Xentinus

Xentinus

Lives in United States United States
Joined on Apr 4, 2010

Comments

Total: 489, showing: 1 – 20
« First‹ Previous12345Next ›Last »

They are producing lenses, much more cleaner than the food which is produced in KFC or McDonald's.

Link | Posted on Mar 21, 2017 at 08:56 UTC as 30th comment
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

Reactive: Has anybody here stood very close to a 4K TV and tried to see the individual pixels? Want to try 8K? Whether its a 60" home TV or a 60 ft stadium screen, 8K is pointless for human eyes. Its only purpose (just like the '3D revolution') is to give something 'new' and 'better' for manufacturers to sell us. I'd much rather Olympus stopped at 4K and devoted their R&D budget to improving image noise and dynamic range.

.

Link | Posted on Mar 14, 2017 at 04:20 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

Ab Latchin,
Yes, I already knew. It is foveon sensor which shows incredible detail.
I also said; if you attach the exact same Sigma lens to a Canikon high resolution camera, it will NOT able to show the same amount of details. This alone proves everything. There is no conflict in my words.

These are *your* words;

"You just don't understand what this HR mode does. It is exactly like a high resolution sensor. The only difference, and the reason the PEF F looks better than the Pentax 645 is we get a full colour 40mp file while the pentax is a bayer 50mp sensor. So when we enlarge the Pentax to the Pen RAW size, the resolution loss from the bayer array jumps out."

Did you notice something? You are talking about sensor and the sensor only. Your observations are all about the sensor, but somehow your conclusion is about the lens.
Suddenly you say "so this 45mm lens can resolve if it was 50mp sensor". You still mean bayer sensor of course. Cause Olympus doesn't use foveon sensor.

Link | Posted on Mar 14, 2017 at 03:51 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

To test something scientifically,at first you can change just one parameter each time. Once you observed the correlation between 2 parameters, then you can change others.
Apples to apples please. Foveon sensor technology (despite its flaws), lets Sigma to show more detail, even if the lens is not close to be perfect. It is the SENSOR's structure which obtain the information of the scene.
Of course the lens has its own part too. But if you put a Sigma 50mm 1.4 A lens on a foveon body and compare it to smilar full-frame Canikon counterpart with the exact same lens, the result will tell you that you are completely wrong.

This video will give you ANOTHER logical evidence. But if you still can not understand, I have nothing else to do. I rest my case ^^

https://www.youtube.com/watch?v=yyOmgArU0MA&feature=youtu.be

notice 6:25 VS 9:35!

This is the same thing what Tomi O said above. This time about Otus' results!

Link | Posted on Mar 13, 2017 at 09:07 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

In HR mode, the lens has to resolve less pixel for every single image (comparing 50mp native sensor). But since the sensor shifts, it obtains different information for each image. Then processor does the job.
The logic behind the foveon sensor is similar.In HR mode, the lens doesn't have to resolve all pixels AT ONCE.
Really claiming that "It shows amazing details in HR mode, so it can handle 50mp sensor too" is silly (Im being nice).

Link | Posted on Mar 12, 2017 at 19:21 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

"I am chiming in one last time. So can the PEN F resolve more than a Pentax 645 Z in a single image. NO. Noone claimed that. What is clear is that with the 45mm f1.8 in HR mode the PEN can out resolve the 645Z."

The thing we are discussing is not this. Don't twist the words!

The question is, IF it was a 50mp sensor, would 45mm 1.8 resolve? the answer is NO!

Link | Posted on Mar 12, 2017 at 18:49 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

Ab Latchin,
Thank you for the link.
Above I sent the link which shows amazing resolving power of foveon sensor!
Foveon sensor.
Again foveon SENSOR. SENSOR...See the thing which shows amazing details is not lens! Sensor!
Did you finally understand? You are insulting people but you can not understand one simple thing!
HR mode works just like that.
http://www.imaging-resource.com/PRODS/pentax-k1/ZPIXELSHIFTRES.png

So again it shows more details comparing full-frame or even medium format (in the link you have shared above). This doesn't prove it can resolve 50mp!

Link | Posted on Mar 12, 2017 at 18:44 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

Tomi O,
What you have just said, is a physical evidence. Beside that, it is easier to prove via Pentax cameras and lenses. Because Pentax has a high resolution full-frame sensor, while there is also APS-C sensor with lower resolution.
For example;
43mm 1.9 Pentax Lens + K-1 VS 43mm + K-3 Mark II VS 43mm + K-3 Mark II HR mode
IF*** the result with 43+K3 HR mode shows more details comparing 43+ K1, the question will be simple:
why 43mm can not resolve 36 megapixel?

Link | Posted on Mar 12, 2017 at 18:36 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

...
-Why modern lenses are pretty big, comparing old prime lenses? Why companies started to produce telecentric lenses?

Link | Posted on Mar 12, 2017 at 15:14 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

You guys have a claim, but all you can do is to say "HR 50 mp, so the lens can resolve 50 mp". No physical or logical evidence.
In HR mode, every image is just 20 mp. I don't understand how you can claim that; the lens can resolve 50/80 mp, with simply zero evidence.

I will try to write logical evidences down.

-When Nikon released 36 megapixel D800, Zeiss announced Otus 1.4/55 in 2013. Because they knew to resolve 36 mp sensor, requires new lenses.
But you claim an Olympus 45mm 1.8 (which is announced in 2011) can already resolve 50/80 mp.
-"The other advantage towards this pixel-shift mode is it also reduces noise. At ISO 1600, the Olympus shows slightly less noise when compared to the a7R II (despite the Sony's much larger sensor)" DPR says in this page;

https://www.dpreview.com/reviews/olympus-pen-f/10

So would you also claim that a 50/80 mp 4/3 sensor can give you clean output at high ISO?

...................................

Link | Posted on Mar 12, 2017 at 15:07 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

"I actually use the system every day and the high res mode. I have also done tests to show the better the lens, the better the result."
This doesn't prove your claim. Of course better lens will resolve better. Because a better lens will also resolve better when it is one single image,duh! Using technology doesn't mean you understand the science behind it.
Tomi O is right and pretty logical.
In every image you took by using HR mode, the lens resolves ONLY 20 mp each time (for E-M1 Mark II). But since the sensor is moving slightly, every time it matches other fine details from the scene.

Link | Posted on Mar 12, 2017 at 02:07 UTC
On article Olympus working on 8K video for Micro Four Thirds (218 comments in total)
In reply to:

falconeyes: An 8k sensor in 4:3 aspect ratio has 44.2+ MP. µFT won't be the most economical form factor for such resolutions, taking lens cost into account (because of the excessive resolution requirement).

https://www.dpreview.com/reviews/image-comparison/fullscreen?attr18=daylight&attr13_0=nikon_d610&attr13_1=olympus_penf&attr13_2=sigma_dp1m&attr13_3=nikon_d800&attr15_0=raw&attr15_1=raw&attr15_2=raw&attr15_3=raw&attr16_0=100&attr16_1=200&attr16_2=100&attr16_3=100&attr126_1=normal&attr171_1=off&normalization=full&widget=28&x=0.8191165489114827&y=0.6650299401197604

Link | Posted on Mar 11, 2017 at 03:44 UTC
On article Cinetics Lynx motion control system review (9 comments in total)

Such an awesome review. I love that "updates I'd like to see" part very much. Thanks for your effort!

Link | Posted on Mar 7, 2017 at 14:56 UTC as 5th comment | 1 reply
In reply to:

DPPMetro: This lens kills the new Pentax 70-300. This should win some people over from the Pentax camp, no doubt.

why don't you show your own evidence? oh you don't have any?
It is your claim, and you have written "the FACT" above. Prove the FACT, if you can!

everyone else is you? I mean you some guys who have no idea what they are talking about!
Patent link is pretty obvious, and lens design too...they are in English! Im not sorry if the truths hurt you.
Yes Tokina designed the lens but let Pentax to get the patent. :)

"[In the announcement, the company explained that "the two companies are not OEM relationships, they are jointly developed". Even if the optical system is the same, the specifications of the mechanical parts and the direction of design are different(...)]

[Even if the optical system is the same]"
So optically designed by Pentax, mechanically they are different...what you understand from this, is those lenses are rebranded Tokinas? :))

Link | Posted on Mar 5, 2017 at 00:28 UTC
In reply to:

DPPMetro: This lens kills the new Pentax 70-300. This should win some people over from the Pentax camp, no doubt.

This also explains the situation very well. You just need a little brain to understand...sigh!
https://www.dpreview.com/forums/post/24610906

Link | Posted on Mar 4, 2017 at 06:25 UTC
In reply to:

DPPMetro: This lens kills the new Pentax 70-300. This should win some people over from the Pentax camp, no doubt.

the davinator,
this is the optic formula of Pentax 50-135 2.8
http://www.bdimitrov.de/kmp/lenses/zooms/_optics/50-135f2.8.gif

and once again patent link, EVEN you can understand that it is the same formula
https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&NR=2007188888&KC=&FT=E

Let me tell you what is cute;
claiming that they are rebranded Tokina lenses JUST BECAUSE once you owned them is cute. Illuminati confirmed!

Link | Posted on Mar 4, 2017 at 06:08 UTC
In reply to:

DPPMetro: This lens kills the new Pentax 70-300. This should win some people over from the Pentax camp, no doubt.

Entoman,
yes really it is weird...They have claimed, ok maybe they didn't know. But they INSIST with no evidence, this is really interesting.

Here is the patent:
https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&NR=2007188888&KC=&FT=E

And you can read Douglas_of_Sweden's comment on this page. He says "And before anyone repeat the stupid claim that Pentax did not design this lens, here is the patent"
which I agree 100% .

https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/57490-any-idea-why-tokina-did-not-make-50-135mm-pentax-mount.html

I recommend you to check this page to learn more about Pentax lenses.
http://kmp.bdimitrov.de/lenses/

Link | Posted on Mar 4, 2017 at 03:57 UTC
In reply to:

octovian: I have tamron 70-300mm vc and I am not very satisfied with its performance especially at 250-300mm. I have been really tempted by this lens. Do you guys think that this lens will be better than the tamron one especially at 250-300mm range?

I doubt really.

Link | Posted on Mar 3, 2017 at 22:09 UTC
In reply to:

DPPMetro: This lens kills the new Pentax 70-300. This should win some people over from the Pentax camp, no doubt.

I didn't mention 16-50 because Canikon have smilar lenses (despite they are not rugged).
Those lenses are made by Pentax, not Tokina rebranded. And you said "They rebranded tokina and tamrons lately"...lately.

Those lenses are designed by Pentax and Tokina released its own version. Which means those are rebranded by Tokina, not Pentax.

http://www.bythom.com/Tokina50-135mm_lens_review.htm

Link | Posted on Mar 3, 2017 at 15:38 UTC
In reply to:

DPPMetro: This lens kills the new Pentax 70-300. This should win some people over from the Pentax camp, no doubt.

I criticize Pentax very bad, but lets be fair. They have made killer lenses.
50-135mm 2.8, 10-17 fisheye, 60-250 f4 and their limited lenses are/were killer. Even kit lenses of Pentax have WR and metal mount.

BTW, They have rebranded Tamrons but not Tokina.

Link | Posted on Mar 3, 2017 at 15:33 UTC
Total: 489, showing: 1 – 20
« First‹ Previous12345Next ›Last »