L, bonuses are based upon local results.

By your logic, would it be okay for Canon to require you ship warranty products back to Japan (or some other global local) for servicing?

A small bit of the price of every item Canon sells goes to warranty support.  If you buy a gray market item, Canon USA (or which ever local country) does not get this support.  Cost reassignment will work well - for example a Canon USA tech may make $125 / hr (all in after benefits, ...) while similar position in India may get only $50/hr.  If Canon USA were to rebill Canon India, at what rate?  Canon India set aside only $50 / hr for the repair but Canon USA needs $125.


44
EOS Bodies / Re: High Megapixel Camera Coming in 2015 [CR3]
« on: December 17, 2014, 11:56:32 AM »
All I wish canon came with a camera with higher dynamic range sensor.I don't need high resolution.

Agree on increase in DR, modest increase in resolution would be nice but not as important as increase in DR.

45
Canon General / Re: What's the point of CPS - Silver level?
« on: December 16, 2014, 10:37:56 PM »
You should demand your money back.

They list the benefits.  Its free.  What is not to get?  You get those benefits.  They get a way to send you information to try to sell you more things.  (it's an exchange)
An example of those other things?:  CPS Gold and Platinum. 

is it working?  "and I might upgrade at some point in the future". Hmmmm.

Hi there!

Thanks for reading the part of my post where I said, "Don't get me wrong, I'm not complaining - I realize that you get what you pay for - I'm just curious..."

Wait?  You didn't read that?

Bummer.

Hi!  Don't get me wrong, I enjoyed your post.  I read your whole post and I responded.  I disagree.  Statistically it was bound to happen.  Reading up and down the responses, has anyone agreed with you?

What is there to disagree or agree with?

I posted a question.

Unless you're disagreeing with my assertion that I want to know if there is more to CPS Silver than I currently understand, there quite literally is nothing to disagree or agree with.

In actuality, statistically - it impossible to disagree with a question.  The chance of it happening is 0.

I think you're misreading my post.

"but it seems Silver is more or less just about using minor benefits for the purposes of data collection and mining (equipment owned, type of photography, etc.)" plus lots of support for that.  I disagree with that.  My fault, I assumed you'd understand I disagreed with the declarative statement, and all the support around it.

If you are concerned about data mining, simply give the minimum amount of information.

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