Alex Sarbu

Lives in Romania Romania
Joined on May 25, 2006

Comments

Total: 443, showing: 1 – 20
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On article Lily Robotics sued over claims of false advertising (84 comments in total)
In reply to:

MikeFairbanks: I'm not surprised by this at all. I first heard about the drone a year and a half ago, and thought it was so cool. The promotional video was shown on the big screen at an educational technology conference I attended.

When I looked it up and saw the low introductory price for early orders, I thought it was too good to be true. It was around 500 bucks, and I thought there was no way someone could make a drone do all that (tracking the subject after being tossed into the river, etc.) for five hundred bucks.

After about a year I started seeing complaints online about the delays and began to suspect that the product wasn't happening.

Finally, if they faked the promo video, that is not cool. I wonder the same thing about the Cicret wrist band that projects a smartphone screen on the arm. I saw the promo video at the same convention. No product yet that I can find. And the video appears to have a different design than what they are now showing. Was that video faked?

The Cicret wrist band is physically impossible.

Link | Posted on Jan 13, 2017 at 21:02 UTC
In reply to:

Joe Ogiba: Pentax /Ricoh camera users have zero interest in cameras that don't take photos.

That's why the Ricoh Theta is so successful.

Link | Posted on Jan 4, 2017 at 18:12 UTC

Imagine going at a wedding with your Canon 1Dx MkII, and a bag of Canon L lenses... then, being told how your gear is fake, just like Adibas and Mike and Puna ;-)

Link | Posted on Dec 28, 2016 at 21:49 UTC as 271st comment
On article Our favorite gear, rewarded: DPReview Awards 2016 (270 comments in total)
In reply to:

thegreat26: Pentaxians Assemble.........
Seriously D500 i think is the best out there but my K1 nowhere......

They say: "Last year, for the first time, we decided to get together as a team and discuss what we thought was the best gear of the year in multiple categories. This year we sat down again and made a list, checked it twice, then talked about it. And then talked about it some more, and then made a shortlist. And then we talked about it again, argued a bit, and finally voted, ranking our choices by first, second and third preference."
From what I understand it was their choice; the user polls are a separate matter.

Link | Posted on Dec 27, 2016 at 09:33 UTC
On article Our favorite gear, rewarded: DPReview Awards 2016 (270 comments in total)
In reply to:

thegreat26: Pentaxians Assemble.........
Seriously D500 i think is the best out there but my K1 nowhere......

First step was to deliver the essential zooms, primes are scheduled for the next year.

Link | Posted on Dec 26, 2016 at 17:34 UTC
On article Our favorite gear, rewarded: DPReview Awards 2016 (270 comments in total)
In reply to:

thegreat26: Pentaxians Assemble.........
Seriously D500 i think is the best out there but my K1 nowhere......

I'd call the D500 the best sports/wildlife camera of the year, while the K-1 would be the best landscape camera of the year.

Link | Posted on Dec 26, 2016 at 13:39 UTC
On article 2016 Roundup: $1200-2000 ILCs part 2: Full-Frame (366 comments in total)
In reply to:

Class A: @DPreview: Have you ever compared the number of modern lenses available for the K-1 compared to FE lenses for the A7II?

Please see this list of FF lenses that are currently available for the K-1: http://www.pentaxforums.com/forums/190-pentax-k-1/314559-ff-lenses-k-1-can-bought-new.html

AFAIC, there are no grounds at all for pointing out a scarcity of lens selection for the K-1. I realise that the A7 series can accommodate many more lenses than just its (rather limited) native FE lenses through adapters but adapters come with their own set of problems (precision, handling, size, AF compromises). Have you never experienced AF issues due to third-party adapters/lenses on the A7 series? I have.

BTW, not only people already owning K-mount lenses can benefit from a vastly wider selection. Even people new to Pentax have access to the used lens market which offers a number of great gems.

You should count the DA lenses which are actually FF according to the manufacturer (there are 3 of them: the DA* 200mm f/2.8, the DA* 300mm f/4 and the DA 560mm f/5.6); a label doesn't change what they are. It's fine to skip the other DA lenses, even though some of them do cover FF (with limitations).

That, unless this is actually a brand war and brand X must "win" over brand Y no matter what.

Link | Posted on Dec 9, 2016 at 00:01 UTC

There are 2 cameras which IMO stands out from that list:
- the Pentax K-1 - a landscape photographer's dream
- the Nikon D500 - an action shooter's dream
Though, of course, all of them are amazing.

P.S. Hello, Barry! ;)

Link | Posted on Dec 8, 2016 at 12:54 UTC as 50th comment | 1 reply
In reply to:

Satyaa: I am not up to speed on Pentax developments but I am guessing that the latest K-70 and K-3 II already support this lens. Is that right?
Thanks.

There are currently 7 Pentax DSLRs supporting this lens: K-50, K-S1, K-S2, K-70, K-3, K-3 II and the K-1.
So the answer is yes.

Link | Posted on Dec 2, 2016 at 22:59 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

My bad, then - it was too many posts ago, and since then we had a lengthy discussion about (I hope) Pentax AF advancements ;-)

I guess we agree on this point; the K20D's AF was nothing to write home about, and it wasn't helped by the 2008 era lenses.
How you would approach sports with a recent Pentax camera with their recent lenses is another issue, one I'm still investigating. But I can say with certainty, there's a night and day difference.

I had the K20D, yes, the body was quite comfortable to hold. The new style bodies (I skipped the K-7 and got the K-5) aren't bad at all, though, and I find their deeper grip better.

The active focus point not being continuously "lit", that's not an issue except in low light IMO (when you can't see the black markings). I'm not sure what kinds of sport you'd shoot in such conditions. But if you used the K-1 and reached a different conclusion...
(the K-1 is so far the only Pentax camera using a LCD overlay)

Link | Posted on Nov 21, 2016 at 13:41 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

Sigh...
K20D? A camera launched in 2008? How on Earth is it relevant to AF advancements being made (or not)?

As for your D700 samples, look at the 3rd picture: the dog's head is out of focus; and the EXIF says it was made with manual focus. I don't know what you're trying to prove... but definitely not Nikon's AF superiority.

OTOH, on the Pentax SLR Talk section, people posted action shots taken with the K-1. Including swallows in flight (that took some skill!).

Link | Posted on Nov 21, 2016 at 10:42 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

Sorry; I'm just trying to make my point - that a camera is a complex tool serving an astonishing range of "needs", AF being only one aspect. No matter the cost (and cost is actually a factor), you cannot make a camera "better" at anything than all the others. So you'll have to choose.

And let's not forget that the discussion was about Pentax making advancements in AF; it wasn't about if they are on the same level as Canikon. For you, the difference might be irrelevant as you might need Canikon-level AF *now*; for me and many others, Pentax is still overall a better choice - and AF advancements means expanding the area of comfortable usage.

If the higher-end Pentax equipment is "the best choice" or not, it depends on those choosing. I already called the K-1 a landscape photographer's dream, and then there's the medium format.

Link | Posted on Nov 21, 2016 at 00:02 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

You are correct, a camera is a tool; however, it's a tool that is not defined solely by its autofocus. Considering the whole package, Pentax is a very good choice for many. Would I recommend it for hardcore wildlife shooters? Surely not; but cameras are not only used for wildlife - a comparison with a tool which only does one thing (hammer) is terribly wrong.
Let's take the K-70 for example - it does have advantages over its direct competitors, a better viewfinder for example, or a better, WR build.

Or, let's take the K-1: it's a landscape photographer's dream. But, Pentax is getting better at action, too. That's a good thing.

My experience regarding the DA* 60-250 vs. 55-300 is very different - the DA* being slow at the end-to-end "focus" speed but working better at small corrections.
The D FA 150-450 is a different beast.

Link | Posted on Nov 20, 2016 at 22:10 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

Any significant progress is good; and let's be realistic, there's no way for "Pentax" (actually, Ricoh Imaging) to catch up with Canon/Nikon immediately. They made significant steps forward, this should be recognized as such.

Besides, you can't know if it's "good enough" or not without *using* these products, don't you think? ;-)

All the DA* lenses were launched between 2007 and 2008. All of them. They represent Pentax' first attempt at a proper in-lens AF motor solution (not counting the KF experiment).
So when you talk about DA*s, you're talking about old technology and you must not judge Pentax' "advancements" in AF by those.

Please re-read my statement, carefully. I never said Pentax' is as fast as Canikon's fastest. But then, is every Canikon lens as fast as their fastest? ;-)
It's the Nikon 200-500 which I suspect to have a motor not faster than the D FA 150-450's. I say "suspect" because all I saw were videos similar to what you're showing me.

Link | Posted on Nov 19, 2016 at 21:02 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

By the way, the new Pentax D FA lenses might not be slower than all comparable Canikon ring-type lenses.

Link | Posted on Nov 19, 2016 at 18:19 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

Getting back to the original subject - that of "Pentax" making AF advancements, let's see what was done under Ricoh, between 2013 and 2016:
- Pentax AF systems with -3EV sensitivity (which, at that time, was better than the competition)
- first Pentax AF system with advanced subject recognition and tracking functions, using a 86k segment RGB metering system (K-3)
- improvements on DC motors (D FA* 70-200, D FA 150-450)
- first Pentax camera with on-sensor PDAF - that's the K-70
- the introduction of the PLM motor

There's still much to do, but I'd call it progress.

Link | Posted on Nov 19, 2016 at 18:07 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

No, Canon USM is not always ring-type - but you don't have to believe me, look what Canon says on this matter: "there are three types of USM motor - the ring-type, Micro and Micro II types".
http://cpn.canon-europe.com/content/education/technical/usmlens_technology.do

Yes, we have to be aware of the current situation; but we also must recognize progress where/when it happens. The PLM motor is exactly this: progress. Even the DC motors from the new D FAs are a progress (from my limited testing).

Your absolute rule of Pentax reserving speed for their consumer lenses is based on one particular lens - the PLM, which is the newest Pentax lens. We have yet to see in which lenses they'll use this new motor.
Even more, IIUC you were unable to evaluate the lens personally, and you're talking about what you read in some reviews. I don't trust reviews.

Link | Posted on Nov 19, 2016 at 17:59 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

"I'm doing my part" is also a truthful statement. It's called putting my money where my mouth is.
There would be no reason for Pentax to advance anything if we'd all use cheap screw drive lenses and Tamrons.

Perhaps a ring-type motor is unsuitable for the volumes Pentax is working with? I'm not sure if they have to make a motor for each lens, or just several types.
Besides:
a. neither Canon nor Nikon, AFAIK, are using ring-type motors all over their lens line
b. newer AF motor types might replace ring-type motors, at least for some applications (STM, nano USM). Pentax' PLM is one of those.

Link | Posted on Nov 19, 2016 at 16:28 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

I'm saying it because it true, that's the fundamental idea behind any business.
And it doesn't conflict one bit with your right to choose which brand you'd use and support. OK, go Nikon if that gives you the AF performance you need; Nikon needs our money too. Or Canon. Or whatever.

But perhaps you believe "Pentax" could do much better with less or no R&D money?

Link | Posted on Nov 19, 2016 at 14:22 UTC
On article Shaking up the market: Pentax K-70 Review (335 comments in total)
In reply to:

odpisan: Just asking if anybody knows the explanation ...
__________________
In review is AF of K 70 - it seems - is one of big problems.

I wonder how is that possible?

A month ago I made 400 pictures with twin brother of Pentax K20 - my 8 years old (!!) Samsung GX20. Also action. Only 12 photos were out of focus.

12 of 400 ???

BTW: 8 years old battery was not even beginig to loose some power .. indicated as full at the end of photo-day. So it had moore than enough power to save everything on pc & after that savig, indicator still showed that batery is full.

Question:
What is happening with new cameras?

Samples:
https://goo.gl/photos/32KZFQNfeTmpbc449

You don't get it. It is your decision, nobody's taking this from you.
It's your right to decide which brand you'd use and implicitly support.

What I said is that the PLM AF system is very different from the screw drive. It doesn't need to me compared with the old, abandoned SDM* micromotors. It doesn't use a technology introduced in 1987. It's progress.

I also had the DA* 60-250, and its main issue was that I had to avoid losing the subject (and therefore the hunting that followed). I've also seen a screw drive lens not being able to focus at all (at a certain distance), because its loose AF mechanism couldn't position the optics accurately enough.
I don't care about reviews; DPReview's are quite random - and Pentaxforums is still insisting the DA 560mm is not a full frame lens. At most they could give me a hint about something, but in the end, it's the personal experience that matters.

* the D FA 15-30 and D FA 24-70 are using another type of "SDM", which is actually Tamron's USD.

Link | Posted on Nov 19, 2016 at 13:51 UTC
Total: 443, showing: 1 – 20
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