Roland Karlsson

Roland Karlsson

Lives in Sweden Stockholm, Sweden
Works as a Programmer
Joined on Feb 23, 2002
About me:

Collector of K-mount and M42 stuff. Main camera K-5. Also interested in camera technology, e.g. Foveon. Also interested in computer based image analysis and transforms.

Comments

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On High Flyer? DJI Phantom 2 Vision+ Drone Review article (133 comments in total)

The image quality is the usual 1/2.4" cr@p. Might look impressive until you take a closer look. Then you see the smearing noise reduction. I think it have to be a 1" before you can call it areal photography. At least in my book areal photography is mostly about image quality.

Direct link | Posted on Oct 17, 2014 at 18:07 UTC as 2nd comment
In reply to:

Roland Karlsson: Woa! Good move Apple! You earned some points there!

Yeah! Seems like I read too fast.

Direct link | Posted on Oct 16, 2014 at 20:43 UTC

Woa! Good move Apple! You earned some points there!

Direct link | Posted on Oct 16, 2014 at 20:37 UTC as 11th comment | 9 replies

There already exists flat zoom cameras, like this one: http://www.dpreview.com/products/nikon/compacts/nikon_cps100.

Just use some mirrors.

Direct link | Posted on Oct 1, 2014 at 08:35 UTC as 6th comment | 2 replies
In reply to:

misolo: I'll repost my comment here for replies in case anyone has thoughts on this: if there truly is a demand for optical zooms in phone cameras, why doesn't anyone do a module with three different lenses selectable from an internally rotating disk? The camera module would still be very compact (with no outside 'hump'), certainly not a problem to fit inside today's oversized phones and in tablets. It seems that 70mm is still amenable to 'pancake' designs, so something like 24/40/70 should work and would be a vast improvement over the usual fixed 27 or 28 designs. If such a simple solution is readily available with existing technology and nobody's doing it, is there really demand to justify the development of new technologies like the one described in this article?

I would think it would be cheaper and easier to have three separate cameras. There already are two cameras on phones. Why not add two more?

Direct link | Posted on Oct 1, 2014 at 08:32 UTC
On Windy cruise deck in the wind challenge (3 comments in total)

That guy needs a shave - badly! :)

Direct link | Posted on Sep 30, 2014 at 13:21 UTC as 1st comment
On Canon EOS 7D Mark II beta image samples article (36 comments in total)

Where did my "bouncing girl" camera comment go?

Direct link | Posted on Sep 26, 2014 at 20:31 UTC as 1st comment
In reply to:

Roland Karlsson: I sometimes scan drawings. Then it is important that the lens system is rectilinear, or there is some compensation. For my old Perfection 3200, it is not. So, the resulting scan gets slightly compressed along the long side.

Any way to find out how linear scanners are?

No ... it is absolutely no problem wit scanning linearity along the movement direction. It is opticla distortion in the lens.

Direct link | Posted on Sep 25, 2014 at 20:47 UTC

I sometimes scan drawings. Then it is important that the lens system is rectilinear, or there is some compensation. For my old Perfection 3200, it is not. So, the resulting scan gets slightly compressed along the long side.

Any way to find out how linear scanners are?

Direct link | Posted on Sep 25, 2014 at 20:10 UTC as 34th comment | 3 replies
On Canon EOS 7D Mark II First Impressions Review preview (1866 comments in total)

WOA! It is a bouncing girl camera!

Direct link | Posted on Sep 25, 2014 at 20:04 UTC as 19th comment | 1 reply
On Panasonic Lumix DMC-LX100 First Impressions Review preview (1415 comments in total)
In reply to:

Roland Karlsson: It looks nice. Maybe made a mistake when buying RX100 III ?

Thanx @shadow. I was once a proponent for the aperture, time, focus interface. Because it is there from I come. But, PASM plus two wheels is faster if you dedicate the wheels to sensible things. So, without know it you gave me an argument against :)

Do not get me wrong, For a larger more slow worked machinery I would love it.

Direct link | Posted on Sep 24, 2014 at 15:08 UTC
On Photokina 2014: Ricoh stand report article (150 comments in total)
In reply to:

Dehruale Hitler: This Christmas tree with holiday lights? It's a shame that once a respectable company steadily degraded.

What? Degraded? Pentax makes fantastic cameras. Both in customary black and in all the colors you can think off. And actually, those frivolous colored things are real cameras. Nothing has degraded.

If you want to look at degradation, search for minox and rollei mini digital cameras. That is a shame.

Direct link | Posted on Sep 23, 2014 at 21:33 UTC
On Panasonic Lumix DMC-LX100 First Impressions Review preview (1415 comments in total)
In reply to:

Roland Karlsson: It looks nice. Maybe made a mistake when buying RX100 III ?

"The purpose of this kind of camera" Hmmmm ... they are not exactly the same kind of camera with the same kind of purpose. The RX100 is smaller and the LX100 looks more comfortable (at least to me) which cost in some more bulk and weight.

Direct link | Posted on Sep 23, 2014 at 19:17 UTC
On Panasonic Lumix DMC-LX100 First Impressions Review preview (1415 comments in total)
In reply to:

Roland Karlsson: It looks nice. Maybe made a mistake when buying RX100 III ?

The RX100 III is a nice camera, except I find it too small. The LX 100 look very nice to hold. One of my favourites to hold is Canon G10. Comparing G12 and LX 100 at camerasize,com shows that the Panasonic might also be nice to hold.

Direct link | Posted on Sep 23, 2014 at 08:22 UTC
On Panasonic Lumix DMC-LX100 First Impressions Review preview (1415 comments in total)

It looks nice. Maybe made a mistake when buying RX100 III ?

Direct link | Posted on Sep 23, 2014 at 03:03 UTC as 65th comment | 12 replies
On Sigma announces dp1 Quattro article (199 comments in total)
In reply to:

Debankur Mukherjee: This camera was surely designed in Mars.........

He said "in Mars". That is a month, I think. If it had been designed on Mars, by Martians, then it would have been "on Mars". But what would I know, not being a native English speaker :)

Direct link | Posted on Sep 16, 2014 at 13:27 UTC
On Fujifilm X30 (beta) real-world samples article (94 comments in total)

@steelhead - so, your phone can take the sun flower and the green tractor image?

Do not think so.

I agree that most images in this set looks so so, but I assume it is not the camera that is at fault.

Direct link | Posted on Sep 2, 2014 at 16:37 UTC as 32nd comment
On Hands-on with the Pentax K-S1 article (321 comments in total)
In reply to:

Doka: This camera is a disaster for left-handed people, when the ergonomics are very wrong, then it becomes a tupperwarebox, no matter the specifications.

Disaster? This camera? All cameras are mainly made for operating with the right hand. Lefties have had to live with that for ages. BTW - if they really did make mirrored cameras for lefties, I am quite sure I could operate it with my left hand, even though I am right handed.

Direct link | Posted on Aug 29, 2014 at 08:25 UTC
On Hands-on with the Pentax K-S1 article (321 comments in total)
In reply to:

drummercam: Comparing the Pentax K-S1 to the Pentax K-50 is definitely a good way to avoid having to compare it to Canon's 2014 entry-level DSLR, the EOS 1200D (Rebel T5). I don't think the pentamirror, mono-microphone, 3fps, 0.8mag viewfinder, 460K-dot LCD EOS 1200D compares favorably at all, and the price difference is buying solid features, including build, no doubt.

And since "looks" get most of the troll action here, that black blob of a Canon lacks all distinction. Also obvious just by looking -- since looking is all that the complainers about the K-S1 have done as of yet -- is that if Pentax intended to present a less intimidating user interface, comparing K-S1 to the EOS 1200D wins the point easily.

DPR also again shows some anti-Pentax bias by listing (according to the "side-by-side" feature) the EOS as a "Compact SLR" and the Pentax as a "Mid-size SLR." The Canon is apparently 130 x 100 x 78mm, while the Pentax is 121 x 93 x 70mm. I guess compact is bigger than mid-size now?

Yes, and that is a good thing. Pentax do not make cheap cameras, in the meaning of cheaply made. Even the K01 was solid. I used an entry level Canon some years ago - and that was cheap - really cheap.

Direct link | Posted on Aug 28, 2014 at 21:28 UTC
On Hands-on with the Pentax K-S1 article (321 comments in total)

It has SR with AA filter simulator and most functionality from more advanced cameras. Not easy to make it cheap then. You have to sacrifice some in order to make it cheap.

Direct link | Posted on Aug 28, 2014 at 19:40 UTC as 40th comment
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