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


Total: 202, showing: 1 – 20
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On article Canon EF 35mm F2 IS USM gallery (132 comments in total)

I think that image samples is not the best approach to evaluate a lens. The great advantages of this one is stabilization and price, although it could be cheaper.

Link | Posted on Aug 17, 2017 at 03:11 UTC as 19th comment

I always found Corel very non intuitive and hard to master. Complicated the old interfaces.

Link | Posted on Aug 9, 2017 at 18:30 UTC as 23rd comment | 2 replies
In reply to:

Leonp: Do Photoshop an LR tutorials necessarily involve very strange voices?
(This one, Dr. Brown, Julieanne Kost, Benjamin Warde ....)

A photoshopped voice!

Link | Posted on Jul 25, 2017 at 19:43 UTC
In reply to:

mosc: Canon 300mm f2.8 on that list?

Officially not.

Link | Posted on Jul 23, 2017 at 03:55 UTC
On article Astrophotography with the Sigma 14mm F1.8 Art lens (79 comments in total)

I praise it be good for astrophotography at f/1.8 because in Ciccala tests it not show outstanding MTF performance as compared with its peers.

Link | Posted on Jul 18, 2017 at 18:23 UTC as 14th comment

Poor consumer!

Link | Posted on Jun 27, 2017 at 19:40 UTC as 63rd comment

Poor stabilization.

Link | Posted on Jun 23, 2017 at 17:41 UTC as 51st comment

Sigma learned the way to increase its lens price. But in South America the price use to be very much lower than that of USA.

Link | Posted on Jun 22, 2017 at 21:41 UTC as 31st comment | 1 reply

Are you afraid of?

Link | Posted on May 23, 2017 at 18:12 UTC as 84th comment
In reply to:

Carl: The Sony 12-24/4 is produced in China, while the equivalent Sigma is produced in Japan. Doesn't this mean lower production costs for Sony? Why does this not reflect in a lower customer price?

Or, by the way, reply!

Link | Posted on May 17, 2017 at 21:28 UTC

I had one. It fell down in a stream and survived intact. I keep it unused for almost 2 years in the drawing and when I turned it on it was perfect. A breakthrough in the CMOS sensor.

Link | Posted on Apr 6, 2017 at 19:16 UTC as 44th comment

The question is: why Canon could not do the same?

Link | Posted on Apr 4, 2017 at 18:38 UTC as 10th comment | 1 reply
On article Image style AI can convert paintings to photographs (54 comments in total)

Supposedly only when the painter has a photographic stile.

Link | Posted on Apr 4, 2017 at 02:05 UTC as 12th comment
On article We try out the new HassleVlad (100 comments in total)

Welcome Volodia.

Link | Posted on Apr 2, 2017 at 01:51 UTC as 18th comment

These seem to be made of anodized aluminum alloy. The same color as some cheap Chinese lantern.

Link | Posted on Mar 22, 2017 at 18:32 UTC as 5th comment | 1 reply

But is it about subject tracking or about Nikon subject tracking?

Link | Posted on Mar 20, 2017 at 03:27 UTC as 32nd comment

Is here a criminal page?

Link | Posted on Mar 16, 2017 at 02:38 UTC as 18th comment | 2 replies

Sony made the "simply" complex without outstand optical gain.

Link | Posted on Mar 4, 2017 at 16:14 UTC as 21st comment

Variation on the same theme. Tablet is tablet notebook is notebook. Hen is not a duck.

Link | Posted on Feb 27, 2017 at 03:11 UTC as 27th comment | 1 reply
On article Sense and Sensitivity (6 comments in total)

That was a good manner to not explain clearly what ISO means. Better, and simply, would be to say that ISO is the boost the software gives on the sensor to fit adequately aperture and shutter speed chosen in such a way as to result in an usable shot.

Link | Posted on Feb 20, 2017 at 03:04 UTC as 2nd comment | 3 replies
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