Ruy Penalva

Ruy Penalva

Lives in Brazil Lauro de Freitas Bahia, Brazil
Works as a Medical Doctor
Joined on Jun 28, 2010
About me:

Ruy Penalva de Faria Neto

Comments

Total: 131, showing: 1 – 20
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On Manfrotto launches miniature Lumie LED lights article (46 comments in total)

Forget. Only for too close.

Direct link | Posted on Mar 27, 2015 at 02:23 UTC as 11th comment
On 10_SAM_11.0 mm_f4.0_026 photo in dpreview review samples's photo gallery (9 comments in total)
In reply to:

matthew saville: How is THIS an acceptable sample photo? It's completely out of focus! Are there any other 11mm f/4 shots that actually have useful corner sharpness sampling?

Out of focus???

Direct link | Posted on Mar 19, 2015 at 17:11 UTC
In reply to:

Ruy Penalva: Forget both. Think on Canon 11-24 the Beast. But the price matter.

So do you think Canon went to 11mm wide without no need?!!! See its MTF done by Roger Cicala and change your concept. Soon Sigma will be there too. That lens quality aims at 50 MP sensor.

http://www.lensrentals.com/blog/2015/02/canon-11-24-f4-l-mtf-tests

Direct link | Posted on Mar 6, 2015 at 22:36 UTC
In reply to:

Ruy Penalva: Forget both. Think on Canon 11-24 the Beast. But the price matter.

To Panorama f/2.8 is not important. F/4 suffices indoor in wide angle in most situations.

Direct link | Posted on Mar 6, 2015 at 15:11 UTC

Forget both. Think on Canon 11-24 the Beast. But the price matter.

Direct link | Posted on Mar 6, 2015 at 03:22 UTC as 71st comment | 5 replies
On Panasonic Lumix DMC-GH4 Review preview (484 comments in total)

I think, besides the poor lens inventory, it is not a camera for serious still shooters.

Direct link | Posted on Oct 17, 2014 at 01:45 UTC as 68th comment | 14 replies
On 'See Impossible': Canon counts down to... something. article (1656 comments in total)

I'm hoping for the impossible. Canon promised. Canon should make it possible.

Direct link | Posted on Oct 7, 2014 at 16:28 UTC as 394th comment
On Panasonic Lumix DMC-LX100 First Impressions Review preview (1864 comments in total)
In reply to:

Ruy Penalva: You say that the sensor in Lumix DMC-LX100 is 1.5X bigger than an 1" sensor but when compared to PowerShot G1 X II that has a 1.5" sensor it has a smaller area than it (180mm² X 239mm²). An 1.5X 1" sensor is not a 1.5" sensor? Explain me that. What measure you take into account to calculate both sensor areas in the way one is smaller than the other although they are of the same 1.5"?

This kind of disorder is becoming very frequent in modern days. I just think it is a functional disorder of neuron maturation. I don't know why that confusing terminology. I wonder they found a spectra of ADHD that goes from Hyperactive to Inactive within the same disorder. I need to read the subject to understand better. By the way, I think this is a clinical diagnosis of a spectra of minor disorders of brain function.

The case above I quoted is by comparing to an upper normal heart rate limit they call the ventricular tachycardia as being non tachycardic. An upper normal sinus heart rate is around 100bpm. When one takes into account a normal ventricular rate, around 40bpm, anything above that "normal" rate for a ventricle rate is considered tachycardia although it is not a true tachycardia when compared to a normal upper rate from a normal sinus rate, 100bpm. To a ventricle rhythm (rate) anything above 40bpm is considered tachycardia, although it is not a true tachycardia.

Direct link | Posted on Sep 30, 2014 at 17:21 UTC
On Panasonic Lumix DMC-LX100 First Impressions Review preview (1864 comments in total)
In reply to:

Ruy Penalva: You say that the sensor in Lumix DMC-LX100 is 1.5X bigger than an 1" sensor but when compared to PowerShot G1 X II that has a 1.5" sensor it has a smaller area than it (180mm² X 239mm²). An 1.5X 1" sensor is not a 1.5" sensor? Explain me that. What measure you take into account to calculate both sensor areas in the way one is smaller than the other although they are of the same 1.5"?

That confusion is great. I remember a medical condition in american medical literature called Non tachycardic tachycardia

Direct link | Posted on Sep 29, 2014 at 15:29 UTC
On Panasonic Lumix DMC-LX100 First Impressions Review preview (1864 comments in total)
In reply to:

Ruy Penalva: You say that the sensor in Lumix DMC-LX100 is 1.5X bigger than an 1" sensor but when compared to PowerShot G1 X II that has a 1.5" sensor it has a smaller area than it (180mm² X 239mm²). An 1.5X 1" sensor is not a 1.5" sensor? Explain me that. What measure you take into account to calculate both sensor areas in the way one is smaller than the other although they are of the same 1.5"?

And why a 1.5" sensor has 239mm² area? An 1.5" should not be a 1.5X 1" sensor?

Direct link | Posted on Sep 25, 2014 at 04:05 UTC
On Panasonic Lumix DMC-LX100 First Impressions Review preview (1864 comments in total)

You say that the sensor in Lumix DMC-LX100 is 1.5X bigger than an 1" sensor but when compared to PowerShot G1 X II that has a 1.5" sensor it has a smaller area than it (180mm² X 239mm²). An 1.5X 1" sensor is not a 1.5" sensor? Explain me that. What measure you take into account to calculate both sensor areas in the way one is smaller than the other although they are of the same 1.5"?

Direct link | Posted on Sep 24, 2014 at 22:31 UTC as 150th comment | 6 replies

May be this new model can focus better than the old one. I had the old one and almost all of my shot (telephotos) were under-focused when 100% amplified.

Direct link | Posted on Sep 22, 2014 at 21:52 UTC as 111th comment | 2 replies
On Canon EOS 7D Mark II First Impressions Review preview (2696 comments in total)
In reply to:

Ruy Penalva: I think Canon did not the more important job: a FF and better sensor. So, apart from some minor and utile real improvements, 7D MKII is born with valid time expired.

Hi friend, I have both Canon you quoted, besides 70D, Lumix GH4, Sony a7s! I had 7D and I hated it. When you compare any Canon FF lens in a cropped Canon sensor versus a FF sensor there are big differences in performance.

Direct link | Posted on Sep 15, 2014 at 15:36 UTC
On Canon EOS 7D Mark II First Impressions Review preview (2696 comments in total)

I think Canon did not the more important job: a FF and better sensor. So, apart from some minor and utile real improvements, 7D MKII is born with valid time expired.

Direct link | Posted on Sep 15, 2014 at 15:09 UTC as 535th comment | 3 replies
On Sony unveils FE PZ 28-135mm F4 G OSS cinema lens article (119 comments in total)

Astonishing 95mm frontal filter thread!!! Hood like a camcorder hood. A complete lens.

Direct link | Posted on Sep 13, 2014 at 00:48 UTC as 11th comment
On Sony unveils FE PZ 28-135mm F4 G OSS cinema lens article (119 comments in total)

That is a lens. Has the best of the World, and has AF and IS, besides having focus, zoom and aperture ring, Congratulations Sony! I forgot: Powered zoom.

Direct link | Posted on Sep 12, 2014 at 22:40 UTC as 12th comment
On Zeiss introduces 'no distortion' Otus 1.4/85mm article (338 comments in total)

85mm lens, even so fast, without stabilization, is a invite to hand photo blur.

Direct link | Posted on Sep 9, 2014 at 01:13 UTC as 106th comment | 4 replies
On Zeiss launches Loxia full frame lenses for Sony E-mount article (268 comments in total)
In reply to:

Ruy Penalva: I don't understand why Zeiss insist on doing MF lens. Wake up Zeiss!

I prefer to have all options available in my camera lenses. But if they were made to use follow focus and aimed at the cinema (very small public) user, I understand.

Direct link | Posted on Sep 4, 2014 at 01:00 UTC
On Zeiss launches Loxia full frame lenses for Sony E-mount article (268 comments in total)
In reply to:

Ruy Penalva: I don't understand why Zeiss insist on doing MF lens. Wake up Zeiss!

All Canon top cinema lens have AF. It is easier and cheap to make MF lens than AF one. See Samyang.

Direct link | Posted on Sep 3, 2014 at 22:31 UTC
On Canon confirms price drop on select EF lenses article (140 comments in total)

Deceive me! I like it.

Direct link | Posted on Sep 3, 2014 at 19:14 UTC as 7th comment
Total: 131, showing: 1 – 20
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