ARTASHES

ARTASHES

Lives in France France
Works as a Student
Joined on Sep 11, 2009

Comments

Total: 230, showing: 21 – 40
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In reply to:

stevez: I too am surprised at how large this lens is. Considering that its almost identical in size, weight and dimension as my Nikkor 300mm AFS f4, I can't help but think that Olympus might be considering a full frame mirrorless down the road. Another thought is that the lens was designed with an overly large image circle in order to assure excellent edge to edge sharpness. Hmmmm?

I understand what you're saying : 300mm f4 mounted on 4/3 delivers on the sensor surface the same amount of raw light as 600mm F8 on FF. I am getting it. The thing is that in today's industry especially for comact cameras nobody is talking that way. We do get FF equivalent focal ranges for comacts (25-200mm for exemple) but never FF equivalent aperture. Assuming that everybody knows that the sensor size is a game changer for IQ the equivalence on aperture becomes irrelevant (not for DOF However). If not the people would not juge cameras potential by their sensor size but by FF equivalent aperture. That's how I see it.

Link | Posted on Jan 6, 2016 at 23:50 UTC
In reply to:

stevez: I too am surprised at how large this lens is. Considering that its almost identical in size, weight and dimension as my Nikkor 300mm AFS f4, I can't help but think that Olympus might be considering a full frame mirrorless down the road. Another thought is that the lens was designed with an overly large image circle in order to assure excellent edge to edge sharpness. Hmmmm?

What you are talking about is efficenty not performance. 2L 4 cylinder 150hp motor has the same efficency per litre than 4l V8 with 300Hp doesn't mean that they have the same perf. I pointed out Canon because of it's old sensor tech, for the rest it's all Sony so yes they are about same and I think getting it from the begging. but it's not the thing, the thing is that 600mm F8 mounted on FF at the same shutter speed will go 2 steps up in ISO to get the same exposure of 300mm F4 on 4/3, yes the pics will be identical FF being 2 steps better, I got that thing about absolut equivalence/compensation due to sensor size/IQ diff between those 2 but the fact is the technically 300mm F4 on 4/3 remains two steps brighter lens than 600mm f8 . That what I was saying before being called some kind of "idiot"
Peace !

Link | Posted on Jan 6, 2016 at 20:03 UTC
In reply to:

stevez: I too am surprised at how large this lens is. Considering that its almost identical in size, weight and dimension as my Nikkor 300mm AFS f4, I can't help but think that Olympus might be considering a full frame mirrorless down the road. Another thought is that the lens was designed with an overly large image circle in order to assure excellent edge to edge sharpness. Hmmmm?

With that logic any smartphone sensor is better than current Canon sensors, nobody actually cares about sensor performance but what camera delivers

Link | Posted on Jan 6, 2016 at 18:18 UTC
In reply to:

stevez: I too am surprised at how large this lens is. Considering that its almost identical in size, weight and dimension as my Nikkor 300mm AFS f4, I can't help but think that Olympus might be considering a full frame mirrorless down the road. Another thought is that the lens was designed with an overly large image circle in order to assure excellent edge to edge sharpness. Hmmmm?

falconeyes
The real thing is the sensor size in the end and I hope I made your day with my nonsense.

Link | Posted on Jan 6, 2016 at 17:46 UTC
In reply to:

stevez: I too am surprised at how large this lens is. Considering that its almost identical in size, weight and dimension as my Nikkor 300mm AFS f4, I can't help but think that Olympus might be considering a full frame mirrorless down the road. Another thought is that the lens was designed with an overly large image circle in order to assure excellent edge to edge sharpness. Hmmmm?

http://www.dpreview.com/articles/2666934640/what-is-equivalence-and-why-should-i-care/2
Bonne lecture !

Link | Posted on Jan 6, 2016 at 17:23 UTC
In reply to:

stevez: I too am surprised at how large this lens is. Considering that its almost identical in size, weight and dimension as my Nikkor 300mm AFS f4, I can't help but think that Olympus might be considering a full frame mirrorless down the road. Another thought is that the lens was designed with an overly large image circle in order to assure excellent edge to edge sharpness. Hmmmm?

falconeyes
No it just isn't. When you mount a prime lens on your FF or APS-C does it change your aperture value on each ?

Link | Posted on Jan 6, 2016 at 17:18 UTC
In reply to:

stevez: I too am surprised at how large this lens is. Considering that its almost identical in size, weight and dimension as my Nikkor 300mm AFS f4, I can't help but think that Olympus might be considering a full frame mirrorless down the road. Another thought is that the lens was designed with an overly large image circle in order to assure excellent edge to edge sharpness. Hmmmm?

Give me a try, I love learning

Link | Posted on Jan 6, 2016 at 16:57 UTC
In reply to:

stevez: I too am surprised at how large this lens is. Considering that its almost identical in size, weight and dimension as my Nikkor 300mm AFS f4, I can't help but think that Olympus might be considering a full frame mirrorless down the road. Another thought is that the lens was designed with an overly large image circle in order to assure excellent edge to edge sharpness. Hmmmm?

Not F8, F4 always, lens brightness is not about cumulative quantity of light but about it's density, it will be f4 even if mounted on 1/2.3 sensor

Link | Posted on Jan 6, 2016 at 16:33 UTC
In reply to:

stevez: I too am surprised at how large this lens is. Considering that its almost identical in size, weight and dimension as my Nikkor 300mm AFS f4, I can't help but think that Olympus might be considering a full frame mirrorless down the road. Another thought is that the lens was designed with an overly large image circle in order to assure excellent edge to edge sharpness. Hmmmm?

It's is 600mm equivalent on 4/3. The lens focal ranges for all lenses are presented by full frame standard mesures.

Link | Posted on Jan 6, 2016 at 16:24 UTC
In reply to:

ARTASHES: As I can see what he is doing is reposting the screenshots and not downloaded ones, so making screenshot of a screenshot again and again will cause this degradation with or without instagram.

it's not about format but what is seen on your screen, maybe you iphone shows something that is already degraded compared to source file and so screenshot will be to, no matter which format you use

Link | Posted on Aug 18, 2015 at 20:39 UTC
In reply to:

ARTASHES: As I can see what he is doing is reposting the screenshots and not downloaded ones, so making screenshot of a screenshot again and again will cause this degradation with or without instagram.

Probably, but that shows the uselessness of this particular method of test.

Link | Posted on Aug 18, 2015 at 20:09 UTC
In reply to:

ARTASHES: As I can see what he is doing is reposting the screenshots and not downloaded ones, so making screenshot of a screenshot again and again will cause this degradation with or without instagram.

I just tried to do the same thing that he did but instead of uploading the photo to intagram each time, I just took 50 screenshots of the same picture, each time taking the most recent one, and so the photo became a complete crap (android lillipop) and so assuming that making screenshots are a source of degradation, it's becoming hard to define the part of instagram in it.

Link | Posted on Aug 18, 2015 at 19:54 UTC

As I can see what he is doing is reposting the screenshots and not downloaded ones, so making screenshot of a screenshot again and again will cause this degradation with or without instagram.

Link | Posted on Aug 18, 2015 at 19:21 UTC as 37th comment | 12 replies
In reply to:

nerd2: Actually I think RX 100 III can be better than this. LX100 has larger sensor but it is not BSI - so noise per ISO can be actually better with RX, and RX has much higher MP too. Lens spec is almost equivalent (if we ignore equivalence, just like panasonic does for marketing)

And RX is more compact and has flip LCD too (which should matter a lot for the target audience of these cams)

Not true, BSI tech in RX100 can't compensate the size diff over 4/3 sensor, it gives a very marginal boost in perf especially in larger size sensors
just check out RX III vs any last 4/3 in DxO scores

Link | Posted on Oct 2, 2014 at 22:01 UTC
On article Nikon D4s First Impressions Review (1032 comments in total)
In reply to:

gskolenda: I don't get it! $6,500 bucks for a 16mp FF camera body, they don't need to sell very many of these to make a huge profit, regardless of the market conditions!

This is a big time Rip in my mine, I would take the D800-D800e any day over this camera.

Sport, sport ...

Link | Posted on Feb 25, 2014 at 17:00 UTC
On article Canon PowerShot G1 X Mark II: a quick summary (533 comments in total)
In reply to:

nevada5: Please please please - dynamic range.

it will have the same old sensor !!! :/

Link | Posted on Feb 12, 2014 at 07:58 UTC

with my limited acknowledges about sensor I think this one isn't any better than any actual FF sensor on the market, but the it's advantage is that it will use total surface of the sensor to create an fullhd video because the whole sensor has exactly the same resolution as the fullhd while the 20mp+ sensors can't do this, in fact to create a fullhd D800 for example will have to take only several pixels from given surface to avoid re-sizing from 36 mp and so it uses only some part of whole surface that's impact the IQ in low light, conclusion : the size of individual pixels is important for video making but is irrelevant for photography where you can resize and so this penalize big resolution sensor for video making and that's why Canon made this one with such big pixels

Link | Posted on Sep 15, 2013 at 11:00 UTC as 16th comment | 4 replies
In reply to:

Marty4650: Hasselblad could learn a LOT from Leica.

Hasselblad takes a nice camera, puts a clown suit on it, and sells it for a 600% premium. Then everyone has a good laugh.

Leica takes a nice camera, makes it even nicer without changing anything on the inside. They just improve the styling, create a bunch of nice cases and straps, and include some better software. Then they slap a more reasonable 80% premium on it. At least relatively speaking it is a lot more reasonable.

Then some people actually buy it.

You have to give Leica credit for this.

well they could improve jpeg engine of pana at least but I don't think so

Link | Posted on Sep 9, 2013 at 16:19 UTC
On article Panasonic Lumix DMC-FZ70 Sample Images (69 comments in total)

In reviews it would be nice to have some charts like focal range/aperture to have better idea about brightness of lenses especially for those super zooms , because here I see 20-1200 for 2.8-5.9 and I say myself "cool !!! it will be pretty bright at middle range" but as I could conclude from samples it drops pretty fast too 5.6 (I assume not knowing if it's the max aperture for those focal ranges) and keeps relatively fixed it's aperture to it's max zoom

Link | Posted on Aug 13, 2013 at 13:24 UTC as 40th comment
On article Nikon launches budget-friendly Coolpix L620 ultra zoom (40 comments in total)

The raison why Nikon ot other companies put as some say those 'tiny' sensors with such high megapixel count on their compacts is Sony and the mass production effect, that's what the sensor market propose them, and they take it because it's probably the best product for the price
if they put bigger sensor, they have to put bigger lenses etc and so on, and the price will rise and so the sales will go down, if you want a big sensor compacts you can have it, there are several ones depending of what you mean by saying 'big' sensor
1/2.3 already have it's market and production lane, on so it's somehow the optimum for sensors that provided and megapixels that rise are usefull for marketing and dont take from you anything but your disk-space so it isn't end of the world

Link | Posted on Aug 6, 2013 at 16:05 UTC as 17th comment | 3 replies
Total: 230, showing: 21 – 40
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