Henrik Herranen

Henrik Herranen

Lives in Finland Tampere, Finland
Works as a Digital Signal Processing Software Engineer, MSc
Joined on Oct 6, 2005
About me:

Plan: To baldly shoot what everyone has shot before.

Comments

Total: 137, showing: 1 – 20
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On Massive $33,500 2450mm f/8 NASA lens surfaces on eBay article (215 comments in total)
In reply to:

hotdog321: F8?! Don't they know we need a f/2.8 lens?

Kaktus: It is not a 1450 mm FF equivalent.
How would apparent focal length decrease (from the original 2450 mm) when you crop an image? Doesn't work that way when cropping a FF lens to crop cameras, and doesn't work that way when cropping a larger-than-FF lens to FF cameras.

Hmmh.. "Kaktus Kontrafactus"... Contra. Fact. Is this a troll account?

Direct link | Posted on Apr 29, 2015 at 04:33 UTC
On Massive $33,500 2450mm f/8 NASA lens surfaces on eBay article (215 comments in total)
In reply to:

nunatak: in comparison, $33,500 makes the Nikon Reflex-Nikkor C 1000mm f11 Mirror Lens on a Nikon V1~3 look like a 2700mm (35mm equiv.) bargain. :)

Kaktus: the discussion may have been had, and your frustration shows. Nevertheless, your numbers still are incorrect.

If we assume the 2450mm f/8 NASA lens has a crop factor of about 0.63 (36/57 mm, although this isn't entirely correct because this doesn't take full image circlesinto account), the FF equivalence would be to a 3900mm f/5 lens.

Think about it!
When a larger image circle (57x57 mm) is cropped to a smaller FF sensor (36x24 mm), the equivalent focal length for sure isn't going to go down. So there is no way you get 1400 mm from cropping a 2450 mm lens image.

Direct link | Posted on Apr 29, 2015 at 04:29 UTC
On Sony SLT-A77 II Review preview (483 comments in total)

To the good folks of DPreview:
Could you add sensor size to the "key specifications" part on Page 1 in your reviews? Quite honestly, as much as I try to follow all manufacturers' camera models, I cannot remember every camera's sensor size by heart, and I believe that's true for many other people, too. Now I had to wade to "SLT-A77 II vs. SLT-A77 key differences" at the end of the first page before getting the information.

Couldn't you just replace the first "key specification" line from:
- 24MP CMOS Sensor with gapless, offset microlenses
to
- 24MP APS-C (24x16 mm) CMOS Sensor with gapless, offset microlenses
and then do this for all new reviews?

It's not like it's a big difference. Plus, if sensor size isn't a key specification, I don't know what is.

Please?

Direct link | Posted on Apr 23, 2015 at 06:15 UTC as 76th comment
In reply to:

bakhtyar kurdi: For anyone wants to buy these kind of totally manual focus lenses, I recommend to buy only Nikon version whatever camera you have, you can then buy a cheap $7.00 adapter to convert it to Canon , If you are using Sony E mount, probably you already have a Canon to Sony E mount adapter, this way you have the lens for 3 systems with $7.00 extra, and you are not loosing any function, also if you change your system you don't stuck with your lens, resale price also will be higher on the Nikon version than any other mount.

Except that every adapter adds to lens mount tolerances and decreases image quality; probably more so with a cheap adapter. This was tested a few years ago by Roger Cicala of LensRentals fame.

Reference:
http://www.lensrentals.com/blog/2013/09/there-is-no-free-lunch-episode-763-lens-adapters

Direct link | Posted on Apr 18, 2015 at 07:16 UTC
On Fujifilm XF 16mm F1.4 moves from roadmap to retailers article (227 comments in total)
In reply to:

Neil-H: As soon as I saw the name "Fuji" I knew it was gonna be at least a grand.....

JaP: It cannot perform "better" than the FF f/1.4's. Whatever its other optical properties may be, its DoF capabilities are similar to a FF f/2 lens.

Direct link | Posted on Apr 16, 2015 at 06:07 UTC
On Lytro sheds jobs as it shifts focus to video article (506 comments in total)
In reply to:

bogdescu: Might it have dawned on them that merely postponing a decision (where to focus and what f-stop to choose) is not actually something desirable?

jtan: Why would anyone need to refocus a surveillance camera image, and why would you give up resolution for that feature? Better to have a camera at several MP pre-focussed to 3m - infinity if you want to recognize the perpetrator.

Direct link | Posted on Feb 27, 2015 at 15:20 UTC
On Lytro sheds jobs as it shifts focus to video article (506 comments in total)

Video of today is 4K / UHD, or in other words around eight megapixels. Lytro images show obvious digital artifacting even at 0.2 (zero point two) megapixels. Reference: pixelated out of focus areas between hand and background in http://www.dpreview.com/files/p/articles/1418225486/IMG_0331-ShallowDOF-520px.jpeg from article http://www.dpreview.com/articles/1418225486/lytro-introduces-focus-spread-feature

This technology doesn't work.

Direct link | Posted on Feb 26, 2015 at 02:18 UTC as 73rd comment | 5 replies
In reply to:

iShootWideOpen: For a nano second I considered saving $1800 and buying the Tamron over the Canon 11-24L. After seeing tests on digital-picture and lens rental I feel better about my move.

Quite so, Der Steppenwolf.

And in any case, I wouldn't directly compare a 15-30/2.8 IS against a 11-24/4. They are vastly different lenses with many non-overlapping applications.

The f/2.8 IS goes hand-held to many places the f/4 doesn't, and on the other hand the 11 mm does things where the 15 mm just isn't cut. Clear as day.

As the IQ of both lenses seems to be excellent even wide open, not to speak stopped down a notch or two, the choice should not be done with fanboy mentality, but based upon required applications.

But, of course, if you need to misread clearly written articles to "feel better about [your] move", so be it. But don't be surprised if we don't buy it.

Direct link | Posted on Feb 25, 2015 at 20:40 UTC
In reply to:

blakevanderbilt: http://www.lensrentals.com/blog/2015/02/just-the-lenses-tamron-15-30mm-f2-8

If their method of testing out these lenses is reliable, then what they LensRental is saying is that the Tamron 15-30/2,8 is definitely better than the Canon 16-35/4L, but no where is it close to the Nikon. I'll be getting the Nikon 14-24/2,8 Thanks

Yes Blake, it was quite obvious that you didn't read the article.

Direct link | Posted on Feb 25, 2015 at 20:34 UTC
In reply to:

blakevanderbilt: http://www.lensrentals.com/blog/2015/02/just-the-lenses-tamron-15-30mm-f2-8

If their method of testing out these lenses is reliable, then what they LensRental is saying is that the Tamron 15-30/2,8 is definitely better than the Canon 16-35/4L, but no where is it close to the Nikon. I'll be getting the Nikon 14-24/2,8 Thanks

Except that's not at all what Roger's article says or implies. At 23 mm, Tamron held quite well against Nikon, being even slightly better. At 14 mm (Nikon) vs 15 mm (Tamron), it's Nikon's turn to have a slight edge.

Of course, at 30 mm the Tamron is slightly worse than at shorter focal lengths, but as Nikon cannot even go there, that cannot be counted as a fault in the Tamron / Nikon debate.

All in all, it's pretty much a wash: both are excellent instruments. Except that the Tamron has image stabilization, a much larger focal length range, a significantly lower price, and according to at least Dustin Abbott, incredibly good flare resistance - something very important in an UWA lens. The Nikon is of course wider - and in UWA, every millimeter counts.

Reference:
http://dustinabbott.net/2015/02/breaking-image-tamron-15-30-vc/

Direct link | Posted on Feb 25, 2015 at 17:59 UTC
On New samples from the Sigma 24mm F1.4 DG HSM Art lens article (236 comments in total)
In reply to:

ragmanjin: I'd be curious to see how it compares to the equivalent Samyang, they've been getting some good reviews as well.

Der S: You forgot the venerable 14/2.8 from Samyang's FF lens list.

Direct link | Posted on Feb 20, 2015 at 07:33 UTC
On CP+ 2015: Canon shows off new EOS 5DS and 5DS R article (124 comments in total)
In reply to:

Francis Sawyer: Canon is so far out in the weeds, it's pathetic.

Still no intervalometers in their cameras (a simple, essentially free feature that every modern camera should have). Their lenses still have shitty servo rings instead of real mechanical focusing action.

They don't even have a reasonable 35mm lens. They have two overpriced boondoggles with IS systems in them. At 35mm? Really?

It's as if no one over there knows anything about photography OR video.

Troll troll troll your boat...

Direct link | Posted on Feb 15, 2015 at 14:47 UTC
On CP+ 2015: Canon shows off new EOS 5DS and 5DS R article (124 comments in total)
In reply to:

luxor2: "By far the biggest lines at this year's CP+ show in Yokohama are at the Canon booth, and they're made up almost entirely of people eager to see just two cameras - the new EOS 5DS and EOS 5DS R."

What is there to see that differs from the previous camera? The logo?

luxor2: Obviously the people in the queue know it. If you don't, I don't think any repeating will help you understand.

Direct link | Posted on Feb 15, 2015 at 14:46 UTC
On CP+ 2015: Canon shows off new EOS 5DS and 5DS R article (124 comments in total)
In reply to:

steve ohlhaber: The pricing is really getting nuts for canon. Bodies and lenses are crazy. If this shot 4k or at least 1080p 60, then I could justify it.

"This is a high-megapixel still camera. It is not a video camera."

Repeat until understood.

Direct link | Posted on Feb 15, 2015 at 14:44 UTC
On CP+ 2015: Canon shows off new EOS 5DS and 5DS R article (124 comments in total)
In reply to:

MarkByland: Sort of false representation taking 100 photographs, stitching them together, and presenting them as some thing that would come straight out of camera. Why not do side-by-side 1:1 series taken from a MkIII? Or, wait, a D810? Show us what you've got, not what can be done with major digital processing.

Also, does this 5Ds R come with a free, multiple terabyte, cloud based storage account?

Where did it say that Canon presented the images "as some thing that would come straight out of camera"? That's your assessment, not Canon's.

Along with your mindless "cloud based storage account" boo-hooing, I think you are just trolling.

Direct link | Posted on Feb 15, 2015 at 14:41 UTC
On Sigma goes wide with 24mm F1.4 DG HSM Art lens article (184 comments in total)

As an owner of the excuisite Sigma 50A, and as someone who has postponed his Canon 24/1.4L II purchase for quite a while in anticipation of this... yes, please!

Direct link | Posted on Feb 10, 2015 at 06:43 UTC as 50th comment
On Go wide! Hands-on with Canon's 11-24mm F4 L article (224 comments in total)
In reply to:

seawild: I am a Canon shooter but shoot the Nikkor 14-24mm with a Novoflex adapter. at f2.8 and almost $1,200 cheaper than this new Canon glass I feel it is the better choice. It is ridiculously wide enough for the landscape and astro photography I use it for. 11mm would simply be overkill. I'm sure we'll see some magic being made with it, looking forward to seeing but it won't be headed for my kit bag any time soon.

Jon: What12-24 lens were you going to adapt? The only 12-24 I know of is the Sigma and it's available in Canon mount.

Direct link | Posted on Feb 8, 2015 at 07:04 UTC
In reply to:

mpgxsvcd: When Canon speaks, everyone cringes.

-

Direct link | Posted on Feb 7, 2015 at 12:31 UTC
In reply to:

Michael S.: What a nonsense putting 50MP on an 36x24mm sensor.
There is no Canon lens that is capable to resolve those tiny pixels.

Michael S. You did not calculate correct.
While it is true the that 7D II pixels width is 4.1µm (22.4mm / 5472pixels = 4.1 µm/pixel), so is the case also for the 5DS (36mm / 8688 pixels = 4.1 µm/pixel).

As for your original claim that no Canon lens is able to resolve that, you are quite simply wrong, particularly near the center that is of most interest to those who are telephoto limited.

Direct link | Posted on Feb 7, 2015 at 12:26 UTC
On Canon introduces 11-24mm f/4L USM wide angle zoom article (51 comments in total)
In reply to:

audijam: WTF?!?!?! $3G?!?!?!?! are you @#$@#ing out of your mind? JPY tanked so why can't they make LESS profit on exchange gains.

oh....right....it's Canon.

Bitch bitch bitch moan moan moan blah blah blah.

Canon makes the world's widest rectilinear lens EVER, and makes it a ZOOM no less, then shows MTF charts that suggests it will be SPECTACULAR. Then 90% of the comments here goes bitch bitch bitch moan moan moan blah blah blah wah wah wah.

The trolls have truly taken over this site's comments. I'd be just as happy if the whole feature was removed; it is so badly misused by sad little people who concentrate on vomiting their bad mood on everyone.

Direct link | Posted on Feb 6, 2015 at 18:12 UTC
Total: 137, showing: 1 – 20
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