MayaTlab0

Lives in France France
Joined on Feb 27, 2011

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Total: 652, showing: 81 – 100
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In reply to:

ProfHankD: Interesting.

Minolta's method (subsequently used by Sony and Laowa) employs shaping of a tinted-glass element. Apodization coatings are surprisingly problematic: the coating has to be smoothly shaded at the scale of the wavelength of the light, otherwise you'll get diffraction artifacts. It looks to me like there is some diffraction artifacting for this Canon lens too (in the form of slight "structuring" of the diffuse edges of the out-of-focus point spread function -- OOF PSF)... but it seems to be at a level that would go unnoticed by most people.

However, Minolta's method demands that the lens design have virtually no vignetting -- which is very difficult. Canon's trick here is that their 85mm f/1.2 vignettes pretty heavily, but the pair of coatings essentially smooth the vignetted edges too. Clever.

The question is, how come this lens costs twice as much as the Sony STF 100mm and $1,150 more than Canon's EF 85mm f/1.2L II?

The Varisoft is able to modulate spherical aberration to modify the bokeh and doesn't have an apodisation filter. The effect may have some similarities with apodisation, but is not identical and there are also signifiant differences. This is an OK article on the subject, with examples from a Nikon DC lens, and also with an illustration on why Canon coats two lenses instead of just one : http://jtra.cz/stuff/essays/bokeh/index.html
One thing I don't like about apodised lenses or lenses with minimal SA is that the effect disappears quickly when stopping down. With a 85mm lens I'll spend a lot of time around f2.8-f4, where that Canon's apodisation isn't effective. I wish we'd see the return of lenses with variable SA or any other mean to modulate the background at various apertures, including f4-f5.6 - but in a modern, perhaps motorised package.

Link | Posted on Oct 25, 2019 at 07:58 UTC
On article Hands-on with Nikon's 58mm F0.95 'Noct' lens (316 comments in total)
In reply to:

sirhawkeye64: At $8k I suspect this will have a very very very small target market. i'm sure it's a great lens, but it's huge (compared to some other Z glass--yes I know this one is f0.95) and absurdly expensive. I even cringe at $3000 lenses. The only people I could see getting this would be ones where the company they work for is paying for it, or they're making a six-figure income from their photography....

Maybe Nikon will start bundling this with a Z6... buy the lens and we'll throw in a free camera body.

Given the difference in point light source, scene, exposure, processing and what have you I think that it's a tremendously bad idea to compare the Nikon's astro shot sample with Lenstip's "coma" test.

Link | Posted on Oct 12, 2019 at 18:28 UTC
On article Hands-on with Nikon's 58mm F0.95 'Noct' lens (316 comments in total)
In reply to:

AstroStan: Star fields are a most rigorous test for a lens because the stars are point sources at virtual infinity so all kinds of aberrations become evident. The sample image reveals significant off-axis aberrations via gull wings, linear smears and so on. These defects are largely imperceptible for most day-time photography.

Agreed, it's not nonexistent as the marketing material would like you to believe, but is there a better uber-fast 50 or so around there ? Also it's unclear if and by how much the stars are clipped and what the lens' vignetting performance is.

Link | Posted on Oct 10, 2019 at 16:58 UTC
In reply to:

joenj: Interesting from a point of view of "What is technically possible". But unimpressive from an engineering point of view: One gets only 1/2 stop improvement for double the weight and three times the price (compare to RF 50 1.2 from Canon).

One word : vignetting. This is one of the most important things to look for with these fast lenses. It could be that one of the reasons the 50mm RF 1.2 manages to be fairly compact-ish, or at least not giganormous, is that Canon basically gave up on trying to minimise vignetting, to the point where the corners can't see the full aperture of the lens in both axis and you don't really get f1.2 worth of DOF for a good chunk of the frame at common shooting distances. It remains to be seen how well this 58mm handles vignetting but if it manages to minimise it to the point that it's no worse at f0.95 than a typical 50mm f1.4 lens at f1.4 while having the performance that the first shot in the gallery shows, it may provide something we've never had before I believe. I'll leave it to you to determine whether that's worth it or not :D.
Nikon's upcoming f1.2 50mm looks larger than Canon's, but it's also reasonable to expect a different approach to vignetting, AF design, focus breathing, etc.

Link | Posted on Oct 10, 2019 at 16:47 UTC
On article Nikon Z50 review (2012 comments in total)
In reply to:

NexLupus: @Carey Rose
Why do you guys continue to insist that the Z50 has crop 4K?
Every other hands on review says that it doesn't.
Nikon's own literature says that it doesn't.

Either Nikon and every other review site has gotten it wrong or you guys are wrong and have not corrected even though you have had numerous posts throughout the various articles attempting to get clarification.

Please let us know, as the 4K video is a key factor for this camera, and someone is misinformed (DPREVIEW or everyone else) and giving all the wrong information!

It was barely wake up time on the west coast when you posted that comment, so perhaps let them sleep a little, have a decent breakfast, and a latte in a mermaid branded cardboard cup beforehand, IDK ? Perhaps I'm wrong but it doesn't seem to me like a dead or alive situation that would justify the existence of a code red crisis situation room available 24/7 at DP's HQs.

Link | Posted on Oct 10, 2019 at 14:55 UTC
On article Nikon Z50 review (2012 comments in total)
In reply to:

SpacemanUA: My local Nikon website also says that there is no crop in video.
And for those who asking about FTZ adapter kit - there are such kits: Z50+16-50+FTZ or Z50+FTZ

Weird : I've read it as well on Photolari, Photgraphyblog, etc... and it's also in this video from Nikon europe : https://youtu.be/mh8Jk3rW4qg?t=26

Link | Posted on Oct 10, 2019 at 12:04 UTC
On article Nikon Z50 review (2012 comments in total)
In reply to:

SpacemanUA: My local Nikon website also says that there is no crop in video.
And for those who asking about FTZ adapter kit - there are such kits: Z50+16-50+FTZ or Z50+FTZ

Same here on two French websites, no crop according to them. DPreview has actually handled the camera though, so unless the firmware is so preliminary that no crop 4K isn't available, which would be a bit weird for a November release, I'd rather bet on poor coordination on Nikon's part than anything else.

Link | Posted on Oct 10, 2019 at 11:23 UTC
On article Nikon Z50 review (2012 comments in total)
In reply to:

Deliverator: No joystick and no ability to use the touchscreen so select AF points while using the EVF is problematic. Moving through all those AF points is going to be slow going with a D-Pad. Otherwise, it looks like a great handling APS-C camera.

I'm also flabbergasted that the tracking UI hasn't been improved over the Z6/Z7 and that the latter have yet to receive a firmware update to fix that problem (which given the reviews should have landed near the top of Nikon's priority list of things to fix).

Link | Posted on Oct 10, 2019 at 11:19 UTC
In reply to:

cdembrey: The Leica Noctilux-M 50mm f/0.95 ASPH sells for $11,295.00. So Nikon's price $7996.95 sounds like a bargain.

I'm not sure that Leica's Noctiluxes are corrected well enough for field dependent aberrations to be that soft in the corners. We don't know what Nikon's performance targets are with this lens, but I'd be a little bit disappointed if they didn't use the unrestrained size, weight and price to provide significantly better correction of field dependent aberrations and with lower vignetting to boot. Perhaps this would remain compatible with using on axis aberrations to enhance background transitions.

Link | Posted on Oct 8, 2019 at 18:39 UTC
In reply to:

cdembrey: The Leica Noctilux-M 50mm f/0.95 ASPH sells for $11,295.00. So Nikon's price $7996.95 sounds like a bargain.

I don't know about other very fast 50s but the Leica Noctiluxes aren't exceptionally well corrected wide open and have tons of vignetting. So perhaps here Nikon's aim was to produce a super fast 50 with low vignetting and solid wide open correction, size be damned.

Link | Posted on Oct 8, 2019 at 18:13 UTC
On article When fast-ish is fast enough: in praise of F1.8 lenses (527 comments in total)
In reply to:

phouphou: Great read!
I think the new Sigma 45mmf2.8 shows the way. Compact and geat bokeh. Fast appertures should serve a purpose, light gathering has become less important. So when isolating a subject it should be done esthetically. I wish more manufacturers start doing what Sigma did!

That will only happen if lens reviews successfully explain, illustrate and put in context what lenses like the Sigma 45 bring to the table. Given the ones I've read so far I don't see much progress since the days of the Nikon 58. I found Dustin's review to be a cut much above the others : https://youtu.be/zWhwNoo70qI

Link | Posted on Oct 8, 2019 at 09:19 UTC
On article When fast-ish is fast enough: in praise of F1.8 lenses (527 comments in total)
In reply to:

samhain: I think a point that would’ve been worth making is the change of lens design- where fast lenses that focused on rendering, bokeh, center sharpness etc were much smaller than all these new lenses that focus on corner to corner sharpness, optical perfection, etc.

I much prefer the former.

There is no necessary dichotomy between focusing on "rendering, bokeh, centre sharpness", and focusing on "corner to corner sharpness". The correction of field dependent aberrations can also very positively impact bokeh in the outer parts of the frame, and doesn't necessarily preclude the modulation of on axis aberrations to enhance some aspects of bokeh performance. In Cameralabs' comparison between the Nikon 50 S and 50 1.4G it's pretty obvious which one is considerably more nervous than the other past the APSC circle or so : https://www.cameralabs.com/nikon-z-50mm-f1-8s-review/2/
Same applies, for example, to the 50mm 1.2 RF vs. EF.

Link | Posted on Oct 7, 2019 at 19:54 UTC
On article When fast-ish is fast enough: in praise of F1.8 lenses (527 comments in total)
In reply to:

moinmiami: I'm hoping Nikon introduces f2.8 S series lenses. I would like some primes that are smaller, (maybe lighter/less expensive) so my already relatively small z6 stays small with lens attached. The sensor is so good, I could shoot 3200 or 6400 all day and night and still have really nice images to work with. Will nikon do it. I make sacrifices to the camera gods daily ;-)

I don't know if they should be "S" or not, but I too would welcome a f2.8 lineup if it's designed in the same spirit as the Sigma 45, but without the fancy exterior and cheaper.

Link | Posted on Oct 7, 2019 at 15:17 UTC
On article When fast-ish is fast enough: in praise of F1.8 lenses (527 comments in total)

Another increasingly significant advantage for slower lenses : they can be designed to have a lot more on axis aberrations wide open, without being poorly received, than an equivalent, modern fast lens closed down at the same aperture. The modulation of these aberrations may help to enhance bokeh. The Sigma 45mm is a poster child for this approach to finding USPs to slower lenses beyond just a question of price / size / weight.

Link | Posted on Oct 7, 2019 at 15:12 UTC as 124th comment
In reply to:

entoman: "the UK will definitely, very likely, maybe have left the EU by the time Jan 1 rolls around"

I'd really really like to think our friend Boris will be defeated and that we'll remain in the EU, but unfortunately I think people are so sick and tired of the whole fiasco that we'll exit before the end of the year. I just hope I'm wrong.

If that is your understanding of what sovereignty means (and you're just wrong), then may I invite the UK to exit basically at least half of the following hundreds of international conventions ? https://en.wikipedia.org/wiki/Category:Treaties_of_the_United_Kingdom
Does ECHR ring a bell ? Too bad, you're not leaving that.

Link | Posted on Oct 3, 2019 at 18:37 UTC
In reply to:

entoman: "the UK will definitely, very likely, maybe have left the EU by the time Jan 1 rolls around"

I'd really really like to think our friend Boris will be defeated and that we'll remain in the EU, but unfortunately I think people are so sick and tired of the whole fiasco that we'll exit before the end of the year. I just hope I'm wrong.

Those pesky Normans ! Free England from the tyranny of William the oppressor ! #beheadnotdecapitate #cowpiesnotbeefpies #burnthetapestry #notmyking #EadricthewildFTW

Link | Posted on Oct 3, 2019 at 17:58 UTC
On article Nikon Z 85mm F1.8 S sample gallery (257 comments in total)
In reply to:

Prairie Pal: It would have been nice to have a second shooter with a DSLR and the 85 AFS 1.8. Shooting identical images and cameras set up relatively similar to each other. Real Life comparisons to give us references to gauge the degree of improvement between "old system to new generation".

Cameralabs' review of the 85 S directly compares it with the G : https://www.cameralabs.com/nikon-z-85mm-f1-8-s-review/2/
Contrary to the other lenses it's compared with the shots taken with the S and G were taken in the same shooting session at a similar time, that makes the comparison even more reliable in my opinion.
I think that the difference in terms of chromatic aberrations is big enough that it can quite safely be stated that while not perfect the S is a major improvement over previous 85s from Nikon in that regard.

Link | Posted on Sep 27, 2019 at 10:02 UTC
On article Nikon Z 85mm F1.8 S sample gallery (257 comments in total)
In reply to:

(unknown member): I compared it to my Sigma 85/1.4 Art. At the same aperture, the Nikkor often shows a more nervous bokeh. What I also dislike very much: if the AF is off and I enlarge LV to correct it manually, there's a lag between turning the focusring and the stepping motor effectively waking up. In dark conditions the Z 7 struggles with AF. Might be better with the Z 6, but the struggling starts at EV values I'm still able to focus the Art.

It is rather compact and rather sharp, but I'm not blown away. I was expecting more at this price and I also would have appreciated a lens display - the Z system apparently doens't measure or approximate distance.

Brillant :D ! Thanks a lot. Will look at it tomorrow.

Link | Posted on Sep 26, 2019 at 22:58 UTC
On article Nikon Z 85mm F1.8 S sample gallery (257 comments in total)
In reply to:

armandino: While the Canon R lenses look as sexy and impressive as they can be, I am far more fond of the 1.8 compact lenses for taking around all the time, if they are up for the task. No to mention the huge cost saving. Well done Nikon.

I find the 50 S' overall performance vs. price just as "special" as any f1.2 lens released lately. I fail to find a 50mm with this degree of correction without having to spend a lot, lot more.
Also it wouldn't be too hard to demonstrate how a lens like the Sigma 45 can provide a look at f2.8 that very few if not no other 45-50mm lens can provide (the combination of a truckload of spherical aberration and pretty strong correction of CA and field dependent aberrations is very rare).
So IMO f number =/= "something special".
But I certainly hope that Nikon's 1.2 lineup will live up to that qualifier (in the case of the 50mm, low vignetting would already be enough to make it special).

Link | Posted on Sep 26, 2019 at 13:57 UTC
On article Nikon Z 85mm F1.8 S sample gallery (257 comments in total)
In reply to:

(unknown member): I compared it to my Sigma 85/1.4 Art. At the same aperture, the Nikkor often shows a more nervous bokeh. What I also dislike very much: if the AF is off and I enlarge LV to correct it manually, there's a lag between turning the focusring and the stepping motor effectively waking up. In dark conditions the Z 7 struggles with AF. Might be better with the Z 6, but the struggling starts at EV values I'm still able to focus the Art.

It is rather compact and rather sharp, but I'm not blown away. I was expecting more at this price and I also would have appreciated a lens display - the Z system apparently doens't measure or approximate distance.

Bokeh ! The Sigma is a lens I don't own (and don't intend to) but have an easy access to. It's also widely available so a good reference point.
But to be honest given the design philosophy of most current, modern 85mm lenses other than the rather obvious such as vignetting and LoCA I think that I'd find it difficult to form an opinion. You could show me a hundred samples of the Nikon 85mm 1.8 S and the Sony 85mm 1.8 FE and I would have no idea exactly how on axis aberrations are used to modulate OOF areas in the transition zone without direct comparison, and even still I'm not sure.

Link | Posted on Sep 26, 2019 at 07:58 UTC
Total: 652, showing: 81 – 100
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