starbase218

Lives in Netherlands Netherlands
Joined on Sep 20, 2010

Comments

Total: 50, showing: 1 – 20
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In reply to:

Under The Sun: Seriously why care what your students think? Just use what you want to use.

If the purpose is indeed to teach his students, it matters very much what they think. In that respect, an SL1 may be a better tool than a 5D III.

Link | Posted on Jul 4, 2017 at 03:29 UTC
On article Caltech research team develops lensless camera (61 comments in total)
In reply to:

Indohydra: I have no idea how this could work. Please keep an eye on this story.

Visible light, like radiowaves, is basically an electromagnetic wave with a certain frequency. If the light hits the sensor under an angle, the phase of the light will be slightly different at either side of the sensor. The wider the angle, the greater the phase difference. I think that this is what they use, somehow.

Link | Posted on Jun 23, 2017 at 16:12 UTC
In reply to:

TheEmrys: This looks to be quite compelling. Could very well knock off the Sony RX100 in terms of high end compacts.

Put an RX100 in a cheap Chinese underwater housing and it will be able to go deeper underwater and give you better image quality. In fact, I fid this to replace my TG-2.

Link | Posted on May 25, 2017 at 01:50 UTC
In reply to:

Fanous: Something is wrong. The cell phones going to be bigger and bigger and our cameras smaller and smaller... Why?
I no need smaller camera. I have big hands. Generations of photographers had SLR cameras and no one had problem with size. Why now we have to have small cameras?
I believe that Canon will introduce Mirrorless camera with classic EF mount and with the same arrangement of the buttons as DSLRs have. Size can be the same; just can be a little bit thinner.
I think that Canon will introduce a something between DSLR and Mirrorless for professionals first. My idea is they first introduce a camera with big body, mirror and ability to switch into faster mode with mirror lock up and live view. It is necessary to learnt professionals that there is way without the mirror...
When professionals try the way without a mirror, then will be possible to release a new 100% mirrorless body. Sony A9 looks great, but professionals are quite conservative I think.

Cellphones can do much more today than 10 years ago. All that cameras do is take photos.

Link | Posted on May 24, 2017 at 16:13 UTC
In reply to:

Dante Birchen: Just make a limited zoom or fixed focal length with 1 inch sensor tough camera. it could double as a street cam.

If you just want it for scuba diving, I have an RX100 with a Meikon underwater housing that's not too expensive and can go 40 meters. Just add some weight (e.g. to the tripod socket) to make it neutrally buoyant.

Link | Posted on May 17, 2017 at 20:28 UTC
In reply to:

starbase218: 15 meters? That's no improvement, my TG-2 did that.

They state that it is "now 15 meters", like that's more than before, which it isn't.

Link | Posted on May 17, 2017 at 20:24 UTC

15 meters? That's no improvement, my TG-2 did that.

Link | Posted on May 17, 2017 at 12:01 UTC as 60th comment | 2 replies

I have a Pentax Q system and liked the idea, but found it a bit limiting because of the small sensor size and lack of viewfinder. I got a Sony RX100 too and it's much nicer in terms of image quality with its 1" sensor. But I could definitely see myself getting a 1" MILC to combine the best of both worlds (if an underwater housing would be available, as is the case for the RX100).

Link | Posted on Apr 25, 2017 at 16:56 UTC as 47th comment
On article Hands-on with Ricoh's compact Pentax KP (634 comments in total)
In reply to:

JOrmsby: Nikon really needs to step up its game when they release the D7300 and add IBIS like Pentax has. Nice feature set on this one, kudos Pentax!

In my opinion (and I have experience with both), VR is better than SR (IBIS), but SR is better than nothing at all. I can get a sharp shot with my Nikon 16-85 at 85mm and 1/20. With Pentax, I've gotten used to the idea that if I really want a sharp shot, I still have to apply the inverse-focal-length rule (times 1.5 because of the crop factor) most of the time, with SR occasionally helping me out.

Link | Posted on Jan 27, 2017 at 18:38 UTC
On article Hands-on with Ricoh's compact Pentax KP (634 comments in total)
In reply to:

tonybelding: Personally, I don't understand any fixation on "the experience of using an optical viewfinder". I love shooting with an EVF, and I don't get why Pentax are so deathly allergic to them.

Also, is it just me or does the control scheme on this camera look like utter chaos? I mean. . . multiple dials with cryptical markings, plus multiple dials with no markings. This is the first camera I've seen in a while that I think I could pick up and literally not know how to begin operating it.

When the K-01 came out, I didn't really care much for it. I found it an odd looking brick with a chimney on top. But actually, nowadays you can buy it used for not too much money. It's small and light too, and with some Limiteds I'm sure it can produce some great pictures. It's grown on me over time as a fun but high quality camera.

Still, I wouldn't consider it for my main camera. But I'm actually moving from Pentax to Nikon for that, and it's going to be tough to let go of the Limiteds. So maybe I'll get a K-01 for my Limiteds and sell my Q system (don't really use it anyway).

But enough about the K-01.

Link | Posted on Jan 26, 2017 at 11:39 UTC
On article Hands-on with Ricoh's compact Pentax KP (634 comments in total)
In reply to:

JOrmsby: Nikon really needs to step up its game when they release the D7300 and add IBIS like Pentax has. Nice feature set on this one, kudos Pentax!

I have a K-3 and a D7100. I think it's Pentax who needs to step up their game - in the autofocus department. IBIS allows for clever features like auto horizon correction, on-demand AA-filter and pixel shift resolution. But if the AF hesitates and I miss the moment, none of those things matter.

Link | Posted on Jan 25, 2017 at 23:45 UTC
On article Hands-on with Ricoh's compact Pentax KP (634 comments in total)
In reply to:

tonybelding: Personally, I don't understand any fixation on "the experience of using an optical viewfinder". I love shooting with an EVF, and I don't get why Pentax are so deathly allergic to them.

Also, is it just me or does the control scheme on this camera look like utter chaos? I mean. . . multiple dials with cryptical markings, plus multiple dials with no markings. This is the first camera I've seen in a while that I think I could pick up and literally not know how to begin operating it.

I hardly think it's about Pentax being "allergic" to an EVF. It's about the K-mount and its large register distance. If need all that space in your camera anyway, why not use it to put a mirror in there?

AFAIK the only manufacturer of DSLRs who has gone the EVF way with the existing mount is Sony with their alpha series SLTs.

Link | Posted on Jan 25, 2017 at 23:41 UTC
On article Shaking up the market: Pentax K-70 Review (365 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

@Alex Sarbu I was responding to the person who started this thread. He was wondering what happened to Pentax AF, given that he could shoot action photos with his 8-year-old K20D.

I looked at his samples and it turns out his action shots are more like landscape shots with a dog running somewhere: shot fairly wide with bags of DOF. So there's action shots and there's action shots.

About the shots I linked to, I didn't find focus mode in the EXIF but I did amend my post by saying he might have prefocused (either auto or manual) on the bar. So yeah, this is not the best example in terms of AF performance. It does illustrate my earlier point: there's action shots and there's action shots.

It is perfectly possible to take action shots with Pentax. But even things like the AF user interface make it harder, depending on how you take that shot, as the active focus point is not continuously lit. In that regard, I think some other brands just offer you more tools, more ways to take the shot.

Link | Posted on Nov 21, 2016 at 13:19 UTC
On article Shaking up the market: Pentax K-70 Review (365 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 actually took a look at the samples. The angle of view is so wide, and the subject so far away, that the DOF pretty much contains everything. For these kind of "action shots", even the K20D AF would suffice. Hell, even MF would suffice. Just set it to hyperfocal with a big enough F-number and you're done.

On a Dutch Pentax forum, there was a guy wo posted some shots made with his D700 in 2009: http://www.pentaxian.nl/index.php/topic,4401.msg44831.html#msg44831.

I don't think a K20D could do something like this, and even modern Pentax cameras may not be able to.

edit: although, he might have pre-focused somewhere left on the bar and just fire away once the dog jumped over it. Still, there's action shots and action shots.

Link | Posted on Nov 21, 2016 at 09:08 UTC
On article Shaking up the market: Pentax K-70 Review (365 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

@Alex Sarbu Sorry, but I'm seriously getting the feeling that I have to dot every I and cross every T in the limited amount of text I can enter here, or otherwise you'll be all over the post to find something to say I'm wrong, like you are doing now with the hammer comparison. Maybe I should have said "AF performance is a tool, just like a hammer", as it was you who stated that AF had been improved over the years, and I was reacting to that. The fact that I could have been more exact in that post does not contradict my point, and I think you know it.

I do think that entry-level Pentax gear is great value, and a great tool to learn photography. The K-70 has weather sealing, a pentaprism viewfinder and 2 e-dials. And there are weather-sealed kit lenses for it. IMHO though, you might want to re-evaluate whether Pentax is still the best choice if you want to upgrade from there.

Link | Posted on Nov 20, 2016 at 23:12 UTC
On article Shaking up the market: Pentax K-70 Review (365 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

The video I showed you is actually not that good an example when it comes to continuous AF performance. It only shows end-to-end focus speed. For continuous AF, small, incremental changes are needed, and torque is probably more important than pure speed.

I actually tested my 55-300 screwdrive against my 60-250 SDM a while ago. The DA* lens actually goes through the focus range a little faster. But it doesn't do continuous AF so well, because it doesn't get "up to speed" very fast. The screwdrive 55-300 does, which means it doesn't have to catch up so much, which leads to the capability to shoot more frames.

Look at it this way: almost any lens will get from infinity to minimum focus distance in, say, less than 1.5 seconds. Ever had a subject coming towards you that fast?

At least that's my theory, FWIW.

Link | Posted on Nov 20, 2016 at 20:21 UTC
On article Shaking up the market: Pentax K-70 Review (365 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 know that if you look at Pentax's history, it may be perfectly logical for them to be behind Canon and Nikon when it comes to autofocus. It may be very commendable that they are making progress.

However, at the end of the day, a camera is a tool, like a hammer. If I buy a hammer, I buy it to, for instance, drive nails in wood, not because I'm interested in the process the manufacturer has gone through to end up with the hammer I'm buying. I just want the bloody thing to work, because I need to make furniture with it (or whatever).

You are right that I don't know if a new Pentax lens is good enough. But truth be told, I am somewhat disappointed in Pentax, to the point that I won't be trying new lenses anymore anyway. Of course this is personal. But then, you asked a personal question.

And no, not all Canikon lenses focus as fast as their fastest lens. But for the most part, their pro-grade lenses do focus faster than consumer-level lenses. So you won't loose anything by upgrading.

Link | Posted on Nov 20, 2016 at 20:14 UTC
On article Shaking up the market: Pentax K-70 Review (365 comments in total)
In reply to:

GarysInSoCal: SAD... four of the things I find MAJORLY important in my next DSLR camera purchase are 4 of the things this camera FAILED so miserably at... ELEVEN focus points (ridiculous when the competition has anywhere from 39 to 153)... battery life (400 shots/more ridiculous)... NO touchscreen (a option that I would have found majorly convenient to have)... and weight (substancially heavier than the competition... LOVE the price thou. SO PENTAX... back to the drawing board... come out with a K-80 that fixes all the problems listed above... at ALMOST the same cost... and bring your lens prices down somewhere close to Earth PLEASE!

@Hellraiser The K-70 has a polycarbonate body on a stainless steel chassis. But you are right regarding the K-S1 - it was less than 500 grams while having a pentaprism. Interesting.

Link | Posted on Nov 20, 2016 at 19:44 UTC
On article Shaking up the market: Pentax K-70 Review (365 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

"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."

As an APS-C shooter none of the latest Pentax lenses appeals to me (the 16-85 came closest). So I haven't tried any of them myself. I fear Pentax is starting to become more and more like Canon/Nikon in the sense that they won't invest into a pro DA* line anymore, instead investing in fullframe pro-grade lenses and wanting you to upgrade there.

It is your choice whether or not you trust reviews.

"the new Pentax D FA lenses might not be slower than all comparable Canikon ring-type lenses"

https://www.youtube.com/watch?v=udbie3mKJ2E

Link | Posted on Nov 19, 2016 at 19:32 UTC
On article Shaking up the market: Pentax K-70 Review (365 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"

I stand corrected. Still, it doesn't change much.

"we also must recognize progress where/when it happens"

Sure, it's progress. Still doesn't mean it's good enough. Doesn't mean it's not. It's up to you or me to decide on that.

"Your absolute rule of Pentax reserving speed for their consumer lenses is based on one particular lens"

It's not an absolute rule, and I don't think Pentax is doing this on purpose either. It's my conclusion, based on having owned a variety of Pentax lenses, including all DA* zooms, reading reviews and watching Youtube videos of the actual speed. My guess is there's more glass to move in pro-grade lenses, and Pentax somehow hasn't mastered how to move more glass with a similar speed. The 16-50 is OK wrt AF speed, the 50-135 is slow and the 60-250 isn't fast either. The 55-300 (non-PLM) has better tracking performance than either of the DA* teles.

Link | Posted on Nov 19, 2016 at 19:26 UTC
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