photonius

photonius

Lives in United States United States
Joined on Jan 5, 2008

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Total: 62, showing: 21 – 40
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On Battle of the Wi-Fi Cards: Eye-Fi vs. Transcend article (178 comments in total)
In reply to:

photonius: What about the Sandisk Eye Fi cards? Is this simply a licensed version of the Eye-Fi card with the same software and features as described here, or are there differences?

Thanks, yes, the Sandisk Eye-Fi cards are slower, but also cheaper. I noticed they are not sold everywhere though. Perhaps licensing issues, or WiFi regulation issues. I'd be interested to have some cheap WiFi capability for a non-WiFi body for test shoots in a home environment, no large data transfers, just avoiding a cable to stumble over.

Direct link | Posted on Aug 29, 2013 at 11:43 UTC
On Battle of the Wi-Fi Cards: Eye-Fi vs. Transcend article (178 comments in total)

What about the Sandisk Eye Fi cards? Is this simply a licensed version of the Eye-Fi card with the same software and features as described here, or are there differences?

Direct link | Posted on Aug 29, 2013 at 09:06 UTC as 59th comment | 6 replies
In reply to:

Timmbits: yet another itty bitty crappy tiny sensor!
I wish they would offer these camera with a bigger one - especially at these very long focal lengths, where IQ suffers significantly.

That's the whole point of the small sensor. This lens is 200mm in focal length to give 1200mm FF equivalent field of view. If you make the sensor bigger, you need a bigger lens. For a m43 sized sensor, you need a 600mm lens - look up how big those are.

Direct link | Posted on Jul 19, 2013 at 18:44 UTC
On Preview:canon-eos-70d (1333 comments in total)
In reply to:

D1N0: This sensor is useless for people that shoot through the viewfinder. Canon should put it in a mirrorless and focus on superior iso for their dslrs (not just almost on par with Nikon because that won't last very long). Wouldn't you need even better lenses because it is actually a 40mp sensor with only half the pixels actually used for imaging?.

No, there are still only 20 Mp microlenses. It's the sensor under the microlenses that is split into two photosites, so the phase can be read by only reading the left or right one. However, for the image, the signal from both is combined, so the result should be similar to a "simple" 20Mp sensor, unless all the extra electronics makes a lot of extra noise. On the other hand, averaging two photosites will reduce shot noise, so the image could actually be less noisy than a simple 20MP sensor. Dynamic range could suffer, if each of the two photosite would hold less than 50% of photons a single large photosite could hold.

Posted on Jul 2, 2013 at 12:22 UTC
On Samsung introduces 10mm F3.5 Fisheye for NX article (101 comments in total)
In reply to:

qwertyasdf: I really hope the NX line success with it incredible lenses
But the unnecessary long flangeback distance is like a genetic disorder that will plague generations to come
The inability to use m mount lenses and the stupid protruding lens mount killed the deal for me

But it means one should be able to use this fish-eye with an adapter on Sony or Canon mirror-less... ;-)

Direct link | Posted on Jun 11, 2013 at 21:43 UTC
On Canon EF-M 11-22mm f/4-5.6 IS STM Preview preview (82 comments in total)
In reply to:

Jefftan: Sony NEX 10-18 F4 225 gram
Canon 11-22mm F4-5.6 220 gram

not as wide, not as bright and same weight

What's going on? Is this the best what Canon can do?
Can't understand

Well, look at the photozone review of the Sony lens. It's optical properties are not that great, rather poor at f4. All points towards the Canon being even better than it's well regarded EF-S 10-22. So, I rather prefer Canon's approach, even if on paper Sony's specs seem better.

Direct link | Posted on Jun 6, 2013 at 18:41 UTC
In reply to:

Just another Canon shooter: Isn't this lens a bit too long for a UWA for a mirrorless camera (shorter flange distance and all that)?

Even though the EOS-M has a much shorter flange distance, ALL mirror-less systems have a flange distance around 20mm (except Pentax Q), which is double the distance for UWAs (around 10mm), so you still need a retrofocus design. And in any lens design, the lens elements take up space, so the retrofocus elements will take up a bit of space before you even come to the part of the lens that needs to collect the light at wide angle at the front. Further, no matter how short the flange distance, the fact is that due sensor design (and the microlenses on it), you cannot have light come in at extremely shallow angles, otherwise the light at the edges will just be lost. So, it seems the rear element is usually not closer than about 20mm to the sensor. That's why there is no 10mm pancake. Theoretically (thin lens), a 10mm lens would only be 10mm away from the sensor, and have a diameter of 10mm for f1.0! The only way to go smaller is with smaller sensors (Nikon, Pentax Q)

Direct link | Posted on Jun 6, 2013 at 10:27 UTC
In reply to:

ryanshoots: More video sucks. Buggy players, mandatory commercials at the beginning and so on. I'll take a photo by a professional any day over 99% of the punters with an iphone video.

I understand the economics of it, but don't think for a minute that quality is going up.

Youtube is the last place I'd go for a product review, usually 90 % of the time is wasted with useless information that I can read up faster in a text like dpreview.

Direct link | Posted on May 31, 2013 at 09:30 UTC

cool, I keep the old computer and the old version...

Direct link | Posted on May 6, 2013 at 21:51 UTC as 596th comment

Cool, now we can have exactly the same picture a million times over..... In the light of reducing environmental pollution, I suggest only the first person takes the shoot, and shares it with the remaining 999'999...

Direct link | Posted on Mar 31, 2013 at 18:05 UTC as 9th comment
In reply to:

kimchiflower: Good luck shooting at 1056mm f/6.5

Not sure what's more futile, the megapixel race or the megazoom race?

Well, it might actually not be that bad based on the superzoom bridge cameras, if image stabilization works ok.
What's more futile is that at 1056 with aperture f6.5, on such a small sensor, you might actually only get about 2Mp effective resolution due to diffraction.

Direct link | Posted on Mar 22, 2013 at 17:13 UTC
In reply to:

wallbreaker: I wished it was 1 inch sensor

Then it would only be a 500mm (35mm) equivalent lens at the long end, ignoring also the diameter which will not be big enough to avoid vignetting.

Direct link | Posted on Mar 22, 2013 at 17:11 UTC
In reply to:

Cameron R Hood: The distortions in that lens must be unbelievable.

That's why it seems that you can't get any RAW files from any of these superzoom bridge cameras. Distortion, CA will be corrected directly in camera.

Direct link | Posted on Mar 22, 2013 at 17:09 UTC
On Canon EOS 100D/Rebel SL1 Hands-on Preview preview (355 comments in total)
In reply to:

forpetessake: As it was predicted DSLRs won't surrender to mirrorless without putting up a good fight. This is the first such blow -- a camera almost as light and small as mirrorless, but with the full DSLR advantages with hundreds of DSLR lenses fully compatible.
Competition is good, keep them coming!

P.S. It actually beats Olympus OM-D in all respects including weight! See comparison: http://www.dpreview.com/products/compare/side-by-side?products=canon_eos100d&products=oly_em5

Mirrorless has only the advantage in lenses in the wide-angle range because of the shorter flange distance, so you don't need retrofocus designs in the 20-40mm range. For long focal lenses there does not have to be any advantage at all, if the pixel density is the same (e.g. a 24MP Canon crop, versus 16MP m4/3). Then you just crop the Canon a bit and you have the same resolution as the Olympus. Canon doesn't have a 24mp sensor yet, but Nikon/Sony already have. Well, one can argue that m4/3 can make more MPs on their sensor, but the problem is, you can't shrink pixel size unlimited due to diffraction. Even now 4/3 lenses are already loosing resolution from f5.6 on with a 16mp sensor.

Direct link | Posted on Mar 21, 2013 at 20:04 UTC
On Google pulls plug on desktop version of Snapseed article (65 comments in total)

They just bought it for the mobile versions, they rest they didn't care.

Direct link | Posted on Mar 14, 2013 at 17:19 UTC as 40th comment
On Fujifilm introduces FinePix SL1000 50X superzoom article (34 comments in total)

hmm, always something missing. Either you get RAW, but no GPS, or you get GPS, but no raw (e.g. Sony). Can't we have both?

Direct link | Posted on Feb 12, 2013 at 17:12 UTC as 3rd comment

Did I miss something? Where is the analysis of image quality under image quality? I mean slightly different colors or contrast can be adjusted, but which of these programs can produce, for example, the best looking output from a high ISO RAW in terms of resolution and noise?

Direct link | Posted on Jan 24, 2013 at 11:12 UTC as 108th comment | 1 reply
In reply to:

ddtwenty: I am not expect to get camera with long zoom range. Just a shortter zoom range but to be more on tele end for example I like to see a compact body camera like this onlympus one come with super tele end with zoom power of only 8x like 125-1000 f2.8-5.6 with sensor size between 1/1.7inch to 1inch. But seem not any brands likely to introduce in to the market.

That's size is perhaps about half the size of APS-C (which is 1.6x smaller than FF). 1000mm (FF equiv.) / 1.6 / 2 = 300mm lens. Ok, look at the Canon EF 70-300 IS lens to see how big that will be
http://www.photozone.de/canon-eos/566-canon70300f456isapsc

Direct link | Posted on Jan 8, 2013 at 22:26 UTC
In reply to:

Pierre Couture: Same zoom reach as the Pany FZ200, but with lesser grip, and slower lens. I like my TZ5, but this kind of reach is too big without a tripod on such a small body.

Actually not. It works quite well on the Sony HX20V/HX30V cameras (500mm equiv).

Direct link | Posted on Jan 8, 2013 at 22:19 UTC

anybody buying these cameras?

Direct link | Posted on Oct 9, 2012 at 15:22 UTC as 25th comment | 6 replies
Total: 62, showing: 21 – 40
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