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: 203, showing: 1 – 20
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Hard, but B seems better to my eyes.

Link | Posted on Aug 23, 2017 at 02:44 UTC as 188th comment | 2 replies
On article Canon EF 35mm F2 IS USM gallery (151 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 22nd 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 24th 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
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