October 25, 2014, 02:39:07 AM

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Messages - rs

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Technical Support / Re: Question regarding sensor size and image quality
« on: August 22, 2014, 07:39:59 AM »
Another difference is typically the FF body/lens combo will have the optics stopped down more, potentially getting it nearer to optical perfection than the smaller sensor equivalent.

... unless you're shooting macro, with the ff I end up well in the diffraction zone in no time so actually the my crop 60d produces the better images than my shiny new 6d. Plus with macro, to get the same fov crop & ff the latter will have a lower effective f-stop at close distance, so the iso advantage is no good either.
Quite correct - when shooting macro, those rules fall apart.

Technical Support / Re: Question regarding sensor size and image quality
« on: August 22, 2014, 07:31:11 AM »
If FoV and DoF are identical between the different sized sensors, both scenarios will be capturing the same total amount of light as the entrance pupil will be stopped down to be of an identical size.

It could be simply the dynamic range and tonality - to take things to an extreme, you can stop down a FF DSLR to mimic the DoF of a compact camera with the same FoV, yet the compact will be much more likely to have the highlights blown out and an overall flat look to the image. Obviously this difference reduces if the sensor sizes are more similar, but a differences remain.

Another difference is typically the FF body/lens combo will have the optics stopped down more, potentially getting it nearer to optical perfection than the smaller sensor equivalent.

EOS Bodies / Re: How do reds come out in your 5d3 ?
« on: August 13, 2014, 05:16:56 AM »
Intensive reds are often out of gamut.

The easiest way is to select ProPhoto color space and not smaller as Adobe RGB or S-RGB and chose to  work in 16 bit mode.
Then manual  proof the color values ​​into a smaller color space as Adobe RGB and later on  convert to the destinated color space as Adobe RGB or S-rgb.
There are no profile  instructions how a RGB   conversion properly is done between a larger color space and a smaller. Therefore proofing  in the colors in to a smaller color space  is the best way to go with out color clipping in red. But first, make one copy in S-RGB and one in Prophoto and you  immediately  see the difference in the shades of red  in  Prophoto due the much larger color space.
Good luck

The 5D3 can only write a file in Adobe RGB or S-RGB. Do you have experience then that a photo taken in Adobe RGB and uploading in LR or PS gives better result in Prophoto color space? Where would that supplemental detail come for your Prophoto color schema?

It can only write jpegs in those colour spaces. Raw files are taken and stored with the only colour space constraints being that of the sensor itself. The raw converter will then apply a colour space which may or may not introduce further gamut restrictions.

Lenses / Re: Canon EF 11-24 f/2.8L Coming [CR1]
« on: August 10, 2014, 09:31:17 AM »
Dear Friends.
Sorry, I do not want to spend $ 2800 US Dollars for this  new Great/ Super Sharp , Canon EF 11-24 L 2.8, Because I already have  Good Rokinon 12 MM F/ 2.0, <snip>

1. We're not offended by your choice of lenses, you don't need to apologize.

2. It seems you have a crop camera, so it's expected you would be uninterested in an expensive FF UWA zoom.

Thanks, Dear Friend Mr. Antono Refa.

You're welcome, dear buddy.

Well, I have Both FF and Crop Frame Canon Cameras

Then, as you probably know, there are hardly any rectilinear lenses wider than 16mm. If you're not willing to spend $2,800 on one of those few, that's your choice, no need to say you're sorry.

[I wouldn't spend $2,800 on this lens, if released, but I will wait patiently for a price drop.]

THANKSSS, Dear friend Mr.
I am lower level in Technical Know How of Photography , The Stupid question is "  there are hardly any rectilinear lenses wider than 16mm. "= What is  rectilinear Lens ? = The Distortion at the edges of the photos ?
I am fast learner, and Want to learn the new thing in every days.
Have a great Sunday, Sir.

Rectilinear = a wide angle lens which is not a fish eye. They aim to render straight lines perfectly straight, even at the edge of the frame. If you were to fill the frame with a flat subject (eg a test chart) it would be capable of taking a distortion free image of it if lined up perfectly.

Rectilinear lenses do suffer from other forms of distortion which fisheyes (especially stereographic fisheyes) are less susceptible to - any subject which is three dimensional really. Take a group photo for example - people near the edges of the frame are stretched. Anything in the corners looks even more extreme. Even photos of innocent stuff like grass filing the bottom half of the frame and sky in the top - the details in the grass blades will take on the characteristic stretch into the corners, as will any clouds.

The wider the rectilinear lens, the more pronounced this effect will be. In certain scenarios it can be something to be embraced (although not group shots!) 

Underwater / Re: 5D3 housing with 17 TSE
« on: August 09, 2014, 05:42:47 PM »
Waterproof housing? With a tilt and shift?

Lenses / Re: Lens setup for wedding photography
« on: August 05, 2014, 07:15:11 AM »
When I'm the official photographer, I try to avoid using flash as much as possible - unless you gel it and have a perfect wall/ceiling to bounce off, or have the time to set up multiple lights, the results will look significantly worse than a bit of grain due to the higher ISO's (think rabbit in the headlights, or mismatched ambient/artificial colours for near/far objects).

And as a guest, I'd do my utmost to avoid using the flash. Bear in mind you're under no pressure or obligation to get the shots, so why go around drawing attention to you while you're at it? Also, it can create a minor situation if you 'outgun' the photographer by using a big white lens like your 70-200. Keep it subtle.

Don't feel like you have to run around everywhere getting to the best angle and cover every single moment. The photographer is paid to do that. Enjoy the day, pack very light (two lenses max, no flash) and aim to take a few photos, and if you come away with a handful of really magical keepers, that'd be all you could ask for.

For me that'd mean shooting mostly available light, shallow depth of field shots with your 50, and occasionally adding in some creative use of your wide angle lens. Or take the 100L as the second lens for some more subtle head shots or full body candids from a distance. Take your time and go for quality, not quantity. You have no pressure to deliver.

Lenses / Re: advice for new lens?please
« on: August 03, 2014, 05:57:27 AM »
Which 200L have you got? The 2.8 or the 2.0?

EOS Bodies / Re: Get rid of a 1D3 to make room for the inevitable 7D2?
« on: August 03, 2014, 03:26:05 AM »
The 1D3 and any potential 7D replacement aren't direct competitors for each other - so the resale value of your pro grade APS-H camera shouldn't be influenced by any upcoming announcement of a new APS-C body. If I was in your position and was all geared up to move to a smaller sensor, I'd keep hold of my current gear until at the very least the reviews start trickling in, and ideally until the early adopter tax has been dropped.

Bear in mind rumours of the 7D mk II have been circulating for years. With every year that passes it's arguably getting more likely, but check out this prediction for the 7D mk II announcement for Photokina made back in 2011:


EOS Bodies - For Stills / Re: D810 vs. 3D
« on: August 02, 2014, 05:01:49 PM »
Is this about books again? You demand Canon make a 36+ MP camera with WiFi, so you can take better pictures of books? Books from libraries that are available from shops and for download? Canon do make scanners which will do a much better job, and you could also use your WiFi connection for amazon books or apple iBooks to download them for a fraction of the cost and effort of buying/using a 36MP camera.

EOS-M / Re: The firesale begins... EOS M in UK £199
« on: July 31, 2014, 01:06:07 AM »
If it was $199 in the US, I don't see how anyone could resist.  Even if the 22mm lens is the only lens you buy, you just can't do any better for $199 (I'm even talking about the Panasonic GF2 body for $99 plus a lens).
Yes, I'm sure there would be many takers at $199. However, to put this in context, £199 is $336

EOS Bodies - For Stills / Re: Fun Arias rant on APS-C vs. FF
« on: July 29, 2014, 05:57:39 PM »
Zack Arias. Sponsored by Fuji.

Lenses / Re: New Canon L Primes, but Not Until 2015 [CR2)
« on: July 28, 2014, 03:32:58 PM »
I'd still  like to see them best Nikon's 12-24.

PowerShot Cameras / Re: Will the G17 have a 1" sensor?
« on: July 28, 2014, 12:20:27 PM »
That's a pretty neat wish list. However, if true, the lens would be big. It would physically be a 8.9 to 74mm lens, and with the f2.0 aperture at the long end, a 37mm entrance pupil. If that directly translates to the front element size, nothing too massive for a superzoom category camera. That is until you factor in the wide angle (84 degrees) at f1.4, that front element will be big. Possibly much bigger than 37mm.


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