forpetessake

forpetessake

Lives in United States Transylvania, United States
Works as a exorcist
Joined on Oct 3, 2011
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Comments

Total: 511, showing: 41 – 60
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On What is equivalence and why should I care? article (2020 comments in total)
In reply to:

gianstam: About total light.
So, I have a question to DPReview?
Do the Sony and Nikon FF cameras produce different noise at pixel level when used at different formats for the same sceen?

My point of view: the sensor does not behave as a whole.
The electric signal from each photosite is not affected by the the total light.
Sensor is not a sun light collector (larger surface, more electric power).
Image (and noise and DR) is produced by pixels. Same tecnology and size pixels produce the same results.
So the advandage of the larger sensor appears not because of the more light but because of the more (same sized) pixels or because of the larger pixels (for the same Megapixel sensors).

Very informative article by the way.

How can somebody write "Very informative article by the way", and in the same post demonstrate he didn't understand anything?

Direct link | Posted on Jul 8, 2014 at 00:54 UTC
On What is equivalence and why should I care? article (2020 comments in total)
In reply to:

Fygaren: If only they could make a multi-format equiva-lens...
Ok, way past my bedtime!

Well, focal reducers do exactly that (sans imperfections).

Direct link | Posted on Jul 8, 2014 at 00:47 UTC
On What is equivalence and why should I care? article (2020 comments in total)
In reply to:

Bjorn_L: Interesting write up. Nicely done. This is a topic which gets flogged to death in the forums (typically with more passion than facts); it will be nice to have a well written article to refer to.

I'm afraid it changes nothing. There were nice articles before that, it never stopped flat-earthers from denying the equivalence. If ignorance is a bliss, why would they want to be confused with the facts?

Direct link | Posted on Jul 7, 2014 at 23:54 UTC
On What is equivalence and why should I care? article (2020 comments in total)
In reply to:

Wilight: I'm really impressed with the patience of dpreview staff to awnswer dumb questions/comments, even after providing an article like this. I can't realize why such a simple thing still produces so much babbling these days. For me, it's like trying to explain why 2+2 equals to 2x2. Are most of dpreview readers kids or what?

No they are not kids, for kids understand these things easily. They are an example of an average voter: stupid and ignorant.

Direct link | Posted on Jul 7, 2014 at 23:48 UTC
On What is equivalence and why should I care? article (2020 comments in total)
In reply to:

joe6pack: I like to see some mentioning of focal reducers. A focal reducer focuses more light on a smaller sensor. Which means more light and wider FoV. But, AFAIK, the DoF is unchanged.

The DOF and light flux over the sensor surface always behave in tandem. You can't get more of one without proportionally less of the other.

Direct link | Posted on Jul 7, 2014 at 23:42 UTC
On What is equivalence and why should I care? article (2020 comments in total)
In reply to:

blohum: Great article DPR and it's that last sentence that people always seem to forget: "There's no universally ideal 'sweet-spot' to that trade-off: but understanding equivalence can help you work out which balance is best for you."

I chose m43 knowing full-well what the limitations are. Will FF give better IQ... absolutely, will FF give thinner DOF, of course... do I care, not a bit... m43 is MY 'sweet-spot'.

There isn't really a well defined sweet-spot, not in an absolute sense anyway.
As Sony keeps demonstrating it, the camera size/weight isn't really a function of the sensor size, it's ergonomics is mostly determined by an average palm size. And as the physical principles explained in the article demonstrate that most equivalent lenses are also going to be the same in size/weight no matter what the sensor size is. When Sony finally releases FF camera in a NEX body with a tiny 24-70/5.6 lens (equivalent to 12-35/2.8 m43 lens) where that sweet-spot is going to be?

Direct link | Posted on Jul 7, 2014 at 23:31 UTC
On What is equivalence and why should I care? article (2020 comments in total)
In reply to:

lacikuss: Excellent article...

So why then a Sony RX-100 III is priced at $850? It should cost $450 according to this article...

"There is no "depth of field advantage", as it states in the article." -- lightpainterx is a writer, not a reader :)

Direct link | Posted on Jul 7, 2014 at 19:29 UTC
On What is equivalence and why should I care? article (2020 comments in total)
In reply to:

lacikuss: Excellent article...

So why then a Sony RX-100 III is priced at $850? It should cost $450 according to this article...

Because it's been repeated 24-70mm f/1.8-2.8 so many times, an average clueless consumer thinks they are getting a better deal than Canon 5D3 with 24-70/2.8.
The blatant manufacturers lies (i.e. advertisement) starts backfiring. They were happy advertising cameras with crop sensors until Sony started releasing FF mirrorless. Sony needs to get across the truth to the consumers now or they won't understand why they should pay more and get bigger equipment.

Direct link | Posted on Jul 7, 2014 at 19:23 UTC
On What is equivalence and why should I care? article (2020 comments in total)

Will this article finally stop those f2=f2=f2 stupid arguments? I doubt it. Stupid arguments come from stupid people: those same people who were explained the equivalence to many times before without any success.

Direct link | Posted on Jul 7, 2014 at 19:02 UTC as 286th comment | 13 replies
On Nikon 1 V3 First Impressions Review preview (432 comments in total)
In reply to:

Marty4650: Everyone has different preferences. The real question is... who is this camera designed for?

This camera is confusing.

It is bigger than it needs to be. So it isn't the best design for a compact carry camera. It is more expensive than some semi-pro DSLRs are, so it isn't a good value. Is this camera worth more than an E-M5 or an X-E2 or a NEX-6? Because it sure costs more.

It uses a cell phone memory card, for some reason that no one can seem to understand. Perhaps they just wanted it to be different?

Having a separate and "optional EVF" might seem like a good idea on paper, but in reality it just creates the need to carry something else around. Something that could be lost, dropped or misplaced. This might be why Olympus has been more successful with their OMD line than their Pen line.

To me, it looks like this camera only makes sense for a Nikon fan who wants a "companion camera" for his Nikon DSLR, and cannot tolerate any other brand name sitting in his camera bag.

The camera is too much a sacrifice of the image quality with such a small sensor and for what? There is nothing that it offers in return.

Direct link | Posted on Jul 2, 2014 at 17:25 UTC
On Nikon 1 V3 First Impressions Review preview (432 comments in total)
In reply to:

mikew: I just printed a glorious 17 x 22 print from a V3/ 70-200 2.8 shot of a Black Skimmer skimming along the water at a 45 degree angle toward me. It's the best shot of a skimmer I have got from decades of trying with D4 D800 D7100 etc. My only problem with that shot was that I had to choose from 20 other perfectly focused shots the V3 produced from that pass alone. And that was only the second time out with the camera. Even the D4 doesn't begin to approach the focus tracking ability of this camera. I am not saying this is the only camera you will ever need, but let's discuss this camera rationally! The technology in the camera is staggering. If I didn't have an extensive Nikon system, it would hold no interest for me. But as an addition to my system, especially for birds in flight, it's mana from heaven. The price is high, but given what I have seen it produce from 2 brief sessions, I have no regrets about getting it.
And I, too, hate the micro SD card thing!

I just love the hilarious posts like, I've just printed a wallpaper from my iphone and it's great. I wasn't able to achieve anything like that from my 10 Leicas and 20 Hasselblads.

Direct link | Posted on Jul 2, 2014 at 04:36 UTC
On Panasonic Lumix DMC-FZ1000 First Impressions Review preview (1282 comments in total)

Sony still remains the winner in this category: the images do look better in the resolution, color, and overall rendering, and though Panasonic has an extra reach the lens is very slow (not that Sony is fast).

Direct link | Posted on Jul 2, 2014 at 00:23 UTC as 141st comment
In reply to:

Retzius: I think this thing is going to have amazing image quality. Too bad it looks like butt.

@Thematic: "Everyone who has tried" -- who are those 'everyone'? There aren't any serious reviews available. Amazing how much faith people have in the absence of any factual information.

Direct link | Posted on Jul 1, 2014 at 19:13 UTC
In reply to:

forpetessake: How is Sigma's "try before you buy" any better than buy and return for full refund if not satisfied most vendors offer? In fact it's worse, Sigma offers just one week, while most vendors allow 30 days of use.

@Just a Photographer -- this is just a nonsense. No vendor is admitting they sell an open box as a new one, it's illegal. They may admit making a 'mistake' but you can just easily return it. Also that 'regret' comment is just silly.

Direct link | Posted on Jul 1, 2014 at 18:49 UTC
In reply to:

Retzius: I think this thing is going to have amazing image quality. Too bad it looks like butt.

What's the reason to believe it will have much better image quality than the previous incarnations? We'll likely still see the same colors all over the place, the noise worse than from 1" sensors, and the battery dying in a matter of minutes. So far Foveon was able to show a better resolution per pixel, which is the least of people's concerns, but much worse in other more important areas. There are no reasons to believe this camera will be an exception.

Direct link | Posted on Jul 1, 2014 at 18:44 UTC

How is Sigma's "try before you buy" any better than buy and return for full refund if not satisfied most vendors offer? In fact it's worse, Sigma offers just one week, while most vendors allow 30 days of use.

Direct link | Posted on Jul 1, 2014 at 18:37 UTC as 30th comment | 13 replies
On Nikon 1 V3 First Impressions Review preview (432 comments in total)
In reply to:

Nemsi: No offence, but what's the whole point of the 1 system, with small sensors and buying extra lenses for the camera, who are those for? Really sorry, I guess it's just me.. :/

"those who want to have long telephoto performance, but can't afford a 800/5.6 lens..." -- you meant to say 810mm f/16 FF equivalent. The lens is pretty much useless for anything except bright sun light and static objects. And b.t.w you can get practically the same result cropping a 300mm f/5.6 FF lens, pixel density really makes little difference.

Direct link | Posted on Jul 1, 2014 at 05:43 UTC
On Nikon 1 V3 First Impressions Review preview (432 comments in total)

Nikon 1 competes against Sony RX series and does it poorly.

Direct link | Posted on Jul 1, 2014 at 05:35 UTC as 90th comment
On Tamron SP 150-600mm F/5-6.3 Di VC USD Lab Test Review preview (217 comments in total)
In reply to:

jaykumarr: Dpreview, There should be a measure at 500mm. After 400mm jumping 200 mm to 600 does not cut it.

My opinion is, for the price this lens is very good. But 600mm is mere feel good, since at 600mm it just provides 10%-15% more resolution than a 400mm prime. (even comparing with this lens itself, it will bring about 20-25% more detail only zooming from 400 -> 600)

The canon 200-400mm resolves 15% more throughout the range, but too pricey.

What a moron that jaykumar is, doesn't even understand the basics of cropping, still feels the need to speak on every topic.

Direct link | Posted on Jun 27, 2014 at 22:11 UTC
On Tamron SP 150-600mm F/5-6.3 Di VC USD Lab Test Review preview (217 comments in total)
In reply to:

jaykumarr: Dpreview, There should be a measure at 500mm. After 400mm jumping 200 mm to 600 does not cut it.

My opinion is, for the price this lens is very good. But 600mm is mere feel good, since at 600mm it just provides 10%-15% more resolution than a 400mm prime. (even comparing with this lens itself, it will bring about 20-25% more detail only zooming from 400 -> 600)

The canon 200-400mm resolves 15% more throughout the range, but too pricey.

@jaykumarr: Many flaws in your analysis. Firstly, no, you won't get the same resolution from cropping 400mm image, a difference is rather significant. Secondly, by cropping you are loosing more than a stop in light and DOF. Thirdly, if you compare 400/5.6 cropped to an equivalent 600/8, the crop is nowhere near in resolution.

Direct link | Posted on Jun 26, 2014 at 01:17 UTC
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