Powerdoc

Lives in France France
Works as a Plastic surgeon
Joined on Jan 29, 2004

Comments

Total: 8, showing: 1 – 8
On article Sony Alpha 7R II: Real-world ISO invariance study (370 comments in total)

Is it necessary to test the ISO invariance of any new EXMOR sensor ?
MY feeling is that any digital can sensor are iso invariant.

Link | Posted on Aug 24, 2015 at 19:23 UTC as 70th comment
On article Canon announces EF 50mm F1.8 STM lens (309 comments in total)
In reply to:

Renzokuken: The question on everyone's mind. Is this sharper than its predecessor ?

Exactly the same. The official curves have been published, they are exactly the same, even if you can expect a 2 % contrast increase due to the new coating.

Link | Posted on May 11, 2015 at 10:18 UTC
In reply to:

Powerdoc: I am a little bit surprised, that the Canon M3 is not supported dispite the fact it's the same sensor than the Canon 750 and 760.

Well in this case, why Apple bother to sell it's gear in europe ?

Link | Posted on May 5, 2015 at 11:12 UTC

I am a little bit surprised, that the Canon M3 is not supported dispite the fact it's the same sensor than the Canon 750 and 760.

Link | Posted on May 5, 2015 at 06:55 UTC as 13th comment | 9 replies

Photos is not for Aperture's users.
I am angry against Apple for that move.
I have got DxO but I think that I will buy LR 6 when it will be released.

Link | Posted on Apr 17, 2015 at 17:14 UTC as 194th comment
On article Have your say: Best Lens of 2014 (119 comments in total)

How can I vote for the canon 100-400 L : there is no review, just people trying into an event.

Where is the sigma 18-35 1,8 ?
where is the tamron 150-600 ?

Link | Posted on Dec 16, 2014 at 08:05 UTC as 34th comment
On article Zeiss announces 'no compromise' Otus 55mm F1.4 (488 comments in total)
In reply to:

Kodachrome200: I know its good but there is a question of diminishing returns. The Nikkor 50 F1.8 G is actually a superlative lens the will out perform most lens being used for by pro photographers today. This is 20x the price. Even if it was 20x better is there a need for a 20x better lens here. I dont doubt its great. but personally Id rather have my light autofocusing nifty fifty on most shoots. We have 50mm lens now because photographers prefer the framing of 50mm lens to 55mm and 58mm lenses. However 55mm lenses have always been better than 50mm so one has to ask how much less would the difference be if nikon made a 55mm 1.4 with autofocus for like $500. Again even if it was 8x better could the human eye tell it was 8x better. I mean at a certain point something has to become sufficent. We also found years ago in photography that photographers preffered 50s even with the diminished image quality. there is no reason to suspect this isnt still true

the difference is at F1;4. The nikon 1,8 does not work at 1;4.
This zeiss, is the best lens at F1;4. the lack of purple fringing will give fantastic night bokey.

Link | Posted on Oct 8, 2013 at 20:02 UTC
On article Zeiss announces 'no compromise' Otus 55mm F1.4 (488 comments in total)
In reply to:

Kodachrome200: All this stuff about how you dont need AF is sort of misguided. modern cameras are not designed to be manually focused. without using live view or the focus confirmation light your not going to get tac sharp focus. certainly you wont be able to manually focus on the fly the way you were able to with old school SLRs

I own to zeiss distagon (the zeiss 35 and the zeiss 21) : each one allow focus confirmation.
without focus confirmation, it will be very difficult to have a prefect focus without a stigometer.

Link | Posted on Oct 8, 2013 at 09:39 UTC
Total: 8, showing: 1 – 8