feraudy

Lives in France Clamart, France
Works as a Technical Writer
Joined on Jan 4, 2002
About me:

Love taking pictures to show you how beautiful France
is.

Comments

Total: 38, showing: 1 – 20
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In reply to:

alcaher: 500mm, who dont want a lens like that?

Is the 12-24 for just APs-C? or is it for FF? the ultrawide lenses like the 10-20 or the 8-16mm are great but they are not ART. If sigma make a high quality wa Art lens for Aps-c would be wonderful.... this one is great but starts at 12mm.

500mm still too short for a moonshot. Trust me, I have a 1000mm "Mirror lens" and it's still too short for that.

Link | Posted on Sep 19, 2016 at 20:12 UTC
In reply to:

getoutandshoot: I'm disappointed to see that protruding bulbous front element on the 12-24mm, so yet another wide angle lens that doesn't easily take filters...

Dave

The idea would have been perhaps to put a filter in the middle of the lens, like it is on my older Nikon 300mm f/4.5

Link | Posted on Sep 19, 2016 at 20:10 UTC
On article 6 tips for shooting fall color (80 comments in total)
In reply to:

Dirk Nuary: Tips number 8. Use raw format then increase vibrance and saturation.

Tip number 9: use HDR photography. For example use Photomatix pro and use the "natural" rendition so it will not look overdone.

Link | Posted on Sep 6, 2016 at 09:53 UTC
In reply to:

CameraLabTester: This is seriously a serial problem.

Panasonic must catch this serial killer...

.

Ay, there's the rub

Link | Posted on Jul 9, 2015 at 09:09 UTC
On article Nikon offers AF-S DX Nikkor 16-80mm F2.8-4E ED VR (334 comments in total)

Seriously, I doubt it has a fluorine coating, given fluorine is a gas.
Nitpicking.

Link | Posted on Jul 2, 2015 at 13:06 UTC as 55th comment | 4 replies
In reply to:

ThatCamFan: Or just use a polorizer, mit is wasting time.

Actually It's not 45 degrees as I said, but Brewster's angle. Read the wikipedia article.
Sorry to Virvatulet, I didnt see your post.

Link | Posted on May 15, 2015 at 08:25 UTC
In reply to:

Mal69: I just use a multi coated B+W polarizing filter, when turned the right way it eliminates those reflections, alternatively if the picture is very important i use my superpowers to levitate outside the window while i take the shot.

I think this will be good for all those camera phones of which there are tens of millions around the world.

Wrong, totally wrong.
You should read the article on Brewster's angle in the Wikipedia.

Link | Posted on May 15, 2015 at 08:23 UTC
In reply to:

ThatCamFan: Or just use a polorizer, mit is wasting time.

Light reflected from glass is mostly polarised when it is reflected at 45 degrees,
but if it's from a window straight in front of you a polariser has very little effect,because the reflected light is barely polarised in this circumstance.
Why dont you just try and pull out a polariser and try it right now?

Link | Posted on May 14, 2015 at 12:59 UTC
In reply to:

Great Bustard: Oh yeah? Well, uh, Nikon has oil spots on their sensor. And you know what? They had oil on their sensor long before Canon had these dots. So, well, like, there. Take that! : )

The Canon 5D had oil spots on their sensors long before Nikon.

Link | Posted on May 2, 2015 at 11:00 UTC
In reply to:

LWW: I think Canon should sack all of their techs and recruit from here!

You would make a horrible boss.

Link | Posted on May 1, 2015 at 14:34 UTC
In reply to:

digiart: Very informative article. It explains very well what we know from experience. Thank you!

P.S.
It would be excellent if in the reviews DPR tested each camera to find out what is the ISO setting that gives you the best dynamic range.

The best dynamic range is generally the lowest ISO (but not quite always, sometimes it's the second lowest).

Link | Posted on Apr 27, 2015 at 17:52 UTC
On article Hands-on with the Pentax K-3 II (534 comments in total)
In reply to:

yesman12: When I see innovation like this, it confirms the reason I went with In Body Image Stabilization... Much more innovative and extensible than In Lens. And all the noise around In Lens being better is probably a wash at this point. In lens is a hold over from film era. Look what In Body can give you....

- Image stabilization on all lenses.
- Tilt shift function on all lenses up to a few degrees.
- Astrotracer in body equatorial mount (and I have used it)
- Macro adjustment
- Configurable aniti- Alias filtering
- And now increased resolution (I am sure off tripod will follow).

Where as In Lens only provides IS on a given lens. That is it.

I am most surprised by your statement that there is a tilt shift function. As far as I know there is shift but no tilt.

Link | Posted on Apr 24, 2015 at 12:40 UTC
On article Olympus OM-D E-M5 II Review (869 comments in total)

The hi-res mode is definitely sharper than the D810 if you look at the etchings.
And less moire.
Didnt Hasselblad have a similar mechanism where it moved the sensor and combined the images?
I would love to see other manufacturers offer this feature.

Link | Posted on Mar 25, 2015 at 19:37 UTC as 79th comment | 5 replies
On article A closer look at the Nikon Coolpix P900 megazoom (194 comments in total)
In reply to:

Wye Photography: It will be very interesting looking at sample pix from all over the zoom range especially at the long end. Will I laugh or cry or both!

An ideal camera for pedos, it's bound to sell well!

The first thing that came to mind was taking pics of small birds.
I'd like to see how the moon comes out with this lens.

Link | Posted on Mar 2, 2015 at 12:38 UTC
On article A closer look at the Nikon Coolpix P900 megazoom (194 comments in total)
In reply to:

ProfHankD: This is one of the few ways in which small sensors can still win. The camera's lens is huge... until you compare it to other lenses approaching 2000mm f/6.3. My closest FF lens is a 1250mm f/11 mirror lens; it could swallow about 4 of this camera, and it produces bokeh full of doughnuts. On the other hand, the sensor here is around 5.6X crop factor, which means the lens focal length range is really about 4-350mm... which explains why it is so much smaller than my mirror lens. Of course, that is still an awesome optical achievement: a typical 70-200mm f/4 FF lens is bigger than this lens. The price is also impressively low.

In sum, this seems like one heck of a versatile camera for the price. On a pan/tilt mount, this could be an amazing security camera. It probably is fixing a multitude of optical sins in firmware, with IQ suffering somewhat, but it's still darn impressive.

What brand mirror lens has a focal length of 1250?
Just curious.

Link | Posted on Mar 2, 2015 at 12:36 UTC
In reply to:

tkbslc: atmospheric distortion + haze + diffraction + camera shake = FANTASTIC PHOTOS!!!

Yes, I noticed haze and diffraction with my Nikon 1000mm mirror lens.
But at reasonably close distances this is less of a problem.
As for camera shake, I wonder if a tripod will be a necessity.

Link | Posted on Mar 2, 2015 at 09:31 UTC
In reply to:

Simple man: Inspired photos with flair......

Gotta love Nikon Marketing.

Better than inspired photos with flare.

Link | Posted on Jan 6, 2015 at 11:17 UTC

Hopefully this could be implemented with any camera that has a sensor cleaner that uses shake, providing the control of the movement can be made fine enough.
It's only of interest for the photography of static objects.

Link | Posted on Dec 7, 2014 at 20:51 UTC as 18th comment

I actually thought of this a year ago, but then I wondered if the curvature would not need to change according to the lens. So it might work very well in a compact camera with a fixed focal length lens. In any case technology always involves tradeoffs.
Maybe Ricoh's idea of changing the sensor with the lens would be the rihgt thing here.
I hope they cant patent the very idea of a curved sensor.

Link | Posted on Jun 18, 2014 at 08:51 UTC as 100th comment | 2 replies
On article Lensbaby releases 5.8mm F3.5 circular fisheye lens (20 comments in total)

Wait until you see the tests. This might have lots of chromatic abberration.

Link | Posted on Apr 12, 2014 at 12:57 UTC as 8th comment
Total: 38, showing: 1 – 20
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