Frank_BR

Lives in Brazil Campinas/SP, Brazil
Works as a Engineer
Joined on Jan 20, 2005

Comments

Total: 446, showing: 1 – 20
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In reply to:

AksCT: Apple has announced the next generation of its smart phone, iPhone7M. This phone will not include any screen and will enable users to enjoy the phone at it is was originally intended to be. "With the exclusion of the ubiquitous LCD screen users must return to the principles of telephony. Exclusion of screen prevents chimping and other activities, which has nothing to do with the phone", said Apple's Head of Desperative Innovation.
Phone will include standard physical push buttons and only one ring tone. Users can choose any color they want to, as long as it is black.

You forgot to say the iPhone7M will go on sale in May with a price of $5995/£4650 :-)

Link | Posted on Apr 30, 2016 at 17:37 UTC

Let's be fair with Leica. The absurdity is not to sell a camera without LCD. The absurdity is to buy a camera without LCD.

Link | Posted on Apr 29, 2016 at 12:20 UTC as 136th comment | 4 replies

Another great article by Roger Cicala. The use of a linear motor for focusing a lens is conceptually logical. The challenge in practice is how to ensure that the focusing element moves but always remains exactly perpendicular to the lens axis. A fraction of a degree tilt is enough to cause decentering, so the longitudinal guides must be machined with very high precision. The use of just one linear motor is economical but creates an asymmetrical traction: there will always be the risk of a catastrophic locking of the focusing system if the clearances in the guides are too small, or tilting of the focusing element if the clearances are too large. The least worst solution is to use large clearances in the guides, but this ends up generating undesirable optical decentering. The use of two or more linear motors enables a much more symmetrical traction, even reducing the need for lubricant on the guides.

About the glue failure… well, that was work of amateurs!

Link | Posted on Apr 21, 2016 at 23:35 UTC as 6th comment
On article Student takes 2016 Zeiss Photography Award top prize (223 comments in total)

The winning photo has a lot of noise, chromatic aberration and poor definition. The opposite of what is expected from a picture taken with a Zeiss lens...

Definitely, you do not need a Zeiss lens to win a Zeiss Photography Award top prize. Now, the student will receive Zeiss lenses worth €15,000 and may never win another Zeiss prize. Who knows?

Link | Posted on Apr 13, 2016 at 02:08 UTC as 49th comment | 3 replies
On article Hands on with the Hasselblad H6D 50c/100c (268 comments in total)

"The top shutter speed for the new body is 1/1000 sec, but with the new HC lens range that decreases to 1/2000 sec..." (DPR)
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When you go from 1/1000 sec to 1/2000 sec, the exposure time decreases but the shutter speed increases!

Link | Posted on Apr 12, 2016 at 13:34 UTC as 72nd comment | 3 replies
In reply to:

Frank_BR: Sorry, but the test seems flawed. I had the impression that D5 does not filter the RAW image, while other cameras provide a semi-cooked RAW with some filtering of noise. Under these conditions, it is expected that the RAW image from the D5 seems noisier than the other cameras.

> -complains about cooked RAWs
> -suggests repeating test with JPEGs

> O.O
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Too complicated for simple minds, LOL.
JPG x JPEG would be a fairer comparison than RAWp x RAWf

Note:
RAWp = pure RAW
RAWf = filtered RAW

Link | Posted on Mar 29, 2016 at 11:11 UTC
In reply to:

Frank_BR: Sorry, but the test seems flawed. I had the impression that D5 does not filter the RAW image, while other cameras provide a semi-cooked RAW with some filtering of noise. Under these conditions, it is expected that the RAW image from the D5 seems noisier than the other cameras.

Well, if you process the D5 image with Neat Image, you will see that the noise intensity can be reduced practically to the level of the D750, but with negligible loss of definition. I have the impression that the D750 RAW is cooked, but the D5 RAW is not. I feel that the DPR test was poorly conducted. My suggestion is that they repeat the test with JPEG images.

Link | Posted on Mar 29, 2016 at 00:23 UTC
In reply to:

Frank_BR: Sorry, but the test seems flawed. I had the impression that D5 does not filter the RAW image, while other cameras provide a semi-cooked RAW with some filtering of noise. Under these conditions, it is expected that the RAW image from the D5 seems noisier than the other cameras.

> This is the same excuse canon fanboys have been using for years.
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Canon fanboys? I don't know what you're talking about. I compared the Nikon D5 with the Nikon D750. I'm interested in cameras, not fanboys war.

Link | Posted on Mar 28, 2016 at 23:51 UTC

Sorry, but the test seems flawed. I had the impression that D5 does not filter the RAW image, while other cameras provide a semi-cooked RAW with some filtering of noise. Under these conditions, it is expected that the RAW image from the D5 seems noisier than the other cameras.

Link | Posted on Mar 28, 2016 at 23:06 UTC as 167th comment | 9 replies

The news is that Dracula, the Prince of Darkness, is having a great time with his Nikon D5. But he thinks that all sensitivities below ISO1,000,000 are useless for his purposes.

Link | Posted on Mar 28, 2016 at 18:52 UTC as 63rd comment
On article Leica Q In-depth Review (1113 comments in total)

I wonder what is the market for a fixed-lens P&S camera that costs more than $4,000. I can imagine three types of buyers:
1) bored owners of Leica cameras and M-lenses, who already have everything and want to try a new photographic toy.
2) owners of cumbersome DSLR cameras with multiple lenses, who are tired of carrying weight and want more freedom of movement.
3) very-well-paid young professionals, who are tired of the limitations of smartphone cameras and want a "real" camera.

What all those people have in common is a certain frustration with photography. Sadly, the joy with the new acquisition will wear out in a few months. Soon they will discover that they just bought a fixed focal length 28mm lens that came with a built-in sensor and display. Then it will be time to look for a new expensive toy…

Link | Posted on Mar 24, 2016 at 17:28 UTC as 79th comment

"Our testing shows that Canon's EOS 80D features a sensor with greatly improved Raw dynamic range." (DPR)
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Well, DR increased by about 1EV, i.e. the 80D pushed 5EV virtually matches the 70D pushed 4EV. In short, there is a non-negligible increase in DR, but the improvement is not spectacular.

Link | Posted on Mar 22, 2016 at 02:12 UTC as 131st comment | 5 replies
On article How to: iFixit disassembles the Fujifilm X100T (109 comments in total)

"Beauty is only skin deep", or What a messy inside!!

Link | Posted on Mar 21, 2016 at 17:03 UTC as 5th comment

The camera-lens balance seems perfect. I don't believe this lens is front heavy, do you?

Link | Posted on Mar 20, 2016 at 15:56 UTC as 4th comment
On article Canon announces budget-friendly EOS Rebel T6 (1300D) (931 comments in total)

I do not understand why this camera is called "Rebel". Is it a kind of disguise? Like a sheep in wolf's clothing?

Link | Posted on Mar 10, 2016 at 23:41 UTC as 84th comment | 2 replies

Have you been upset lately because your camera has taken a lot of overexposed photos? Super Stopper came to end your problems.

As a bonus, with Super Stopper you'll be able to shoot sunspots, solar flares, arc welding, high-intensity lasers, nuclear explosions and many other exciting scientific, industrial and military subjects.

Link | Posted on Mar 7, 2016 at 16:08 UTC as 7th comment | 2 replies

If you want to experience strong emotions, play Russian roulette first and then buy a Nikon camera. Emotions will go on a crescendo, but you can reverse the order if you want.

Link | Posted on Mar 2, 2016 at 12:09 UTC as 40th comment
On article CP+ 2016: Things we found that had been cut in half (136 comments in total)

After witnessing all this perversity, I think it's time to create the SPCCL, Society for the Prevention of Cruelty to Cameras and Lenses, similar to the SPCA.

Link | Posted on Feb 29, 2016 at 14:43 UTC as 27th comment
On article CP+ 2016: Things we found that had been cut in half (136 comments in total)
In reply to:

GRUBERND: how do they do it? most likely a waterjet cutter.

if you dont mind seeing a Canon 500 being halfed:
https://www.youtube.com/watch?v=jruSfx3ztjw

Cool! Thanks for sharing. But if you should use waterjet cutter only on weather-sealed cameras and lenses! Otherwise you lose the manufacturer's warranty...

Link | Posted on Feb 29, 2016 at 14:18 UTC
On article Opinion: Enthusiast compacts have finally come of age (494 comments in total)

"Being somewhat knowledgeable in the digital camera field..." J.K.
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Somewhat knowledgeable? What is left for us other poor mortals?

Link | Posted on Feb 28, 2016 at 17:06 UTC as 105th comment
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