trungthu

Lives in Viet Nam Viet Nam
Joined on Jan 28, 2007

Comments

Total: 60, showing: 1 – 20
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I think, in normal users, no problems with this phenomenon.
The information is very useful for anyone want to saying in coffee spaces...

Link | Posted on Jul 6, 2017 at 01:39 UTC as 3rd comment
On article CP+ 2017: Hands-on with new Voigtländer E-mount primes (117 comments in total)

While we pay money for performances, I don't know why the manufacturer doesn't have questions about that. Or he cannot do that...
I will use manual focus if I want, but I also want to have accurate AF function in the lens...
The film makers usually use manual focus but they won't use this lens.
The quality is only one of other functions that the users need.

Link | Posted on Apr 23, 2017 at 01:43 UTC as 1st comment
In reply to:

Nukunukoo: Dear Cambo, can you also do the same for X-Mount? Much appreciated! =)

Not the quality, but the price.

Link | Posted on Mar 25, 2017 at 14:12 UTC
On article Olympus working on 8K video for Micro Four Thirds (219 comments in total)
In reply to:

trungthu: If the dimension of the Olympus's sensor is 18 X 13,5 mm. And when they make a sensor for 8K, that means 18 mm / 8000 px = 2.25 um per pixel.
And I think with that pixel dimension, Olympus can not say anything about the detail or the dynamic range of the picture or motion picture.
The lens can not "see" that so tiny pixel... or they must use software to reproduction the detail. Not the real detail from the sensor.

I don't know you want to say about the "number" of pixels in a sensor or the "quality" of the picture using that tiny pixel pitch,,,
Someone has said about the quality of the Nokia (41Mp), maybe 7 pixels equal one pixel in a normal DSLR... (when saying about the quality of lens plus lens's resolution...)

Link | Posted on Mar 15, 2017 at 05:21 UTC
On article Olympus working on 8K video for Micro Four Thirds (219 comments in total)

If the dimension of the Olympus's sensor is 18 X 13,5 mm. And when they make a sensor for 8K, that means 18 mm / 8000 px = 2.25 um per pixel.
And I think with that pixel dimension, Olympus can not say anything about the detail or the dynamic range of the picture or motion picture.
The lens can not "see" that so tiny pixel... or they must use software to reproduction the detail. Not the real detail from the sensor.

Link | Posted on Mar 11, 2017 at 16:24 UTC as 20th comment | 2 replies
On article Canon debuts EOS M6 mirrorless with optional EVF (669 comments in total)
In reply to:

trungthu: M6 is good.
But I don't know why Canon don't (or can't) go to fullframe.
While Canon user's fullframe camera wait for... with all fullframe lenses they have had...
Canon was too late to Sony...

Thanks with same feeling...

Link | Posted on Mar 6, 2017 at 00:02 UTC
On article Canon debuts EOS M6 mirrorless with optional EVF (669 comments in total)
In reply to:

trungthu: M6 is good.
But I don't know why Canon don't (or can't) go to fullframe.
While Canon user's fullframe camera wait for... with all fullframe lenses they have had...
Canon was too late to Sony...

Thanks, I'm saying about mirrorless, not DSLR. I hope Canon go to fullframe on mirrorless camera, I have used Canon 5D, 5DII...
At this time, almost Canon go to 4K motion camera, so they don't care with mirrorless fullframe...

Link | Posted on Feb 20, 2017 at 07:14 UTC
On article Canon debuts EOS M6 mirrorless with optional EVF (669 comments in total)

M6 is good.
But I don't know why Canon don't (or can't) go to fullframe.
While Canon user's fullframe camera wait for... with all fullframe lenses they have had...
Canon was too late to Sony...

Link | Posted on Feb 18, 2017 at 17:04 UTC as 9th comment | 4 replies
In reply to:

trungthu: I cannot see the color bit depth of this camera in this announcement...
They (Pentax) forgot or it only has 12 bit?
With K20D, they have said about the color bit depth of 22... ?

Thanks so much, I have just seen.

Link | Posted on Jan 30, 2017 at 14:58 UTC
In reply to:

trungthu: I cannot see the color bit depth of this camera in this announcement...
They (Pentax) forgot or it only has 12 bit?
With K20D, they have said about the color bit depth of 22... ?

Please show me the link to know this color bit depth.
Or you say it by yourself's thinking...

Link | Posted on Jan 30, 2017 at 14:39 UTC

I cannot see the color bit depth of this camera in this announcement...
They (Pentax) forgot or it only has 12 bit?
With K20D, they have said about the color bit depth of 22... ?

Link | Posted on Jan 26, 2017 at 10:56 UTC as 15th comment | 5 replies
In reply to:

trungthu: I don't know Fujifilm used the anti-aliasing filter or not. The sensor is X-Trans or not, and I think it is not.
While almost all of medium format digital back has 16 color bit depth. Fujifilm GFX 50S only has 14 bit in Raw (and I think 8 bit in TIFF). Very low level when compared to normal medium format digital back...
In this case, maybe Fujifilm goes behind Pentax in medium format...

Thanks chriswy... for this information...

Link | Posted on Jan 26, 2017 at 10:38 UTC

I don't know Fujifilm used the anti-aliasing filter or not. The sensor is X-Trans or not, and I think it is not.
While almost all of medium format digital back has 16 color bit depth. Fujifilm GFX 50S only has 14 bit in Raw (and I think 8 bit in TIFF). Very low level when compared to normal medium format digital back...
In this case, maybe Fujifilm goes behind Pentax in medium format...

Link | Posted on Jan 19, 2017 at 17:48 UTC as 40th comment | 4 replies
In reply to:

IdM photography: Maybe such a sensor, mounted in a FF type body, would offer the possibility to choose between 3/2 and 4/3 aspect ratios with a similar resolution (but not the total 48M resolution, naturally, as it exceeds the image circle of FF lenses)

The image circle of this sensor is only 45.71mm, not exceeds any full frame lens.

Link | Posted on Nov 12, 2016 at 01:30 UTC
In reply to:

trungthu: If Canon uses it in the first full frame mirrorless camera... I think it's very impressive information for the next year to develop the "high-end mirrorless camera" market...
I think, with this sensor dimension, almost all the L-series lens can have enough covering power to afford it...

I know that.
But Canon can make his own sensor...

Link | Posted on Nov 12, 2016 at 01:21 UTC

If Canon uses it in the first full frame mirrorless camera... I think it's very impressive information for the next year to develop the "high-end mirrorless camera" market...
I think, with this sensor dimension, almost all the L-series lens can have enough covering power to afford it...

Link | Posted on Nov 10, 2016 at 16:10 UTC as 5th comment | 3 replies

When someone says "F2" that means "the aperture number is set at... 2".
If one says 1:2 in near the focal length of the lens, that means the number of "the largest aperture" of that lens.
I want to say that "YONGNUO is not a professional lens manufacturer".

Link | Posted on Nov 3, 2016 at 15:49 UTC as 5th comment | 1 reply

Very impressive function...
I hope in a near future it will appear in normal camera...

Link | Posted on Oct 24, 2016 at 16:57 UTC as 1st comment
In reply to:

trungthu: I think, this will be a fault strategy from Fujifilm like as with S5 Pro in the past.
- If they want to go bigger, why unchoose full frame - with reasonable price both in body and lens, and with the popular customers.
- Why they don't choose X-Trans sensor for this camera be the latest model of this line of mirrorless camera. Maybe they only want to show the possibility in camera maker in their weaker position.
- If they can produce a full frame mirrorless camera with the price about $2000 - $3000, maybe they can be a market partner to oppose to Sony in this market place.

- Canon and Fujifilm made their own sensor, not bought from Sony. X-Trans was made from Fujifilm, with differences from others.
- Canon go to full frame very early (maybe the first one). Not a special product from Sony.
- When choosing medium format market parner, this is a new, very new market to Fujifilm, when comare to Phase One, Leaf, Mamiya, Hadselblad... No one can say anything a bout that.

Link | Posted on Sep 30, 2016 at 01:46 UTC

I think, this will be a fault strategy from Fujifilm like as with S5 Pro in the past.
- If they want to go bigger, why unchoose full frame - with reasonable price both in body and lens, and with the popular customers.
- Why they don't choose X-Trans sensor for this camera be the latest model of this line of mirrorless camera. Maybe they only want to show the possibility in camera maker in their weaker position.
- If they can produce a full frame mirrorless camera with the price about $2000 - $3000, maybe they can be a market partner to oppose to Sony in this market place.

Link | Posted on Sep 24, 2016 at 04:48 UTC as 15th comment | 3 replies
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