Martinka

Martinka

Lives in Czech Republic Czech Republic
Has a website at www.martinkozak.com
Joined on Oct 21, 2009

Comments

Total: 58, showing: 1 – 20
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In reply to:

Roland Karlsson: So, I have read several comments here. If you say it is fantastic and imaginative you get applauded. If you say you do not like it or it that is quite common, then you are jumped at and someone will demand you show your own imaginative work. The thread itself is more interesting than the pictures. Or maybe not, the thread is actually quite predictive.

Now, regarding the images. I think the first is good. It is unexpected. Why both a flame and a scissor? Makes you think.

The rest are cute. Nothing wrong with them. Nothing special either. The light bulb is a good performance though. Nice that he got the reflections correct.

Eric: "I do not like it" is exactly the same useless as "I like it". But for some reason no one ever wanted anyone to explain what do they like about it.

Direct link | Posted on Jul 19, 2015 at 09:54 UTC

Similar to Foldio
http://orangemonkie.com/foldio2/

Direct link | Posted on Jul 17, 2015 at 18:57 UTC as 25th comment | 2 replies
In reply to:

Martinka: So how exactly woudl higher DxO Mark help me to produce better pictures?
www.artofsport.cz

I have several 110x70 cm and they look fine. But what do I know, 120x80 would maybe be better with Nikon :)

Direct link | Posted on Jul 9, 2015 at 21:23 UTC

So how exactly woudl higher DxO Mark help me to produce better pictures?
www.artofsport.cz

Direct link | Posted on Jul 9, 2015 at 21:07 UTC as 100th comment | 6 replies
On Sony: An eye on focus article (758 comments in total)
In reply to:

Martinka: Why do you always stop for a while before taking the shot? This is not a typical usage of AF-C, so this test is more or less useless.

Just tell me when in real situation when shooting moving subject the subjects stops for a half second and let you focus while still? And when subject is not moving, testing AF-C makes no sense.

Direct link | Posted on Jul 2, 2015 at 19:35 UTC
On Sony: An eye on focus article (758 comments in total)

Why do you always stop for a while before taking the shot? This is not a typical usage of AF-C, so this test is more or less useless.

Direct link | Posted on Jul 2, 2015 at 19:20 UTC as 94th comment | 9 replies
In reply to:

alouette: although the Swiss Currency is stronger than ever, the official Prices are ridiculous high (up to 20%!) in Switzerland compared to the USA:

Prices excluding VAT:
500mm/F4: CHF 11'017 or $ 12'106
600mm/F4: CHF 13'146 or $ 14'446

$ to CHF calculated with a quotient of 0.91 which was the rate yesterday morning, before the Swiss National bank started to weaken the CHF due to the upcoming GREXIT...

Hmmm :-/

Direct link | Posted on Jul 2, 2015 at 12:04 UTC
In reply to:

falconeyes: I am puzzled by the MTF differences of 500E vs. 600E. The 500 looks a lot better. Not sure if this is real. But just in case, I digged further ...

The 600E has a (relatively) larger reduction in weight and a second front lens which is smaller in relation to the first one than the 500E. It looks like the 600E is more compromise between weight and wide open performance than the 500E -- of course both being stellar. But with a TC and high resolution body, could be that the 500E ends up having more reach than the 600E ;)

OTOH, could be that those MTF on Nikon site are artificial and not very meaningful in practice.

Might be the urge to make it lighter than Canon :)

Direct link | Posted on Jul 2, 2015 at 11:06 UTC
In reply to:

alouette: although the Swiss Currency is stronger than ever, the official Prices are ridiculous high (up to 20%!) in Switzerland compared to the USA:

Prices excluding VAT:
500mm/F4: CHF 11'017 or $ 12'106
600mm/F4: CHF 13'146 or $ 14'446

$ to CHF calculated with a quotient of 0.91 which was the rate yesterday morning, before the Swiss National bank started to weaken the CHF due to the upcoming GREXIT...

VAT, exchange rate between Yen and CHF...

Direct link | Posted on Jul 2, 2015 at 11:04 UTC

MTF of 500 mm looks pretty impressive:
http://nikonrumors.com/wp-content/uploads/2015/07/Nikon-AF-S-NIKKOR-500MM-F4E-FL-ED-VR-MTF-chart.jpg

Direct link | Posted on Jul 2, 2015 at 06:26 UTC as 29th comment | 1 reply
On Beyond the table top: 5 mini tripods reviewed article (153 comments in total)
In reply to:

Don Sata: In the list you missed a rotary leg die cast aluminum type table tripod like these:

http://www.bhphotovideo.com/c/product/254830-REG/Delvcam_DELV_DTM_DELV_DTM_Mini_Tripod_for.html

http://www.bhphotovideo.com/c/product/1070031-REG/vanguard_vs_34_tabletop_tripod_metal_with.html

They are super cheap, super resistant and the varying leg angle makes them more useful for tricky surfaces or even for using your own chest as a support.

I use Focus for several years and probably was the first user here in Czech republic. I've tried it with 1D + 300/2.8 lens (about 4 kg total). BUT. Legs need to be completely straight. Surface which the tripod is standing on must be rough, otherwise legs tend to slide to the sides. It's very unstable and flimsy and shaky. With such a load I'd recomment it only in an emergency.

Direct link | Posted on Jun 30, 2015 at 16:49 UTC
On Beyond the table top: 5 mini tripods reviewed article (153 comments in total)
In reply to:

Don Sata: In the list you missed a rotary leg die cast aluminum type table tripod like these:

http://www.bhphotovideo.com/c/product/254830-REG/Delvcam_DELV_DTM_DELV_DTM_Mini_Tripod_for.html

http://www.bhphotovideo.com/c/product/1070031-REG/vanguard_vs_34_tabletop_tripod_metal_with.html

They are super cheap, super resistant and the varying leg angle makes them more useful for tricky surfaces or even for using your own chest as a support.

Well, neither do Joby...

Direct link | Posted on Jun 30, 2015 at 15:00 UTC
On Readers' Showcase: Raiatea Arcuri article (55 comments in total)
In reply to:

biza43: Some nice images, keep up the good work and inspiration.

That said, I would invite people to read this article here:

https://luminous-landscape.com/a-new-perspective-on-landscape-photography/

It makes some very valid points about "too much use" of wide angles in landscape photography. Quite often we include uninteresting and boring foregrounds in our photos, and then the interesting stuff shows up as small and distant.

Totally agreed.
And what makes annoys me even more are panoramic shots of mountains with sunlit tops and dramatic sky.

Direct link | Posted on Jun 29, 2015 at 19:44 UTC
In reply to:

TriezeA72: Give it a few days and a Chinese version will be available on cheapBay!..... for half the price

First version of PocketSkater is on for over a year now and so far no cheap chinese copy at all.

Direct link | Posted on Jun 24, 2015 at 06:47 UTC
In reply to:

misolo: 35mm-format image circle, 15mm focal length, 1:1 magnification, 12cm minimum focus distance measured from front element -- don't know much about macro but, just from simple geometry, unless there's enormous focus breathing involved surely something's wrong with these specs?

rrcad: as you can see on a sample image (link above), it's not enough ;)

Direct link | Posted on Jun 23, 2015 at 20:44 UTC
In reply to:

rrccad: Even as a non macro lens, having perspective shift is kind of a nice / big deal - the only other lens around this focal is the much more expensive 17mm TS-E.

On the other hand, Canon has twice as big shift distance (12 mm compared to 6 mm) in any direction (compared to only up/down ofr Laowa)

Direct link | Posted on Jun 23, 2015 at 19:20 UTC
In reply to:

misolo: 35mm-format image circle, 15mm focal length, 1:1 magnification, 12cm minimum focus distance measured from front element -- don't know much about macro but, just from simple geometry, unless there's enormous focus breathing involved surely something's wrong with these specs?

It sounds good, but 6 mm shift is not much...

Direct link | Posted on Jun 23, 2015 at 19:17 UTC
On Opinion: Did Sony just do the impossible? article (1073 comments in total)
In reply to:

Urmas Tartes: Shutter shock, or lack thereof???

I am a bit surprised about "being over the Moon" regarding electronic first curtain shutter in A7R II. Canon had that technology already in 5D MII enabling to avoid almost all mechanical vibrations while shooting (shutter still closes mechanically). Others have played just catchup game here.

"Canon requires you to shoot in live view mode..."
A7R is constantly in Live View mode, Canon needs to push just one button to get there. No big difference.

Don't get me wrong - electronic first curtain shutter is a MUST feature in high megapixel cameras. Even better would be global electronic shutter - that would be really big deal whoever makes it first.

Well, Canon 70D with STM lenses focuses fine even in LV mode ;)

Direct link | Posted on Jun 22, 2015 at 19:32 UTC
On Opinion: Did Sony just do the impossible? article (1073 comments in total)

Basic rule of journalism: whenever there is a question in the title, the automatic answer is "no" :)

Direct link | Posted on Jun 22, 2015 at 19:31 UTC as 219th comment | 1 reply
On #1 in France: Hands-on with DxO ONE article (220 comments in total)
In reply to:

Androole: Wow, it's way, way bigger than I thought it was. That sucks a lot of the appeal out of it.

Also, the Lightning Connector makes it obvious that it's only designed for iPhone, with no possibility of using Android. That makes it a definite pass.

Exactly my first thought: it's much bigger than it looked. It must be operated two-handed and I'm also little worried about lighting connector and it's ability to handle such a weight.

Direct link | Posted on Jun 18, 2015 at 13:50 UTC
Total: 58, showing: 1 – 20
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