Summi Luchs

Summi Luchs

Joined on Nov 9, 2012

Comments

Total: 87, showing: 1 – 20
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In reply to:

AbrasiveReducer: True, Voigtlander is one of the oldest names in photography, but as you (presumably) know Cosina, maker of current Voigtlander has no connection with the Voigtlander company.

Reminds me of when Kyocera celebrated the 50th anniversary of the Contax, a name they had purchased. They had banners and posters with a crest, lapel pins, the whole deal. Another case where a name was used to convey a legacy which did not exist.

Given that most people have never heard of Voigtlander until recently, I wonder what was wrong with "Cosina"?

Yes, there's nothing wrong with Cosina's products. I had some Zeiss and some Voigtländer branded M-mount lenses and they all were of high optical and mechanical quality. Some of the Voigts are made for "vintage look" - a matter of taste - nothing to win competitions on sharpness or low aberrations. This should not mislead to the opinion, that all Cosina lenses are 2nd tier.

Direct link | Posted on May 5, 2015 at 20:55 UTC
In reply to:

Summi Luchs: $309 seems steep for the adapter. Doesn't it work with any Leica M to E mount adapter ?

Thanks, Samuel. The Voigt adaptor seems to improve the close-focus capabilities of any M-mount lens. Their lens formula, however, is not calculated for closer than rangefinder minimum distances. Did you observe much performance loss using the Zeiss lenses closer than 0,7 meters ?

Direct link | Posted on May 5, 2015 at 20:41 UTC

$309 seems steep for the adapter. Doesn't it work with any Leica M to E mount adapter ?

Direct link | Posted on May 5, 2015 at 20:19 UTC as 2nd comment | 2 replies
On Nikon 1 J5: What you need to know article (493 comments in total)

Yes Nikon, it would have been better to omit the ridiculous 15fps 4K mode. The camera has decent 1080p specs, so this nonsense is absolutely unnecessary.

Otherwise the camera seems to be a big step towards the right direction.The BSI sensor adresses the biggest disadvantage of the 1 system (noise / DR). Tests will show if that move was successful.

I don't understand much of the bashing here. The Nikon 1 system offers really small and capable lenses and one of the best AF systems in the mirrorless world. If the new sensor is good and they manage to bring out a V-model (with EVF) using the new sensor I will buy one.

Direct link | Posted on Apr 2, 2015 at 07:24 UTC as 107th comment | 2 replies
On DPReview Recommends: Selfie-Sticks article (137 comments in total)
In reply to:

Xoom: I thought this was a April Fools joke because this has apparently gone viral today...
https://www.youtube.com/watch?v=Dw72zFX2rsk

I thought too, it was an April Fool, but you can order at least the Rollei at Amazon.

Direct link | Posted on Apr 1, 2015 at 17:32 UTC

What about the coating (compromising the durability of the glass itself) ?
If the material has a transparency of 99.9%, as said, there ist only 0.1% reflection (an attenuation of around 10 F-stops) my guess would be they don't need coatings. OTOH they write of 'superior coatings' in their press release. Then I ask what's the point of extremely durable glass, when the coating gets scratched.

Direct link | Posted on Mar 18, 2015 at 12:51 UTC as 14th comment | 1 reply
In reply to:

Fogsprig: Epson R-D you again?

@le-alain: Unfortunately the a7 sensor does not work very well with Leica M and Zeiss ZM wideangle lenses. The CMOSIS sensors will do (Leica uses CMOSIS). Let us wait and see if the 'electronic rangefinder' will be a real alternatove to an optical RF.

Direct link | Posted on Feb 25, 2015 at 14:53 UTC
In reply to:

DVT80111: Sony FE mount would be nice.

Don't think many A7 users want to carry a 1100grams heavy lens. So I guess Tamron will never produce a FE version.

Direct link | Posted on Jan 24, 2015 at 20:16 UTC
On Fujifilm announces X-A2 with selfie-friendly LCD article (132 comments in total)

Do selfie-shooters still use cameras ?

Direct link | Posted on Jan 15, 2015 at 09:52 UTC as 32nd comment | 2 replies
On Hands-on with Nikon's new D5500 article (288 comments in total)
In reply to:

agaoo: Nikon was my favourite camera but I'm no longer impressed by it's new cameras. Mirrorless cameras with 4K video, weather-sealed body, sexy design and even technology advanced functionality and durability explain Nikon is still in the past. Good luck Nikon :-)

What do you expect from an entry-level DSLR ? At its price point the D5300 was a very good camera.So it was clear that its successor would come with minor improvements only. As long as sensor technology will not reach a new breakthrough, most improvements in DSLRs will be minor. 4K enabled mirrorless like the Pana GH4 cost much more then Nikon's 5xxx series. Samsungs NX1, Fuji T1 etc. maybe more advanced but niether are entry level cameras. So I find the 5500 a very fair offering.

Direct link | Posted on Jan 6, 2015 at 10:27 UTC
On BPG image format aims to replace JPEGs article (205 comments in total)
In reply to:

photolando: I've been shooting jpegs most of my pro career. I have never once had a problem with "jpeg artifacts". I've sold 24"x30" and have seen larger made from jpegs. They look fantastic. And yes, I shoot raw as well if I feel it is needed so lets not start that stupid amateur argument.

Maybe this is aimed at pixel peepers because I've yet to hear anyone really complain all that much about the look of a jpeg image. Ever!

@Lambert: I totally agree, but that's what I said. The M9 renders very good DNG files, and by PS, LR or Capture One you can get very good JPG from it. But the in-camera generated JPG files are at least one quality level below.

Direct link | Posted on Dec 16, 2014 at 19:19 UTC
On BPG image format aims to replace JPEGs article (205 comments in total)
In reply to:

photolando: I've been shooting jpegs most of my pro career. I have never once had a problem with "jpeg artifacts". I've sold 24"x30" and have seen larger made from jpegs. They look fantastic. And yes, I shoot raw as well if I feel it is needed so lets not start that stupid amateur argument.

Maybe this is aimed at pixel peepers because I've yet to hear anyone really complain all that much about the look of a jpeg image. Ever!

Then you are lucky to have a camera with a good jpeg engine
There are quite a few cameras out that show lots of artifacts or other problems leading to sub-par image quality. Examples are the Leica M9 (lousy jpg but very good dng output), diverse Sony cameras (artifacts), Panasonic GX7 (too aggressive noise reduction at higher ISO). So some people see these artifacts in their images. I assume, you don't use one of these cameras for your business.
But I agree so far, that these problems do not lie in the jpeg format itself. They are caused by the in-camera processing used by their manufacturer.

Direct link | Posted on Dec 16, 2014 at 12:12 UTC
On Have your say in our 2014 Readers' Polls article (64 comments in total)
In reply to:

Kekal B Hollow: sigma dp2Q is the best camera of all time...nothing beats it, no D810, no 645Z, no NX1, no phase one, sigma is the best camera ever made

I assume, this post is a joke.

Direct link | Posted on Dec 16, 2014 at 11:40 UTC
In reply to:

Summi Luchs: My guess is that they will use the sensor-shift to de-Bayer the image. They can move the red, green and blue pixels between the exposures so, that they get a full RGB sample for every pixel (like a Foveon sensor). This would not give us 'true' 40MP resolution, it is simply the same calculus of 'equivalence' Sigma uses for its cameras. (Sigma uses a factor of three, Oly gets a lower factor of equivalence, as the Bayer sensor is not RGB but RGGB).
The gain would be better color information, that what makes Foveon images special.

I don't think they do the same as Hasselblad and other earlier attempts to increase true resolution by sensor movements. Earlier sensors had more blind gaps between the photosites making such techniques meaningful. Newer sensors have a dense array of microlenses (to gather more light per photosite), so there is not much left to sample in between.

@duartix: I agree that increasing the sample rate leads to a higher resolution even if you get highly overlapping samples. Some spatial highpass filtering then could generate some more 'distinct' pixels from the blurry raw sample. But it would be tough to increase resolution by a factor of 2.5 without the need of too many samples leading to much longer exposure times. Only if there would be strong light falloff of the microlenses towards their edges the overlap would be smaller and the gain per additional sample would be higher than my initial guess. So let us see an wait what approach Olympus will go.

Direct link | Posted on Dec 5, 2014 at 17:23 UTC

My guess is that they will use the sensor-shift to de-Bayer the image. They can move the red, green and blue pixels between the exposures so, that they get a full RGB sample for every pixel (like a Foveon sensor). This would not give us 'true' 40MP resolution, it is simply the same calculus of 'equivalence' Sigma uses for its cameras. (Sigma uses a factor of three, Oly gets a lower factor of equivalence, as the Bayer sensor is not RGB but RGGB).
The gain would be better color information, that what makes Foveon images special.

I don't think they do the same as Hasselblad and other earlier attempts to increase true resolution by sensor movements. Earlier sensors had more blind gaps between the photosites making such techniques meaningful. Newer sensors have a dense array of microlenses (to gather more light per photosite), so there is not much left to sample in between.

Direct link | Posted on Dec 5, 2014 at 10:36 UTC as 53rd comment | 5 replies

Price is much too low for the targeted audience.

Direct link | Posted on Nov 26, 2014 at 10:07 UTC as 51st comment
In reply to:

Volkan Ersoy: From Sony website, on 5-axis IS:

"When using a third-party mount adapter, performance, functionality and operation are not guaranteed and Sony will take no responsibility if a malfunction occurs."

I take this as an indication that 3rd party mount adaptor producers can work it out with their new models.

Doesn't surprise me. One of the usual blahblahs to keep users from using off-brand parts. And maybe the technical issue already mentioned by Smeggypants. I don't know if Sony will provide manual input for focal length lkie Olympus or Pentax.

Direct link | Posted on Nov 20, 2014 at 13:56 UTC

Good news for all waiting for a D300 replacement: This camera did not take engineering time from other projects. One might even doubt that it took designer time...

Direct link | Posted on Nov 18, 2014 at 14:03 UTC as 54th comment

At least logical step in the evoluton of digital cameras. Most of today's digital cameras are more or less conventional cameras where electronics have replaced film. This is one of the ways to use electronics more creatively. Time will show if this device will be useful. It is like evolution of life. There were several periods of high radiation (many new kinds of species appeared within a reletively short period) but only few of them survived.

Direct link | Posted on Nov 18, 2014 at 09:43 UTC as 15th comment
In reply to:

Summi Luchs: What surprises me most is the mediocre quality of the (prime) lens. Making good lenses is Leica's core competence. Lens quality is the first reason to buy a Leica (or is it second to prestige today ?). I assume Leica engineers know that and can do much better. So I have to ask if the tested camera was a dog - probably a misaligned lens ? Even that would put a shame on their QC (at least in relation to their price level). If not, I get more and more difficulties to understand Leica's business model.

Good center sharpness today is not the main differentiator of good and mediocre lenses. Even cheap kit lenses often offer good center sharpness wide open. I would have expected better edges for a premium price and the corners do not catch up very well even at f 5.6.

Direct link | Posted on Nov 13, 2014 at 16:07 UTC
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