July 28, 2014, 07:21:58 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Meh

Pages: 1 ... 33 34 [35] 36 37 ... 47
511
Lenses / Re: Does a lens hood reduce the light?
« on: November 10, 2011, 03:03:25 PM »
I've tested my 70-200 F4 IS with and without its hood...Bottom line: there was no difference in the look of the images. (Did shoot at 200 mm though, so what Neuroanatomist said might the the reason.)

That's exactly the reason, IMO.  If the hood provided adequate flare protection at 200mm, it would vignette heavily with the much wider FoV at 70mm.  So, hoods protect mostly/only at the wide end of zooms.

Adequate or maximum?

512
you guys are very lucky in there photo gears are abundant and the prices are very competitive unlike here in australia all the gears are priced sky high

Yes but on the other hand... you live in Australia!   :D

513
This was the thread... no final post about placing an order though.

http://www.canonrumors.com/forum/index.php/topic,2036.msg42067.html#msg42067

514
My question would be will they charge fees going out of the country?  I always step back and look at things when I have to buy things out of the states...

My understanding is there is no duty and they will ship it by USPS via Canada Post so there will be no brokerage fees.  However, I don't know all that for a fact... another member had the same questions a few days ago and was about to place an order... I'll search to see if he made a final posting about it...

515
Aww I can't believe I missed this...You can sell the 24-105 if u don't need it...that would make the 5D II less than 2k brand new!!  :-*

5D2 body has been on sale in Canada for $1999 and will continue till at least Christmas if there's stock.  I got mine for $1899 about a week ago when a large retailer had a 1-day offer of an extra $100 off any camera over $1000  ;D

I think you can still order from Henry's (www.henrys.ca) for $1999.  Shipping to the States (if that's where you are) and the exchange rate will cost a few bucks extra but still a great buy.

516
Lenses / Re: Changing lenses quickly or safely in the field
« on: November 09, 2011, 06:21:50 PM »
I'm curious. How many of you switch off the camera in-between swapping lenses?

I have forgotten several (many!) times to turn off the camera when changing lenses and even when removing the CF card but normally it's because I've put the camera down for a few minutes so technically it was off I suppose.

517
PowerShot Cameras / Re: PowerShot S100 reviewed and compared to the S95
« on: November 09, 2011, 04:42:50 PM »
do I see right, that there ist very little noise in 6400? Looks greate.
Did you shot in raw, or jpeg?

Can you post other shots too?

So i think i'll go for one, if it available here in germany.
Search for an always in pocket cam.

ISO6400 on the S100 looks less noisy than ISO1600 and almost as good as ISO800 on the S95.

518
PowerShot Cameras / Re: PowerShot S100 reviewed and compared to the S95
« on: November 09, 2011, 04:11:47 PM »
Great post!

By ISO200 the S100 colors start to look a little washed to me (on my display anyway) compared the S95... difference surely due to the CMOS vs. CCD sensors.  Most noticeable is the red tile that starts looking quite pink I think while in the S95 it stays red but just gets noisy.

519
Canon General / Re: New APS-C Camera in February?
« on: November 09, 2011, 01:14:54 PM »

The 1DX was designed and built for professional photographers and they have very specific needs that don't necessarily have anything to do with hobbyists, amateurs, advanced amateurs or just the general public.


In a perfect world Canon would market the next 7D for pros and leave the 70D and below to the hobbyists and amateurs. If they did (again in a perfect world) we would see a cropped version of the 1Dx sensor in the next 7D. This is my wish and it would be awesome! I remember when the 7D came out people were raving how it was a mini-1D, why not keep the tradition alive?

Why would that represent a perfect world? Why would a cropped version of the 1DX sensor necessitate marketing only to pros?

If Canon make a cropped version (APS-C) of the 1DX sensor, it will only have 6.84 MP. do you think either the 'pro" or  Amateur will buy it???
I would like to see canon apply the technology of 1DX sensor on the existing 18MP APS_C and also give us the "low Light" technique ( addition the explosure from 4 adjscent pixels )from the S95 and ends up with a 4.5MP picture. Then we will have the best of both world.

:) I took psycho5's comment to mean the latter... apply the latest and greatest sensor tech for a new ~18MP APS-C sensor and I think that could be what we'll see.  Totally agree that an APS-C crop of the 1DX sensor with 6.9MP is a non-starter.

520
Canon General / Re: New APS-C Camera in February?
« on: November 09, 2011, 09:41:17 AM »
So for the rest of you who actually own a 7D now, what would actually make you buy a newer model, if the sensor is the same? (take into account you'd lose about 15% purchase-price selling old-body and buying new one). And if the sensor is a new one (more than likely), what would you prefer from my options above?

Assuming I could sell my 7D and buy a 7D2 for a net cost of only 15% (about C$225), I would upgrade just for the chance to take that new sweetness out of the box!   ;D   For me, the compelling option from your list would be same 18MP with any improvement in image quality whether that's a little better ISO performance, DR, whatever.

521
EOS Bodies / Re: Final shopping list for tomorrow..
« on: November 09, 2011, 09:16:36 AM »
Why the Wimberly?  Does that or say a Kirk QRC-3 screw right onto the 468MG head?

The Wimberley C-12 screws right onto the 468MG, so I simply unscrewed the RC2 clamp from the 468MG head (two hex screws), and screwed on the C-12.  The Kirk QRC-3 would fit on a 468MG, which has a 3/8" threaded stud, but it looks like you'd need additional parts to retrofit it onto a 468MGRC#.  The Wimberley C-12 comes with the screw you need (and the allen keys in both sizes), and I like that it has three small set screws, vs. just one with the Kirk.

Thanks John!

522
Canon General / Re: New APS-C Camera in February?
« on: November 08, 2011, 11:20:39 PM »

The 1DX was designed and built for professional photographers and they have very specific needs that don't necessarily have anything to do with hobbyists, amateurs, advanced amateurs or just the general public.


In a perfect world Canon would market the next 7D for pros and leave the 70D and below to the hobbyists and amateurs. If they did (again in a perfect world) we would see a cropped version of the 1Dx sensor in the next 7D. This is my wish and it would be awesome! I remember when the 7D came out people were raving how it was a mini-1D, why not keep the tradition alive?

Not sure about the "marketing to pros" part but I think you will get your wish.  It wouldn't take much improvement for a 7D2 to be a mini-1DX.

523
Canon General / Re: Dynamic Range - Digital sensors
« on: November 08, 2011, 07:32:27 PM »
@archangelrichard... What?

Digital sensors have only 4-stops of DR:  Wrong, why do you think that exactly?

Each 14-bit conversion has color and brightness:  Wrong, each photosite is only measured for luminance levels, color is interpolated after the fact by looking at the luminance of adjacent RGB pixels.

Sensors are strictly on or off:  Wrong, each photosite builds up a voltage as photons are absorbed and converted into electrons.  The voltage is measured and encoded by the Analog-to-Digital converter into a Data Number (DN) that represents the luminance level of the photosite.

Accuracy of the 14 bits:  What do you mean?




524
Canon General / Re: New APS-C Camera in February?
« on: November 08, 2011, 07:01:09 PM »
@hjulenissen

See now there you go... I made a simple statement of fact that SNR goes up with signal level and that is too simplistic and you want to get into "image quality" which I specifically wanted to avoid because here we go.  I call a NR reduction algorithm "clever mathematics" but you want to say it's not "clever mathematics"... whether it's clever or not clever is a matter of opinion I guess but I think it's at least a little bit clever.  Can you give me that one?

You're obviously knowledgeable about this topic.   Me too.  Should we compare "credentials"?   :D   Honestly, I don't want to offend you or anyone else.  Someone was offended because I got smited... YES! Probably for starting this so I may deserve it :-[

Many of your points are technically sound.  Sure, counting photons in 4 bins and adding vs. counting in 1 bin is the same total number of photons.  But there will be less signal (fill factor <1) and more shot noise and read noise and therefore lower SNR and DR and you've agreed the accuracy of counting those photons is not as accurate if only as a technical matter.   If the SNR is high enough across the entire image then the whole argument is moot but if not you can go ahead and apply a NR algorithm to try and improve the image quality.

I do agree that the more data you have to work with the better NR algorithms will work.  The question would be where is the sweetspot above which the additional noise due to smaller pixels outpaces the improved application of the NR algorithm.

And why is the DR in the Nikon D7000 16MP sensor (Sony) so high?  If you look up the full-well capacity on sensorgen.info (ooops, that could be another debate) you will see it's very high... probably because they improved the fill factor (i.e. a larger photosite in each pixel, the size of the photosite matters).  They also got the noise down in that sensor.  Result = large DR of 14.   Now look at the Sony A77 (24MP) presumably using at least the same tech as the D7000 sensor and you'll see the full-well is much lower and therefore the DR is only 12.2 so the evidence suggests again that photosite size matters at least to the technical characteristics (again I'm trying to leave "image quality" alone).

Anyway, I apologize to everyone, their families, their friends, and the whole world for starting this.

-1 to myself







525
Canon General / Re: New APS-C Camera in February?
« on: November 08, 2011, 04:31:21 PM »
Some people state that they hope that Canon will stop increases in the number of sensels, or even reverse it. I want to know if their claims have a good, sound reasoning behind it, or if it is folklore....

Yes there is good sound reasoning based in physics and mathematics.  The more signal you have in a given measurement the higher will be the SNR.

Yes I am aware the topic of larger pixels is highly debated hence my attempt at making a precise statement about the technical measurements rather than "image quality".   Yes, under some ideal conditions a higher resolution measurement of a signal and some clever mathematics can result in a signal that is equal and sometimes superior if resolution was a limiting factor.  However, those conditions are not present in digital images where there is low signal levels such as shadow areas or in any low-light shooting.  NR software can only improve images so much.

Sweetspot... how did he define that?  And what did he mean by highest offered resolution.  The spatial resolution of a typical P&S scaled up to FF is something like 200MP yet that is not offered, why?  The bottom line is that there are trade-offs in optical systems and image sensors.

Fair enough... marketing cannot be trusted on its face.   But to say they could save costs by using an archaic process I think is a stretch and marketing itself is a huge part of the reason for offering increasing megapixels... it sells more cameras and perhaps with the current limit of technology they already went a little past the sweetspot at say 24MP APS-C.

Can you further explain your comment about "analog amplification ISO".

Pages: 1 ... 33 34 [35] 36 37 ... 47