Lives in United States United States
Works as a Engineer
Has a website at www.GGPortrait.com
Joined on Nov 23, 2010


Total: 42, showing: 1 – 20
« First‹ Previous123Next ›Last »
On Panasonic Lumix DMC-FZ1000 First Impressions Review preview (1267 comments in total)
In reply to:

pgphoto_ca: Be carefull....it's not a f2.8-f4 with this sensor (2.7x crop)....it's f5.6-f8 or more.......the crop factor need also to be apply to the aperture :)

A real 400mm f4...is much bigger ! :)

let me try to explain.

With a 2.7x crop at 25mm, on the camera marking, the focal length in actual is only 25/2.7 = 9.26mm.

f2.8 is always f2.8
so if aperture is f2.8 then the visual opening that you will be when the camera is at 25mm* is 9.26/2.8 = 3.31mm wide.

on now, we talk about full frame.
at 25mm with a 3.31mm wide visual opening then aperture will be 25/3.31 = 7.55 so on full frame with the same visual opening on the lens it will be f7.55.


f2.8 is f2.8 regardless of sensor size. it just tell you the amount of light at any one point on the sensor is having an f2.8 eqv light intensity. But in real life, a full frame will have a bigger pixel so

pixel size X f2.8 light intensity => a full frame will do better then a small sensor.

Direct link | Posted on Jun 12, 2014 at 08:13 UTC
On Little beauty: Nordin Seruyan's macro images article (352 comments in total)
In reply to:

Pixnat2: Very creative and beautiful, I enjoy it.

The comments about torturing insects are hilarious !
I guess those who made those comments never smashed a bug :-)

Hypocrisy at its paroxysm.

We do kill many insect and animals sometimes but it was never an evil intention. If you killed a frog that is poisonous, it may be still fine but if you killed a frog just for photography then it is evil.

Direct link | Posted on May 12, 2014 at 01:48 UTC
In reply to:

forpetessake: Before people start cheering and celebrating, they need to understand that Sony (just like other manufacturers) mislead the ignorant public providing equivalent FLs and conveniently forgetting to convert the f-stops to FF as well. So they would advertise RX-10 lens as 24-200mm f/2.8 equivalent, while it's 24-200mm f/7.6 equivalent.
Same with these lens designs, they provide an equivalent FL and 'forget' to provide an equivalent f-stop.
If you look at the actual equivalent numbers, like the first design is 26-112mm f/5.1-9.0 you'll be a lot less jubilant. The lenses are quite dim, no faster than they were in the compact 35mm film cameras of yesteryear.

hi forpetessake,

They are correct about your comments. But you are correct about yourself.

Direct link | Posted on Apr 29, 2014 at 03:54 UTC
On Nikon D4s First Impressions Review preview (1042 comments in total)
In reply to:

arhmatic: Oh, bubbly cameras...
Why everything these days look more and more like a melted bar soap?

By contrast, Fuji, Olympus - well done!

well said.... haha.... do you need to take into account of lens weight, flash weight etc to finally determine ergonomic...

Direct link | Posted on Feb 25, 2014 at 05:45 UTC
On Nikon D5300 Review preview (299 comments in total)
In reply to:

Zeisschen: With the a6000 news just prior to this, it's hard to believe both product pictures are made in the same year 2014. Compared to the modern Sony design this camera just looks like a cheap plastic tool from the 90s.

to Zeisschen, 1 like for your post.

Mirrorless today is no lack of lens. There are so many adaptors to choose from. I think it is only correct to say that more than 90% of the lenses in the world will fit an mirrorless camera or E Mount Camera.

Direct link | Posted on Feb 13, 2014 at 01:43 UTC
On Sony DSC-RX10 preview (725 comments in total)
In reply to:

munro harrap: We have to wait and see how the theory works in practice. I use an R1 still, at base iso in RAW it is excellent, and have been waiting for this since then. But I am puzzled because if the 1" sensor allows a max of 5472x3648, and the sensor is square, how come there is no max resolution available (according to you) of 5472x5472? There should be, indeed there must be, because otherwise the sensor is not square at all!!!.

What exactly IS going on here? Have Sony stupidly chosen to limit resolution, in which case we can all wait until Nikon grab the sensor improve the image processing as they always do and market their own version complete with 5472x5472 and we can bin our Hasselblad film bodies for good!

More accurate information please!

I understand that you take raw but do you understand the difference when you take raw with base iso and max iso?

Direct link | Posted on Oct 16, 2013 at 10:31 UTC
On Olympus PEN E-P5 Review preview (499 comments in total)
In reply to:

Elite83: It's a nice device, but I can't see spending that kind of money on an ILC that wasn't even APS-C.

A camera is not just about the sensor size.

Direct link | Posted on Oct 4, 2013 at 03:51 UTC
On Preview:canon-eos-70d (1311 comments in total)
In reply to:

DVT80111: Live view AF is still useless for still picture until Canon add a EVF.
The screen is too small and my arm is not long enough.

evf is even smaller then the screen?

what has it to do with your arm?

Posted on Aug 16, 2013 at 02:42 UTC
On 5 Reasons why I haven't used my DSLR for months article (592 comments in total)
In reply to:

bgbs: Do you shoot professionally? I do not bring a mirrorless to any of my client work, and they certainly don't expect me to. But I agree, mirrorless is my go to camera when I'm shooting around for pleasures sake.

what has shoot professionally to do anything with the camera?
U think small camera cannot be more expensive then a DSLR?
or small camera cannot produce a better photo then DSLR?

Direct link | Posted on Aug 1, 2013 at 06:05 UTC
On 5 Reasons why I haven't used my DSLR for months article (592 comments in total)
In reply to:

HawaiiVolcanoes: This article is meant to get attention..nothing more...sooo you've succeeded, this time. I believe that this article is short-sighted and irresponsible. You keep shooting with whatever you please..and I will continue to shoot with my 85 1.2L and 5DmkIII and amuse myself at the end of each day with a glass of rum, my images on my 27" iMac...and the ramblings of another so-called "photographer" that for some reason thinks that his opinion matters...all of these crummy little Pen Cameras and Mirror-less this and that cameras are meant to draw people away from Cellphones...Amen

Actually. what define a PRO is what photo they produce. U do not define a PRO just by having a expensive DSLR. A lot of PRO does not like small cameras but it is true that camera are getting smaller and better. It is really not about the camera. It is about the photographer.

If you insist on your thinking then is medium size is more PRO then full frame?

Direct link | Posted on Aug 1, 2013 at 06:03 UTC
In reply to:

whtchocla7e: What is the point of this campaign? To get some likes on Facebook?

I need way more motivation than that to get away from the computer and actually do something. I doubt the Internet is the right medium to transmit this type of a message.

Just to share my experiences.

There is this charity event which ask for donation to buy chairs for a school who cannot afford new chairs. So I paid for a furniture company to deliver the 50 chairs to them. Something that shocked me is that the furniture company tells me that the organization ask for a refund and demanded to return the chairs and in turn refund the money to the CHARITY organization.

It really makes me mad.

@Impulses may just be correct for most of the campaigns.

Direct link | Posted on Jul 3, 2013 at 05:27 UTC
On Canon EF-M 11-22mm f/4-5.6 IS STM Preview preview (80 comments in total)
In reply to:

Beat Traveller: What I don't get is why this lens is only compatible with the EOS M. What about the EOS100 they just released? Why would you go to all the trouble of designing "the world's smallest DSLR" and then develop compact lenses that can't be used with it?

The heaviest lens is much more heavier then the heaviest camera. So it is more important to reduce the weight and size of the lens then to reduce the weight and size of the camera.

Canon have the smallest DSLR but got no small lens that goes with it. So eventually why smallest body only?

Direct link | Posted on Jun 6, 2013 at 08:27 UTC
On IMG_1.acr photo in dpreview review samples's photo gallery (3 comments in total)

i noticed that dpreview say that this is a preproduction copy and quality is not that good. In this case, why give a preview or bad quality images?

Direct link | Posted on Jun 5, 2013 at 05:46 UTC as 1st comment | 1 reply
On Just Posted: Canon EOS 6D In-depth Review article (530 comments in total)
In reply to:

Fatality: I wouldn't upgrade to 6D not even for $500. To me, the 6D is worth about $1000 MAX.. My 60D is more superior than this camera (which currently sells for $780), not only that it takes EF and EF-S lenses, but it even has a shutter speed of 8000.. pfff This is a major failure from Canon.

Actually there is no diff for 1/4000 and 1/8000. What shot needs 1/8000 and cannot do with 1/4000?

Direct link | Posted on Feb 14, 2013 at 07:54 UTC
On Best Camera of 2012: And the Winner is... article (1412 comments in total)
In reply to:

Anastigmat: I have 2 words for the results of this poll: ballot stuffing.

if you think people vote more then once (with multiple accounts) for EM5 then what makes you think that people will not vote more than once for nikon & canon & sony? Respect the decision of others. If one day, others commented that your photo are lousy then your photos are lousy to THEM. As long as in your heart your camera is the best then your camera deserves YOU.

Direct link | Posted on Jan 2, 2013 at 08:58 UTC
On Best Camera of 2012: And the Winner is... article (1412 comments in total)
In reply to:

G L: I have a m43 camera and the EM5 is what I would like to have. So I voted for it.

Just one remark: If Nikon had not the D800 and the D600 in the competition they might have won.

But anyway, the EM5 is a camera of which many people think it is a very good compromise between capability, size and prize. It really is an achievement to bring all these features in such a small package. The EM5 deserves this win.

I am a sony supporter... When I see this EM5. I am shocked. So immediately I went to try this EM5. All I can say is that for that size and that price, it deserves to win.

Direct link | Posted on Jan 2, 2013 at 08:43 UTC
On Best Camera of 2012: And the Winner is... article (1412 comments in total)
In reply to:

VadymA: DPR, please change the title to "The Most Interesting Camera of 2012", because this is what this poll is really about. I don't have any of the listed cameras but I voted OM-D because to me it was rather a head turned in 2012 and I think it deserved its place fair and square. Is it the Best Camera out there? Probably not. But we are just DPR Readers, not the camera experts. This is Our poll, Our opinion, Our fun way to pick "The Camera of 2012". Those who believe otherwise and come here with angry comments only make fools of themselves.

The word Best is very subjective. Wild life shooter and a wedding photographer has different best in their heart. So whose is best?

Direct link | Posted on Jan 2, 2013 at 08:41 UTC
On Just Posted: Sony Alpha SLT-A99 review article (498 comments in total)
In reply to:

Peter 111: Overall score A99: 84%
D800E: 84%
D800: 82%
5D3: 82%

"It stands out as the only full frame camera to offer in-body stabilization, an EVF and articulated rear screen." WYSIWYG EVF, throwing away the Hoodman now. Sold my D800 and got an A99, loving it :)

I believe the one who produce the perfect photo is the photographer and not the camera.

you memtioned that EVF will always have too much lag for precisely timed shots. May I know how much lag are you talking about? Sony is for SONY users only

Direct link | Posted on Dec 13, 2012 at 08:16 UTC
On Just Posted: Sony Alpha SLT-A99 review article (498 comments in total)
In reply to:

jmmgarza: I am starting to find your reviews quite tedious. My D800 is perfect.

tedious is because D800 is perfect. Since D800 is perfect then the rest will never be good. The Best camera is always the one in your hand.

Direct link | Posted on Dec 13, 2012 at 08:07 UTC
On Just Posted: Sony Alpha SLT-A99 review article (498 comments in total)
In reply to:

Spectro: if the translucent mirror flipped I would be interested.

Translucent mirror to flip where? It is a limitation in the old SLR design thats why the mirror need to flip. else it will be blocking the sensor. So if can dun flip then why you still want to flip?

Direct link | Posted on Dec 13, 2012 at 08:04 UTC
Total: 42, showing: 1 – 20
« First‹ Previous123Next ›Last »