Vasyl Tsvirkunov

Vasyl Tsvirkunov

Joined on Jun 6, 2000

Comments

Total: 32, showing: 1 – 20
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In reply to:

Vasyl Tsvirkunov: Interesting. B+W 110 has slight brownish cast, I never thought about it being near-IR pollution but it does make some sense. Would be really interesting to see how this one stacks against 110 after color correction.

Are you sure? https://www.schneideroptics.com/pdfs/filters/WorldOfFilters.pdf shows a different picture (page 19). It actually looks like 110 is about 10 time more transparent to IR than to the visible light. That said, the cast looks uniform and easily correctable - I would pretty much expect IR leak to brighten floral subjects and it is not happening. Next time I use 110 I will try combining it with CC1 or something like that, out of curiosity but I don't really think there is a real problem there.

Direct link | Posted on Nov 12, 2014 at 02:33 UTC

Interesting. B+W 110 has slight brownish cast, I never thought about it being near-IR pollution but it does make some sense. Would be really interesting to see how this one stacks against 110 after color correction.

Direct link | Posted on Nov 11, 2014 at 03:19 UTC as 9th comment | 4 replies
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Andreas M: Shooting film requires a certain discipline, born of limited frames and undeveloped images, something that is lacking in digital photography. Can't say I really miss that, but keeping a film factory open and producing does keep some options open.

I do miss getting a significantly higher ISO by buying a new roll of film rather than buying a new camera.

There is something to be said for that discipline. We used to have a photoclub at work and went on those "assignments" once in a while. One of the assignments was to pretend to use film - fix ISO, limit number of frames, could not discard any shots, extra points for using fixed focus, limited processing. Two things came from that - it was the most fun assignment, and the resulting photos were considerably better than usual.

Direct link | Posted on Oct 13, 2014 at 21:10 UTC
In reply to:

grafli: For 5 years research, this isn't much of a update to the original EOS 7D. Yes the Autofocus is very nice! But for me, thats's all. not really better IQ...

Indeed. There is one interesting improvement but it is likely to get unnoticed - the original 7D was a transitional camera: DIGIC5 was not available yet and DIGIC4 was a bit underpowered. So it used a unique dual DIGIC4 solution. Looks like two processors worked in vertical interleave setup introducing certain vertical component into the noise and causing vertical banding in processing. Not very noticeable in regular shots but ranging from annoying to intolerable in HDR. Thankfully, that kind of design is not very likely to happen again.

Direct link | Posted on Sep 23, 2014 at 06:48 UTC
On Rare Canon EF 1200mm f/5.6L USM goes on sale in UK article (218 comments in total)
In reply to:

Pedagydusz: Does the x2 EF TC work? If so, I am going to order one. I want it to use with my Panasonic GM-1- That way I will have an equivalent FL of 4800 mm, and the whole combo will remain lightweight! ;-)

Where's Metabones EF to m43 SpeedBooster adapter when you need it? $99K and no aperture control? I'll pass ;)

Direct link | Posted on Aug 15, 2014 at 22:36 UTC
On Travel tripods: Comparing 5 aluminum kits article (106 comments in total)
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Felix E Klee: For today's light weight compacts and system cameras, wouldn't it be possible to create an advanced tripod that just weighs about a pound / 0.5 kg, and that is extensible to a variable height of up to 5 foot / 1.5 m? No market?

Bilora used to make the Biloret, which comes close, and which can be had cheap. However its technology is roughly half a century old. I'm willing to pay up to 200 USD / EUR for a tripod matching the above specs. Of course light weight tripods are not great in wind, but it's not always windy.

Carbon is an incredible material. I used very thin carbon legs for a fun table tripod design: http://www.thingiverse.com/thing:363348

Second the Sirui T-025x recommendation. The combination of weight/collapsed size/quality is unbeatable at that price.

Direct link | Posted on Jul 20, 2014 at 21:05 UTC
On In Photos: Iceland captured in infrared article (70 comments in total)
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vroy: This is not IR. IR is black and white. What is warm is white. What is cold is dark. The horses on one of the photos have warm blood and should be white. On all those photos you see colours in place of different greys.

IR (or, rather, near infra red) has little to do with the temperature. You are thinking about thermal imaging. A lot of IR photographic techniques use a mixture of near infrared and parts of visible spectrum mapped to different (admittedly, false) colors.
IR light behaves quite differently when it comes to atmospheric effects often making it quite suitable for landscapes and cityscapes.

Direct link | Posted on Jun 8, 2014 at 05:37 UTC
On Windows XP is dead. Long live Windows XP 'Bliss' article (119 comments in total)
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mikeyL: I think it would be a nice image - if it was in focus. Always seemed blurry to me, even on top quality monitors...

It did look somewhat out of focus but it could be just a very aggressive compression. It could also be intentional - highly detailed background makes icons and particularly text labels much harder to read. As for top quality monitors - that image is what - 1024x768? In that case the better monitor you have the worse it will look.

Direct link | Posted on Apr 14, 2014 at 23:51 UTC
On Lensbaby releases 5.8mm F3.5 circular fisheye lens article (20 comments in total)
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ProfHankD: Hooray! I love fisheyes and the world could use another circular 185-degree choice, especially one with a modest price, really close focus, and good IQ.

"Lensbaby deliberately designed the internal lens barrel of the Circular Fisheye to be reflective" -- BOOO! HISS! This is a very bad idea if the reflections can ever intrude on the active image circle... which at least one of the sample shots (skiing) seems to show.

I will reserve my judgement until I see a sample or samples. There is only one circular fisheye lens for crop cameras out there (Sigma 4.5) and it is quite expensive for its purpose. The edge of the circle would always be of rather poor quality due to extreme distortions so some artistic effect there may actually be an improvement.
Edit: there are samples on the site. Not a full size yet but it does look interesting enough.

Direct link | Posted on Apr 12, 2014 at 07:28 UTC
In reply to:

DarylK: IMHO, for true "retakes" they should have stayed away from infrared...shoot color and convert to B&W or shoot in B&W natively for more meaningful direct comparision. It is stated that IR was used to be able to show more distant detail - I think the old B&W shots are more effective at this. Just my opinion.

I've done some experiments with IR and found that landscape b&w IR often looks very close to old photographs. Maybe not the same distribution of halftones but very similar combination of crispness and glow.
It is quite possible that the old b&w film was somewhat sensitive to near infrared so there may be some justification there but not necessarily as intended. I am not sure why they had to use color IR, it's just too distracting.

Direct link | Posted on Jan 28, 2014 at 02:36 UTC
In reply to:

Combatmedic870: We need Fuji's!!!

People were able to reverse engineer the process to large extent. As a matter of fact, I've been using one of these custom made profiles. The problem is that Adobe did not publish the spec, did not encourage the manufacturers to use it, and makes breaking changes on the regular basis. It is not necessarily only Adobe's fault, some initiative should come from the manufacturers.

Direct link | Posted on Dec 15, 2013 at 07:03 UTC
In reply to:

naththo: It is not hard to make your own profile by using sliders to compare to the JPEG colours straight out of your camera.

That would work if the color response was linear or at least regular. It is not. It may be close to that in the middle of gamut but the closer you get to the edge the more warped it may become.

Direct link | Posted on Dec 13, 2013 at 08:11 UTC
In reply to:

Combatmedic870: We need Fuji's!!!

What we need is an open API so every camera manufacturer can provide their own profiles with cameras. In principle, it is not anymore complex than dealing with printer/paper profiles. Simpler, actually.

Direct link | Posted on Dec 13, 2013 at 06:42 UTC

This finally fixed my favorite (not!) problem with rendering of blues (http://www.dpreview.com/forums/post/42354760).

Direct link | Posted on Dec 13, 2013 at 03:28 UTC as 8th comment
On What's new @ CES 2013 article (126 comments in total)
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AngryCorgi: "Polaroid surprised us at CES with semi-functional mockups of three new interchangeable lens cameras."

From what I read, the cameras themselves were entirely non-functional. The only thing that worked is the Android OS on one of them, but no indication that it was anything more than a plastic fake model with a cheap android phone pcb and screen glued in to look legit.

So, smoke and mirrors. I still want to hear Polaroid's justification for putting the sensor with the lens. So far the experience with every interchangeable lens system was that the lenses have much better longevity than the body. Constant sensor tech improvements were one of the main factors, especially paired with the slow pace of the mature high-end optics industry and the prices of good quality glass.

Direct link | Posted on Jan 12, 2013 at 10:50 UTC
On What's new @ CES 2013 article (126 comments in total)
In reply to:

justmeMN: The Canon PowerShot N reminds me of a Seinfeld quote:

"Sometimes the road less traveled is less traveled for a reason."

Well, somebody had to try that. Odd that it had to be Canon, this thing is more in Casio or Samsung line. There were a lot of complaints lately that Canon is falling behind and does not really innovate. They've heard the message but they still need to work on the understanding of it.

Direct link | Posted on Jan 12, 2013 at 10:34 UTC
On What's new @ CES 2013 article (126 comments in total)
In reply to:

j2l3m7: Sigma USB dock sounds very interesting.

Interesting, maybe. I don't like that it mentions "new lenses" only, would be nice if they cared for older ones as well. It also looks like it is only for a single mount which in case of Sigma does not make much sense - might as well do it through their cameras. Finally, with the size of FF lenses, why not just a micro USB port on the lens itself?

Direct link | Posted on Jan 12, 2013 at 10:23 UTC
In reply to:

malabraxis: I wonder what the cost will be for the circular polariser? Using a polariser on ultra-wide lenses is not always a good idea as the sky will look weirdly unbalanced, and I fail to understand the UV filter as most lenses do a pretty good job from their coating. Most camera's use built-in filters anyway. Anyway, how is this better than HDR sofware?
If you use filters a lot, then fine, but too expensive and cumbersom for the most of us.

Using polarizer on ultrawide (and even on wide) is generally a bad idea as the polarization angle would vary too much across the frame. This thing would be great for grad ND. Don't dismiss UV blockers either -- it is true that those are useless or even harmful in 90% of situations but if you go high in the mountains they may become a necessity. It all sounds like this system is a good match for landscape photography.

Direct link | Posted on Dec 6, 2012 at 22:38 UTC
In reply to:

Mark Roberts: Has anyone been ASKING for a middle ground, or is this just a push for another proprietary standard that Adobe can license?

Let's see if it ends up like TIFF - in the years past you could get Aldus TIFF, Kodak TIFF, Adobe TIFF, whoever TIFF... The format allowed to put pretty much anything in so no single app could open every TIFF file. DNG is a little better defined but it still allows a lot of leeway which may be abused by manufacturers. After that happens it is quite pointless -- you get the same proprietary data in a different container. Not even that different considering that DNG is largely a subset of TIFF. BTW, from what I can tell, Canon, Olympus, and Panasonic (probably others as well) RAW files are actually TIFFs -- Canon even left the "version number" field at 42. If you have Canon CR2 and ACDSee installed, try renaming one of .CR2 to .TIF and opening with ACDSee. The result is rather interesting.

Direct link | Posted on Oct 5, 2012 at 21:43 UTC
In reply to:

dengx: Somehow I don't think it is a good news.

One saving grace - the quality and depth of current versions are so high that it will take years before they become obsolete. Most likely the worst problem will be Photoshop compatibility. Well, I already have three different versions of Photoshop installed at the same time because of that.
There will be something equal or better in years -- maybe Topaz will turn from surreal effects towards more realistic and subtle ones, maybe onOne fills some gaps, maybe even something completely new.

Direct link | Posted on Sep 18, 2012 at 23:44 UTC
Total: 32, showing: 1 – 20
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