noirdesir

Lives in Switzerland Switzerland
Works as a Engineer
Joined on Nov 4, 2006

Comments

Total: 739, showing: 21 – 40
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In reply to:

VisualFX: Can we just get OOC JPGs and quit with the "edited to taste" photos?

I strongly disagree with the idea that most sample images should be out-of-camera JPEGs. Tweaking camera settings is a crude way to adjust images that suffers from horrible feedback lag (if you assess the adjustments on a computer) or from very poor viewing conditions (camera LCD). Moreover, when you post a limited number of images, every image most likely has been individually adjusted. And that is all before considering that computer-based raw converters still produce a better image quality than the in-camera ones.

Link | Posted on Mar 10, 2017 at 17:03 UTC
On article Lightroom Mobile update brings Raw HDR capture mode (59 comments in total)
In reply to:

melgross: This works pretty well on my iPhone 7+. But it still takes time to process, and if you click on the HDR box, it will tell you it's processing the image, which can take several minutes. You can take more than one HDR though it's processing the previous one.

But, while it does a very good job here, it's not perfect. The tutorial makes the point that noise in darker areas is minimized when compared to a regular DNG shot when bringing up the shadow areas, and they're right, it does, by a fair amount, which is a good improvement. But, these are still smartphone cameras, folks, and noise is always going to be an issue in dark areas.

Nevertheless, this is a pretty good upgrade. The app is more sophisticated than you would expect.

You'd need to fix the phone (eg, on something like a tripod) and have a photo-taking app that stays at base ISO and selects a longer shutter speed to get good indoor image quality.

Link | Posted on Mar 8, 2017 at 21:34 UTC
On article Lightroom Mobile update brings Raw HDR capture mode (59 comments in total)
In reply to:

noirdesir: I'm pretty sure to do alignment and ghosting correction, you would need a de-mosaiced image, meaning those DNG produced by this HDR process will be linear DNGs.

I am pretty sure alignment is not done in pixel increments and includes correction for slight rotation and tilting, all meaning each image is projected on a new canvass and re-interpolated on it. And ghosting correction means cutting or shifting a (moving) object with one colour and/or brightness from a differently coloured background. Doing that on a Bayer pattern, in particular if the movement is not perfectly directed along the grid again requires re-interpolation.

Do you know of any software/application where Bayer data is re-interpolated to create new Bayer data with different grid? And I am not talking about de-mosaicing Bayer data, then re-interpolating the bitmap data and finally turning them back into Bayer data.

Link | Posted on Mar 8, 2017 at 11:13 UTC
On article Lightroom Mobile update brings Raw HDR capture mode (59 comments in total)

I'm pretty sure to do alignment and ghosting correction, you would need a de-mosaiced image, meaning those DNG produced by this HDR process will be linear DNGs.

Link | Posted on Mar 7, 2017 at 13:25 UTC as 2nd comment | 2 replies
On article Lightroom Mobile update brings Raw HDR capture mode (59 comments in total)
In reply to:

melgross: This works pretty well on my iPhone 7+. But it still takes time to process, and if you click on the HDR box, it will tell you it's processing the image, which can take several minutes. You can take more than one HDR though it's processing the previous one.

But, while it does a very good job here, it's not perfect. The tutorial makes the point that noise in darker areas is minimized when compared to a regular DNG shot when bringing up the shadow areas, and they're right, it does, by a fair amount, which is a good improvement. But, these are still smartphone cameras, folks, and noise is always going to be an issue in dark areas.

Nevertheless, this is a pretty good upgrade. The app is more sophisticated than you would expect.

In principle, there don't have to be any 'dark areas' when you do HDR with multiple exposures. If the longest exposure (ie, the one that provides the data for the darkest parts of the final image) is long enough to put a matte black surface just, eg, two stops below saturation of the sensor, you can get remarkable low noise. Of course, to map a scene with maybe 16 EV dynamic range, you'd then need eight exposures (and possibly more) which makes alignment and ghosting a bigger problem.

Link | Posted on Mar 7, 2017 at 13:23 UTC
In reply to:

LFPCPH: In the text above the 30mm 3.5 is listed under "Existing lenses". As far as I know it is not yet on the market.

Lloyd Chambers has been testing his retail copy of the 30 mm f/3.5 for over a week now. B&H lists it as backordered (and not as a new item, shipping soon).

Link | Posted on Mar 1, 2017 at 15:56 UTC

Looking at the lens speeds I wonder if XCD lenses are a bit restricted in regard to maximum f-stop by the lens shutter.

Link | Posted on Feb 28, 2017 at 23:28 UTC as 14th comment | 5 replies
In reply to:

noirdesir: Does it come with a magnifying glass so you can really enjoy the 800 dpi screen?

Printing needs significantly higher DPIs because they need dithering to create brightness and colour graduations. They can vary the amount of ink/pigment and have twice or three times as many ink colours as displays but that is not enough to get something like 8-bit per colour channel that almost all colour displays can provide per pixel without breaking a sweat.

Link | Posted on Feb 27, 2017 at 14:28 UTC

Does it come with a magnifying glass so you can really enjoy the 800 dpi screen?

Link | Posted on Feb 27, 2017 at 13:48 UTC as 19th comment | 3 replies
In reply to:

noirdesir: I know the case design shouldn't be too important but that focussing ring pattern really feels like these lenses were produced in the 1960s or 70s.

I actually didn't mean this as a compliment.

Link | Posted on Feb 26, 2017 at 00:01 UTC
On article Leica SL Review (1079 comments in total)
In reply to:

Nixyz: Let's wait for the panasonic version.

I don't know why you keep calling the Sigma 85mm f/1.4 EX DG HSM the 'old ART'. If you want to refer to it by a short moniker, probably best to call it the 85 mm EX.

Link | Posted on Feb 25, 2017 at 01:35 UTC
On article CP+ 2017: Ricoh teases upcoming D FA* 50mm F1.4 (95 comments in total)

According to DPreview there is only one other FA* lens: 70-200 mm f/2.8.

Link | Posted on Feb 24, 2017 at 04:12 UTC as 23rd comment | 1 reply

I know the case design shouldn't be too important but that focussing ring pattern really feels like these lenses were produced in the 1960s or 70s.

Link | Posted on Feb 24, 2017 at 04:09 UTC as 4th comment | 4 replies
On article Leica SL Review (1079 comments in total)
In reply to:

zilver: Spot on review. I had the SL for a while and found the good and bad points you mentioned spookingly exact, glad to continue to see detailed and honest reviews on DPreview.

Featuring (Editors' pick) a comment that compliments the author(s) findings is maybe a tiny bit too self-referential.

Link | Posted on Feb 24, 2017 at 01:44 UTC
On article Leica SL Review (1079 comments in total)
In reply to:

Nixyz: Let's wait for the panasonic version.

Testing Leica lenses in a way that allows a fair comparison with other lenses (which would ideally mean on the same camera) is made difficult by the fact that M-lenses need the special microlenses of the M bodies to really shine.

But LensRentals has done a comparison of several Leica, Zeiss and Sigma 50 mm lenses on an optical bench which really puts all lenses into a fair fight. The best Leicas (f/2 APO, f/1.4) test a bit better than the Sigma Art and the Zeiss Otus (note the much lower astigmatism of the Art and the Otus and read the fine print) but the non-APO Summicron ranks below those two. Leica might have the edge here, but difference is pretty small: https://www.lensrentals.com/blog/2014/06/comparing-rangefinder-and-slr-50mm-lenses-version-0-7/

And if you look Canon and Nikon exotics (fast long tele lenses), most of them are considered up there with Leica glass as well. And some recent Nikon lenses like the 105 mm f/1.4 also can match Leica quality without breaking a sweat.

Link | Posted on Feb 24, 2017 at 01:20 UTC
On article Leica SL Review (1079 comments in total)
In reply to:

Nixyz: Let's wait for the panasonic version.

I know that there is no clear evidence that Panasonic helped Leica with the SL on the sensor and/or electronics and/or image processing including video side. But that was not my argument. My arguments simply were that IF Leica got help from another camera company (they clearly didn't design the sensor or the main electronic components, those are bought from third-parties, some which could also be camera companies) and IF that camera company was Panasonic (without any specific knowledge about the SL situation certainly a possibility), there is essentially no chance of Panasonic releasing their 'version' of the SL (because of all the reasons listed in my previous posts).

I thought all of this was implicitly clear.

Link | Posted on Feb 24, 2017 at 00:53 UTC
On article Leica SL Review (1079 comments in total)
In reply to:

Nixyz: Let's wait for the panasonic version.

PanaLeicas aren't made in Europe because they essentially Panasonic camera with a different badge. The SL indeed is made in Europe because it is a Leica design (with a lot of help on the electronics from Panasonic most likely). Just because Panasonic helped with the electronics doesn't mean part of the agreement was that Panasonic can release its own version. There will never be a Panasonic M or S either. Heck, there never was a Panasonic version of any of the X models.

The Leica lenses are part of the Leica cachet and thus being built to use M lenses is part of it as well. I don't think the majority of Leica lenses are better than the best from Zeiss, Nikon, Canon and Sigma. Maybe there is more consistency in style. Maybe their general style has some qualities that are not available elsewhere.

Link | Posted on Feb 23, 2017 at 22:05 UTC
On article Leica SL Review (1079 comments in total)
In reply to:

Nixyz: Let's wait for the panasonic version.

The price of Panasonic's version of the PanaLeicas is not defined by being 3/4 of the Leica version price. It is defined by the price of other similar cameras from other Japanese brands (and the price of similar Panasonic cameras), ie, it is defined by the market for compact cameras with those features and Panasonic's production and R&D costs. The price of the Leica versions might be seen as about a 33% increase, it might also be seen as $200 to $300 surcharge.

A Panasonic version of the Leica SL would have to compete with the Sony A7 series (and also the other FF DSLRs). Meaning, it would need to be in the $2000 to $3500 range. The Leica SL only sells at its current price because of the Leica cachet, which is part brand, part lens quality, but also part uniqueness (offering something other FF cameras don't, eg, the EVF, being able to use Leica lenses, design, control layout). A Panasonic version would remove all but the brand aspect from the Leica SL's appeal.

Link | Posted on Feb 23, 2017 at 19:50 UTC
On article Leica SL Review (1079 comments in total)

Note that the four next SL lenses to be released in 2017 are all slower and more compact (three f/2 primes and a f/3.5-4.5 wide-angle zoom), partly based on feedback from users. It might also be worth mentioning that their lens roadmap has five additional SL lenses for 2018 pencilled in (getting up to a total of 12 lenses).
http://www.reddotforum.com/content/2016/09/setting-a-new-standard-with-leica-sl-lenses-a-discussion-with-peter-karbe-at-photokina-2016/

Link | Posted on Feb 23, 2017 at 15:20 UTC as 68th comment
On article Leica SL Review (1079 comments in total)
In reply to:

Edmond Leung: In film era, both Leica lenses and cameras were perfect products.
In digital era, Leica is only excellence in optics.
May be Leica should learn more from ARRI AG how to change the business model.

The Nikon 105 mm f/1.4 also rivals very good Zeiss lenses, have a look at this lens test: http://www.photozone.de/nikon_ff/998-nikkorafs10514ff?start=1

Link | Posted on Feb 23, 2017 at 15:17 UTC
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