rhlpetrus

rhlpetrus

Lives in Brazil Campinas, Brazil
Works as a math professor
Joined on May 4, 2007

Comments

Total: 591, showing: 1 – 20
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On Panasonic Lumix DMC-LX100 Review preview (826 comments in total)

Looks excellent overall, plan is to get the Leica version. Thanks for good review. Repositioning AF point is mostly an issue when using a tripod, for most other uses, focus and reframe is much quicker.

Direct link | Posted on Nov 18, 2014 at 21:47 UTC as 179th comment | 1 reply
On A second glance: two takes on the Leica X article (386 comments in total)
In reply to:

ekaton: I`m not trying to defend the X113. But the professional`s "review" is rather a piece of snobbery than a real camera review. If he can`t get a decent file with a state of the art 16MP aps-c sensor than it might be not the tool`s shortcomings. This 16MP Sony sensor is as good as FF sensors were a few years back. Good enough, for sure for many pro uses. "Inadequate DNG files....". Really?

Not true, there are very evident differences between sensors/adc systems, and some are clearly better than others. Pushing shadows is something that shows limitations of some very expensive pro-level sysyems, and this Leica just seems handicapped in that regard.

Direct link | Posted on Nov 8, 2014 at 00:26 UTC
On Panasonic Lumix DMC-LX100 First Impressions Review preview (1864 comments in total)
In reply to:

Mike Ronesia: How is the macro mode on this camera? It could be perfect for an underwater housing.

0.089 ft is 2.7cm

Direct link | Posted on Oct 29, 2014 at 23:29 UTC
On Canon EOS 7D Mark II First Impressions Review preview (2702 comments in total)
In reply to:

Yiannis A - Greece: Dear friends, spending the last 75 minutes reading all comments on this page, i have to say that, most opinions remind me of a hypothetical scenario that Monica Bellucci (not a fan of her but most men are) offers you her entity for one night and Roseanne Barr hers (nothing personal dear Rosie) for a fraction of the price. Finally, short of cash/self-confidence/mentality, you decide to try your luck with the "not so obvious choice". You'll never admit that you did it due to the aforementioned reasons, instead you'll go on shouting "Dear Lord, what was it i was about to pay almost a fortune for? A woman with a left ear 1/10th of a millimeter smaller than her right one! Thank you my Lord for leading me towards the symmetrical perfection of Roseannes' ears! I'm so so happy, i chose her!" With what i say here, i don't want to insult certain stars/fans/people but to give an example of what kind of excuses people use in order to persuade others for their own opinions, biases and obsessions.

You have a lot of time to spend ...

Direct link | Posted on Oct 24, 2014 at 18:46 UTC
On Canon EOS 7D Mark II First Impressions Review preview (2702 comments in total)
In reply to:

PhotoKhan: When we initially access the comparison it is set up to show Jpeg samples of the 7DII on the top left pane, the 7D on the top right, the Nikon 7100 on the lower left and the Sony a6000 on the lower right pane.

When we switch to RAW, no mater in what particular area of the scene you click the sampler over it is extremely clear that the Sony is far superior to the other 3.

The issue with A6000 in Raw is color, check hair, it shows a greenish cast, color card shows signs of color shifts in any part that has strong reds. Detail is excellent, D7100 is next, D7100 looks better re colors. The Canons suffer in detail, and colors are a bit too saturated, but that's likely due to ACR's profiles.

Direct link | Posted on Oct 24, 2014 at 18:44 UTC
In reply to:

falconeyes: Still largely useless tool. Ok for noise and corner performance. Nothing else.
E.g., uses F5.6 70mm eq. for RX100m3 and F4 50mm eq. fir LX100. Can't be compared. E.g., F5.6 is F15.4 eq. and deep into softness by diffraction territory.

Rishi, how did you convert LX100's files? Is ACR updated for it? I thought not.

LX100 looks like a winner. Some have complained about lens wide open, in the longer review, please check that, since one of its most interesting features is the fast zoom.

Direct link | Posted on Oct 15, 2014 at 14:00 UTC
In reply to:

Eric Calabros: Forget these compacts, look at that almighty D750
downscaled to print size, competes with A7S!

I'm getting both, the D750 and the Leica D-Lux 109 (=LX100)

:-)

Direct link | Posted on Oct 15, 2014 at 13:57 UTC
In reply to:

intruder61: Too many guys believe the BS hype the manufacturers are throwing at you about how good these compacts are, then when they don't perform to what you want it to, out come the guns....compacts are compacts are compacts, small sensors, nothing special, it is what it is....and here is the special, you get shafted by paying premium price....entry level DSLRs with APSC sensors for less $$ are a whole lot better value...oh yeah i forgot, the DSLRs dont fit in your back pocket while you're having coffee down at the cafe.

I am getting the V-Lux (same as LX100), to go along with the dlsr system, which I can keep at a higher level (FF, for example), for more difficult or more requiring shooting situations. A compact this size is very handy, when you don't need all the capability of a dslr. Compare the LX100 size and bulk to even a small dslr or ml, when lenses are included (and kit zooms tend to be very slow, if you want a faster zoom, size, weight and price climb very fast).

Direct link | Posted on Oct 15, 2014 at 13:56 UTC
In reply to:

Artpt: @Rishi Sanyal:

Way to respond... to a lot 'passionate' questions (I am thinking of Rodney Dangerfield in Back To School..."He really seems to care. About what, I have no idea")

Anyway, does noise relate to color channel...or are they all independent and more a characteristic of each sensor?

As always, thank you!

Color channel noise depends heavily on light source. Incandescent lighting, for example, has very weak B channel, which will cause WB correction to bring up a lot of noise in that channel. That's why we see two cameras having pretty similar noise when the light source has balanced colors, but one of them suffering of much more noise when channels are unbalanced, in low light situations.

Direct link | Posted on Oct 15, 2014 at 13:52 UTC

Very nice performance from LX100, I'll be getting the Leica version, likely same. How did you convert its RAW files? I have checked the latest ACR update and the LX100 is not included. Am I missing something?

Direct link | Posted on Oct 15, 2014 at 13:48 UTC as 33rd comment | 1 reply
On Nikon D750 real-world samples gallery posted article (348 comments in total)
In reply to:

km25: The basic images look fine to me, in some I can see that depth you can get from high MP cameras. The thing I do not see sharpness of lens, like an hard detail of a old face with the unshaven look, you see very line. These image just to soft to me.

Good job Rishi!

Direct link | Posted on Oct 9, 2014 at 10:27 UTC
On Nikon D750 real-world samples gallery posted article (348 comments in total)
In reply to:

Hugo808: It's got to the point where I can't tell the difference between cameras at all. If you told me these were taken with a 1" compact I would just nod and turn the page.

That they are full frame shots makes me impressed that the field has been levelled so much. But not that I'd be better off spending a lot on a new camera, not for reasons of IQ anyway....

You need to try them side-by-side, there is a difference. But a D90 is a nice camera, I got many very good images from a D80 ...

Direct link | Posted on Oct 9, 2014 at 10:26 UTC
On Nikon D750 real-world samples gallery posted article (348 comments in total)

Indeed, finally some decent samples ;-)

The camera looks pretty good at this point, and seems to be a huge success among DPR users that have adopted it.

Direct link | Posted on Oct 9, 2014 at 10:25 UTC as 52nd comment
On D750-DSC_1015-ISO_100.acr photo in dpreview review samples's photo gallery (2 comments in total)

Very good shot.

Direct link | Posted on Oct 9, 2014 at 09:33 UTC as 2nd comment
On 'See Impossible': Canon counts down to... something. article (1659 comments in total)

Canon sells its imaging division to ... ?

Direct link | Posted on Oct 6, 2014 at 12:01 UTC as 780th comment
On 25_ISO1600_P1000151 photo in dpreview review samples's photo gallery (12 comments in total)

Excellent!

Direct link | Posted on Oct 5, 2014 at 01:47 UTC as 6th comment
On 03_ISO200_P1000155 photo in dpreview review samples's photo gallery (6 comments in total)

Nice, thanks.

Direct link | Posted on Oct 5, 2014 at 01:45 UTC as 1st comment
In reply to:

Realll: I would ask you WHY to buy camera with limited zoom and so small image size (only 12 mp)? The size of the camera is almost same as my Sony a5000 with 16-50, but Sony has big APS-C sensor and 20 mp images... Yes, I know- the glass is important. But amouont of light is approximately equal. So with Sony and 16-50I have same size, same zoom, almost twice bigger images for beautiful crops and I have it on half-price of the LX100... So again WHY ?

Which size do you print? Is APS-C really that big? How fast is the 16-50mm? How large?

Direct link | Posted on Oct 1, 2014 at 17:13 UTC
In reply to:

majicmoments: I have handled the Lx100 and the 24mm end @1.7 is sublime.. with a dreamy shallow DOF.. it is such a quality camera that covers my most used focal lengths.. but like Damien, i am astonished that Panny have left out their tried & tested beautifull touchscreens.. and in this day'n age no tiltscreen.. which is a godsend for street/landscape & family photography.. Thank you Damien for such an interesting article.. more of the same please!

Except for AF, the touch screen is really not needed, with all these dials and buttons to work with.

Tilting LCD is a distraction, I prefer my camera smaller and w/o weak points (mechanically).

Direct link | Posted on Oct 1, 2014 at 17:12 UTC

Lens, pure and simple, there's no m43 lens at size and price that competes with it. For those like me that already have an IL sistem, and are not interested in developing yet another one, the Panny/Leica compact is the best option.

Direct link | Posted on Oct 1, 2014 at 16:09 UTC as 191st comment | 4 replies
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